Where does the Lake go, when the Geese
fly to Canada?
|
I think it was Heraclitus who said that even
in our sleep we labor to build the world.
|
Marcus Aurelius (121
– 180 AD)
|

There
seems to be a love affair between the Vatican and Big Bang. "I
was
there when Abbe Georges Lemaitre proposed the theory of Big Bang
for the first time,” said the physicist Hannes Alfven (1908 – 1995). “Lemaitre
was both a
member of the Catholic hierarchy and an
accomplished scientist. He said in private that this theory was a way
to
reconcile science with St. Thomas Aquinas' theological dictum of
creation out
of nothing.” In 1951, in a speech before the
Pontifical Academy of Sciences, Pope Pius XII offered his enthusiastic
endorsement: "It
would seem that present-day science, with one stroke across the
centuries, has succeeded in bearing witness to the august instant of
the
primordial Fiat Lux, when along with
matter, there burst forth from nothing a sea of light and radiation,
and the
elements split and churned and formed into millions of galaxies." The
Pope went on to conclude that Big Bang proved the existence of God:
“Thus, with that concreteness which is
characteristic of physical proofs, science has confirmed the
contingency of the
universe and also the well-founded deduction as to the epoch when the
world
came forth from the hands of the Creator. Hence, creation took place.
We say:
therefore, there is a Creator.” In 1978 the cosmologist Professor
Stephen
Hawking (*1942) visited the Vatican to
receive the Pius XI Medal from the Pontifical Academy of
Science.
In
his book A History of Time, Hawking claims that Pope
John Paul II tried to discourage him and other scientists from trying
to figure out how the universe began. “I
was glad then,” Hawking said, “that he did not know the subject of the talk I had just given
at the
conference – the possibility that space-time was finite but had no
boundary, which means that it had no beginning, no moment of creation.''
In that alleged lecture, Stephen Hawking brought
forward the scenario
of a universe
expanding
from Big Bang towards a maximum and then falling back into the “big crunch” without actually doing
either. Instead of a linear progression, he proposed a permanent
one-off where the whole process is laid out and
suspended in a
dimension of simultaneous occurrences beyond our cognitive categories
of time
and space. “The quantum theory of gravity
has opened up a new possibility,” he argued, “in which
there would be no boundary to
space-time and so there would be no need to specify the behavior at the
boundary. One could say: ‘The boundary condition of the universe is
that it has
no boundary.’ The universe would be completely self-contained and not
affected
by anything outside itself. It would neither be created nor destroyed.
It would
just be.” It was the first time that I read
something remotely appealing about this ugly idea of Big Bang. In
Hawking’s analogy the Universe expands from the pole – symbolizing Big
Bang – towards the equator, and further on shrinks back to the point of
collapse at the other pole. Yet we continue on our travel, reach again
the equator and then the opposite pole, and so on, indefinitely.
There is no beginning and no end. “If the laws of
physics could break down at the beginning of the universe, why couldn’t
they break down anywhere? To admit a singularity is to deny a universal
predictability to physics, and, hence ultimately, to reject the
competency of science to understand the universe.” That is an
interesting statement by the very man who made a career out of the
research of black holes, which are physical singularities by
definition. The Universe “if
completely
self-contained, having no
boundary or edge,” would have “neither
beginning nor end: what place, then, for a creator.”
When Professor
Hawking is saying that space-time has no boundary he didn’t, however,
mean to say
the
Universe is infinite; at least to me the idea that a hamster can run in
his
wheel forever without ever hitting an obstacle, has nothing to do with
infinity. Georg Cantor (1845
– 1918) has made us understand that infinite
sets possess an actual, albeit infinite number of members and that
various
infinite
sets can vary in size. Any section – for instance the prime numbers
– out of an infinite number has as many members as the collection as a
whole. Infinite sets are as
complete as any set of finite
integers and yet as "countable" as is every set that can be put in a
one to one correspondence with other sets of integers.
In
other words, “infinity” is not simply an ever-growing progression. It
is complete and immediately present.
I am not a physicist; I grew up with
Immanuel Kant’s
contention that we are incapable of intuitively
comprehending
the true nature of time and space. The empirical world beyond our
senses, does
not know of “order” and “chaos.” These terms are cognitive categories
to which
we must seek an approximation in the world out there. Space, Kant
explained, “is merely a form of intuition for the
external, but not the real object in itself; it is not physically
correlated to
the phenomena.” This means that even our mathematical tools are
drawn a priory from our capacity to work out categorizations – “scales”
– as the receptacles for the empirical data at hand. Math is like using
a balance to weigh your grocery. As in the advert, “everything begins with an idea.”
Science is the story of hunches put to the test. By slotting in into
our premise the empirical data, we consider it a proof for the validity
of the fact if the assumption leads to a fitting conclusion. Yet even
without the support of empirical evidence, an idea may still be
ontologically valid if it is mathematically sound. Descartes observed
that we can know everything there is to know about triangles, but this
doesn’t guarantee the occurrence of a real life triangle out there. But
should there be real life triangles, they will be exactly as our math
is predicting them. It is the method of the testing that is the arbiter
for the validity of an idea. But the story how we stumble over our
ideas is a messy affair and riddled with detours, blind alleys, and the
pitfalls of ill applied logic. I am not much
of a believer in anything, but as far as I am concerned, the more
complicated the explanation, the larger
the margin for error.
We know of course exactly how
old the Universe is. According to Johannes Kepler (1571
– 1630) the Old Potter opened for business on
Sunday, the 27th of April in 3877 BC, at 11.00 am, central European
time. Drinks were on the house. Who knows the Universe may be the
latest model from a whole assembly line of discarded prototypes! This
world – complete with the light reaching us from the galaxies in the
Virgo cluster apparently after billions of years, with fossils of
dinosaurs hidden in the rocks, with Professor Hawking lecturing the
Vatican on a Universe without origin, and with me typing at this essay
and recalling that only yesterday I’d arrived in Singapore after twelve
hours on the plane – could have sprung into
existence five seconds ago, and we wouldn’t be any the wiser for it.
Opinions remain divided whether the Old Potter merely dropped
the ball
for the kickoff and then withdrew to the terraces for tea and scones,
or actually remained on the grounds for a spot of umpiring. These
“grounds” seem to cover an awful lot of empty space; in the larger
scheme of things, all our ingenious string theories and quantum
mechanics are a mere glitch, barely a blip on the scale. Yet even
“empty” space is a mathematical manifold with intrinsic metrics. The
physical properties of mass, charge and velocity of objects in space
correlate with these metrical values. Ptolemy (87
– 150 AD) – yes that Ptolemy, the one who placed Earth at
the center of the Universe – understood already that space is not an
entity
separate from matter. Based on this Albert Einstein
(1879 – 1955)
postulated that the element of time has to be included too, and
referred to
what is out there as the “Space-Time-Continuum”
or “space-time.” A continuum that
seems to be expanding!
In 1929, Edwin Hubble (1889
– 1953) noticed a uniform shift towards red in
the light-signature of galaxies and clusters at extreme cosmic
distances. Since the light arriving from an object moving through deep
space is either shifted towards blue when it approaches – like the
Andromeda galaxy – or towards red when it hurries away, the likely
explanation seems a universal motion away from the observer. The more
distant the object, the more seems the escape velocity to increase. The
factor of this increase is called the Hubble constant. When it was
discovered "in 1926, it had a value of 500
kilometers per
second per mega-parsec” (Halton Arp). Which prompted Halton
Arp to make the sarcastic remark: “During the past half-century this
variable has gradually declined to 50.3 kilometers per second per
mega-parsec.
The radius of the Universe is inversely proportional to the magnitude
of this
variable. Accordingly the Universe is expanding by a factor of 100 per
century.
Dividing this factor into the above ratio discloses that the expansion
began
here on Earth 961 years ago, or 1015 AD during the dark ages” (Halton
Arp, 'Extragalactic Astronomy', Science, 17 Dec. 1971, vol. 174, p.
1189). That sounds absurd, yet we may be sitting
at the center of this apparent “expansion,” for a good reason, but it
is not a reason supporting Big Bang.
As
long as the boundaries of the Universe exceed the observer’s horizon,
any observer’s horizon, no matter where he is located, whether here or
in one of the Sloan Galaxies, such observer
occupies
the center of his observational horizon. There
is no preference of one
observer
over the other; all observers are equal in that they occupy the center
of their
observational horizon.
In
a very
much larger Universe, let alone in an infinite Universe, the tidal
force from
“outside” of every observer’s horizon must by far exceed the
gravitational pull
from “inside” the horizon. In other words, the light-signature of
objects
closer to the observational horizon should be uniformly shifted towards
red,
and the Hubble constant rather stands for the value of gravitational
pull from
the observational horizon’s outside, than for an inert escape velocity. The current value for the Hubble
constant is seventy kilometers per second per mega-parsec, “with an
uncertainty of ten percent.” This means that a galaxy appears to be
moving
160,000 miles per hour faster for every 3.3 million light-years
distance from
Earth. If this were to indicate an
expansion, the Universe would be rapidly dispersing into an
ever-thinner cloud
of nothing, leaving behind merely the debris of microwaves.
The
theorists of
Big Bang like to present this debris as the fossil signature of the
initial
bang. For them it is the clincher for their theory but it would be
difficult to
concoct any alternative cosmology without some or other form of
radiation in
the background. In fact the very
presence
of this radiation should put a question mark on Big Bang. No matter
into what
direction we look, the background temperature is pretty much the same
everywhere,
roughly 3º Kelvin with very minor fluctuations, but if we go by
the assumption
that a big bang actually had occurred, then not enough time has elapsed
since
this event for radiation to zip across the Universe and level out at
the same
universal average.
An
affirmation of Big Bang would also require the Universe to look
different in the past. There should be noticeably fewer heavy elements
in the
spectrum of ancient stars. Yet Galaxies from twelve billion years ago
show the
familiar distribution of stellar ages and a similar spectrum of
chemical
elements just like our Milky Way. As recent as January 2004, the
American
Astronomical Society confirmed that the Universe of billions of years
ago and
in distances marked by high red shift in the spectrum is of a very
similar
composition than our cosmic neighborhood. The observed superabundance
of
deuterium, helium-3, helium-4, and lithium-7, may have been the product
of a
more “local” collision between regions of matter and antimatter each
exceeding
the size of the observed Universe. According to the Nobel laureate
Hannes Alfven
this would create a superheated state and a rapid expansion of the
debris into
the space surrounding the area of annihilation, giving cause to nuclear
synthesis. The model does not invoke any exotic physics and employs
well-understood electromagnetic forces and gravity. (When I hear the
term “dark
matter” I feel a sensation of smelling burning flesh.)
The
first real scientist taking infinity
seriously was Sir Isaac Newton (1642 –
1727). In his private notes
Newton had anticipated much of Albert Einstein:
"Are not gross Bodies and Light convertible into one another, and
may
not Bodies receive much of the Activity from the Particles of Light
which enter
the Composition?" I don’t know about you, but this is hitting
pretty
close
to Einstein’s E=mv2
(energy
equals mass by the
square power of light
velocity). Sir Isaac even
speculated, that "another force, independent of gravity, magnetism,
and
electricity, might prevail only at the smallest distances;" a truly
eerie insight for a man from a century with horse manure piling up in
every
corner. In his publications however, he placed his reputation on
Kepler's three
laws of planetary motion. Newton’s
resulting law of gravity suggested to him a world, ultimately
collapsing on itself, (if not compensated by expansion). So to prevent
this
from happening, Newton’s celestial mechanics require a homogeneous
Universe
stretching into infinity. Professor Hawking in his book
has brushed this aside, claiming, that even so all matter would
ultimately coalesce and collapse into one dense mass. An example for
Homer
caught napping. After all, it was Professor Hawking himself, who had
proven
that even black holes eventually must evaporate, in other words, have a
limited
lifespan – which in an infinite Universe can only mean that some may
not
make the distance towards the crunch point. The imperial astrologer
Johannes Kepler
thought he had a better
argument against infinity; it became later known as “Olber’s Paradox.”
In
his novel Conversations
with the Starry Messenger
from 1610, the first piece of SF fiction known to history, Kepler
wrote: “In
an infinite Universe every line of vision must end on the surface of a
star.
Would this not make the whole celestial vault as luminous as the Sun?"
Kepler was as bright as Newton
or Professor Hawking. Still writing by candlelight, it must have
occurred to
him that even an infinite number of candles do not burn all the time. In 1676 Ole
Roemer (1644 –
1710)
calculated a good approximation for the speed of light, and in 1901
Lord Kelvin (1824
– 1907) made the crucial
step of expressing distances to stars in terms of their light
signature’s
travel time. In his paper On Ether and Gravitational Matter through
Infinite
Space, Lord Kelvin picked up on a suggestion by the poet Edgar
Allen Poe,
and pointed out that a star's lifetime is limited by it's available
energy
resources. As we look out into space, we also look back in time, to the
darkness that existed before the birth of a luminous body and to the
darkness
that followed its expiration. Modern estimates of the distance of
luminous
bodies in the cosmic background give a value of
1023 light
years,
meaning that in order to see a star’s emissions on every line of sight,
such
star must have been shining for at least 10 to the power of 23 years.
But the
lifetime of a sun-like star is only 1010 years. In
other
words the
answer to the question where all the starlight has gone is, that it
hasn't
reached us yet, and some never will before our own solar system has
expired.
Even with all
eternity available, in order to convene, the most distant objects will
never
arrive at the crunch point before they expire and disperse as
microwaves; in a
manner of speaking, there is just too much Universe. Of all
possible
explanations why and how in an infinite Universe the sky is dark at
night
– there are several I am aware of – this is the one with the fewest
theoretical assumptions. Therefore “there
is no rational reason to doubt that the universe has existed for an
infinite
time. Only myths attempt to say how the universe came about, either
4,000 or
twenty billion years ago,” says Hannes Alfven.
It is a world where the number of transcendental numbers –
values such as pi and e – is very much larger than the total of
integers and the values of rare constants stand out from the chaos of
random numbers like the nodes marking the intervals on a musical string
instrument.
So what is really out there? I mean, what is out there when
nobody is looking and slotting in things into his cognitive spider net
of categories and instincts? What do we mean when we use the term
“time?” To us, “time,” manifests itself as a linear progression with
one direction, from the past to the future, from birth to death. We can
neither retract our steps, nor return to a time before we were born.
Or can we? Physicists
use the term
“entropy” to categorize the irretrievable consumption of energy. In their parlance, they
have a loose way to identify the degree of entropy with a state of
order or
disorder. Yet what really happens is that energy is burned whether we
wage war
or build a palace; the result is exactly the same: an increase in
entropy. Entropy
is quantified in units of energy per units of temperature. In a
locomotive the
steam pushes a piston until the energy from the fuel heating the water
in the
boiler is consumed. There is no viable way to reclaim the residual heat
dispersed into the environment after the steam has done its work.
Entropy has
increased. Energy spent is spent for good. According to the second law
of thermodynamics, the entropy of
the
entire Universe is moving towards “a
maximum" (Rudolf Clausius,
1822 – 1888). Maybe what we call “time” is just an expression
for
entropy?
The mathematician Kurt
Gödel (1906
– 1978) is best known for his
theorems of
incompleteness: “For any consistent
formal theory that proves arithmetic truths, there is an arithmetical
statement
that is true, but not provable by the theory.”
In his private
correspondence, Gödel
argued at length for a belief in an afterlife: “I am
convinced of the afterlife, independent of theology.”
The
operative words here are “if” and “must.” Gödel liked to think
that “the world in which we live is not the only
one in which we shall live or have lived.” I’ve heard the same
thing from
an elderly lady, waiting for her train on platform four of Waterloo
Station. Einstein's
field equations
contain a
fudge factor, a “cosmological constant.” The actual value of this
constant is
still everybody’s guess and, depending which value we prefer, allows
for
multiple solutions of the equations. Einstein himself later denounced
this
introduction of lambda as the “biggest
mistake of my life.” In 1949, Kurt Gödel
tweaked the value of lambda to the extent that he could propose a
spinning Universe with no singularities but allowing for time travel.
Since there is no
“outside” to the Universe, nobody “inside,” for lack of a point of
reference, will ever notice the spin. Except we consider the inert
effects of gravity. For instance on Earth the rotational velocity
increases from zero at the poles to a speed of 1,500 km per hour on the
equator, slightly pulling the planet out of its spherical shape. On a
cosmic scale, this means that the rotational velocity at the "cosmic
pole" has to be zero as well, while the increase towards the "equator"
must affect the overall distribution of matter, very similar to the
distribution of the bands of cloud formations and of weather systems on
Jupiter. There are tantalizing clues right before our telescopes. The
huge void of the “WMAP Cold Spot” could very well be the equivalent of
a “cosmic pole,” only it isn’t actually that void. Recent long-range
surveys from the Hubble telescope have been pinpointed at apparently
void regions in the most distant expanses. These long exposures reveal
the existence of a crowded world of galactic clusters too far away to
be picked up in a normal sweep even by Hubble. Closer to the equator,
matter should accumulate, stretching in bands along the latitudes. The
“cosmic walls” in our telescopes – galaxies and clusters of galaxies,
strung out a billion light-years across and streaming along at
velocities that approach 1,000 kilometers per second may just fit the
description. Some 150 to 250 million light-years away, there is the
“Great Attractor,” a gravity anomaly within the range of the Centaurus
Supercluster revealing the existence of a localized concentration of
mass equivalent to tens of thousands of Milky Ways. It is observable by
its effect on the motion of galaxies and their associated clusters over
a region hundreds of millions of light years across. In 2003, a survey
by the ROSAT x-ray satellite revealed another concentration of matter
some twelve billion light years end to end. Who is to say this could
not be the effect of a cosmic spin? And since in a spinning Universe
the velocity of every region along one of the "cosmic latitudes" must
vary from the other regions above and below, traveling at angles to
other worlds along the cosmic longitudes should enable us to tunnel
through time which is spinning forward along the latitudes; yet this
was not what Gödel was after. "If one can travel to
other worlds of a
different time," Gödel asked, "how can time be the
passage from a no longer existing past to a not yet
existing future, when the physics of a spinning Universe require a form
of
“eternalism,” where the future is a foregone affair and the past
embedded in
the present because all points in time are equally valid frames of
reference –
or equally real." In Gödel’s Universe this has consequences
for the
entropy of matter and perhaps even for the second law of
thermodynamics; in
fact the implications may go much further: instead of going from the
past into
the future in a straight line, the two events are rolled together in a
closed
time-like curve (CTC) tying together every event in space-time, past
present
and future simultaneously. For Gödel this anomaly was the crucial
point of his
suggestion, and whatever it meant to Gödel himself, he arguably
succeeded in
proving that Einstein's equations of space-time are not consistent with
what we
intuitively understand time to be.
Einstein was generous
enough to acknowledge that his friend had raised
new and disturbing questions about the nature of time. Since then
physicists
have tried without success to challenge Gödel's physics or at
least find a
missing element in relativity itself that would rule out the
applicability of
Gödel's results.
Based on
these physics Robert Heinlein wrote the short story All
You Zombies. Jane is a baby girl, left abandoned at an
orphanage in Cleveland in 1945. Never knowing her parents, Jane grows
up and
one day in 1963 she falls in love with a drifter. She becomes pregnant
after
which the man goes missing. During the delivery, doctors find that Jane
has
both sets of sex organs, and to save her life, they are forced to
surgically
change her gender. During the procedure, a mysterious stranger kidnaps
Jane’s
baby from the delivery room. Jane, now a "he," takes to the bottle
and goes on the road. After years of drifting, in 1970, Jane enters a
lonely
bar and tells his story to the elderly bartender. The bartender offers
an
explanation and invites Jane to go with him on a ride with a time
machine,
dropping him off in 1963. Jane is falling in love with a young woman
without
family; the young woman becomes pregnant. The bartender with his time
machine
then goes forward nine months, kidnaps the baby girl from the hospital,
and
drops off the baby in an orphanage back in 1945. Then the bartender
gives the
by now thoroughly confused Jane a ride to 1985. Jane eventually is
getting his
life together, builds a time machine and takes on a job as a bartender
back in
Pop’s Place in 1970. By now the reader knows that the story is all
about the
same person, a person that theoretically can never die, although she
may attend
her own funeral.
I hear Gödel’s
solution has been
dismissed, because it doesn’t allow for cosmic expansion. But the
supposed
telltale sign for expansion, the increasing red-shift of distant
objects, can be explained in many ways, even as the effect of the
increased rotational velocities
nearer to the
“equator” of the Universe. In this case we would know that our own
position in
the Cosmos is somewhat removed from the cosmic equator. There is also a
strange element of immediacy in the distribution of matter.
In 1927 Werner Heisenberg (1901
– 1976)
had stated that short light-waves of high energy measure the location
of an
electron with a certain degree of precision, yet the procedure will
severely
disturb the electron's impulse. Measuring the impulse of an electron
with a
longer light-wave will leave the impulse less disturbed, since
long-waved light
contains less energy, but then the electron's location eludes precise
measurement. From this Heisenberg drew the conclusion of a fundamental
uncertainty in the correlation between impulse and location. A precise
simultaneous measurement of location and impulse is just not possible,
because
the measuring light wave can only be short or long, not both at the
same time. In
other words, the physical correlation between impulse and position
ceases to
exist because the agent we use to measure it interferes and in the
process
destroys one of the two data.
The
philosophical question here
is: if a measurement is not even possible how are we to justify the
stipulation
that there is a correlation?
The answer should be simple! There is nothing to prevent us
from choosing
to measure either of the two data in this correlation and we will
always get a
result. Yet the fact that this choice is entirely up to our initiative
has
mislead some sane and formidable physicists like the late John Wheeler (1911 – 2008) and Eugene Wigner (1902
– 1995) to
speculate about a “Participatory
Universe.” Obviously this is not the case. If we
were really
“participators bringing into being not only the near and here but the
far away
and long ago,” it should enable us to erase Auschwitz from the
records.
Merlin would return from his grave. This is just another flirt with the
irrational, and I
am not the only one with strong feelings about this.
The Austrian Nobel Laureate Erwin Schrödinger (1887 – 1961) devoted his entire working life to explain the movement of
electrons in terms of waves. He demonstrated that these electron-waves
don't
even move. They are stationary. (Atoms don’t look at all like the
little solar
systems in Rutherford’s model; when IBM published an image of their
logo
written in iron atoms, it looked more like an arrangement of little
mountains.)
Each time you check the position of an electron you will find it in a
different
place, but that doesn't mean that it is moving in between the checks.
It is the
checking that moves the electron, or rather “collapses” its
wave-signature at a
certain point. The equation describing this process became known as
Schrödinger's wave function. "In
this article,” Schrödinger wrote, “I
should like to show, for the simplest case
of the (non-relativistic and unperturbed) hydrogen atom, that the usual
rule
for quantization can be replaced by another requirement in which there
is no
longer any mention of 'integers.' The integral property follows,
rather, in the
same natural way that, say, the number of nodes of a vibrating string
must be
an integer. The new interpretation can be generalized and, I believe,
strikes
very deep into the true nature of quantum mechanics" (E.
Schrödinger,
Annals of Physics 1926, 79, 361.).
Schrödinger came to the conclusion that a subatomic particle such
as an electron exists simultaneously in a number of possible states;
the probability of each is incorporated in Schrödinger’s wave
function. Common sense would reason that at any given point in time
there are only two possibilities, either the atom has decayed, or it
has not. Yet quantum mechanics is telling a different story: the atom
is understood to
inhabit both
states simultaneously before it is observed.
This has been put
to the
test.
A team of physicists – Christopher Monroe, Dawn
Meekhof, Brian King and Dave Wineland – confined a charged beryllium
atom
in a tiny electromagnetic cage and then cooled it with a laser to its
lowest
energy state. In this state the position of the atom and its "spin"
(a quantum property that is only metaphorically analogous to spin in
the
ordinary sense) could be ascertained within a very high degree of
accuracy,
though limited by Heisenberg's uncertainty principle. The next step was
to
stimulate the atom with a laser just enough to change its wave
function.
According to the new wave function of the atom, it now had a fifty
percent
probability of being in a "spin-up" state in its initial position and
an equal probability of being in a "spin-down" state in a position as
much as eighty nanometers away, which is a vast distance in the atomic
realm.
And lo and behold, the atom was indeed in two different places at the
same time
as well as in two different spin states. The piece of clinching
evidence was
the observation of an interference pattern.
It is a telltale sign that the single beryllium atom had
produced two distinct wave functions, which now interfered with each
other. It
is a bit like in the koan of the Zen master: “Where does
the lake go when the geese fly to Canada?” Such instant
interference between multiple manifestations of the same object could
even put
a new angle on the EPR paradox.
Albert Einstein was a great skeptic when it came to the
Copenhagen Interpretation of quantum physics. To lampoon the concept he
and the physicists Boris Podolsky and Nathan Rosen devised a famous
thought experiment: “It is possible,” they
argued, “to obtain a pair of particles,
say electrons, in a so-called singlet state where their spins cancel
out each
other to give a total spin of zero. Let us suppose these particles move
widely
apart in opposite directions, after which the spin of the particle to
the left
is measured and found to be in the “up” state. Because the two spins
must
cancel each other out to zero, it follows the particle to the right
must have “down”
spin. In
classical physics, this would be no problem at all. One would just
conclude
that the right particle always had “down” spin from the time of
separation.
However according to the Copenhagen interpretation, the spin of the
particle to
the left has no definitive value until it is measured, at which point
it must
produce an instantaneous effect at the particle to the right,
collapsing its
spin wave function into the opposite or “down” state.” Einstein
concluded:
“This bizarre situation demands
action-at-a-distance or faster than light communication, neither of
which is
acceptable.”
Einstein thought he had made his point. Nevertheless, in
1964 John S. Bell proposed his “non-locality”
theorem. He accepted Einstein’s ridicule as a serious proposition and
if he was
right, this would mean there is such a thing as instant interaction
regardless,
even, of distance. Therefore, in 1982, Alain Aspect set into practice
what
Einstein had merely suggested to ridicule the idea.
As prescribed by Bell, the experiment polarized identically
a pair of photons and then emitted it into opposite directions from a
single
light source at the center. Each photon passed through a polarized
filter of
which the angle was rapidly varied. Using quantum mechanics one can
predict the
probability that each photon will pass through a filter tilted at a
given
angle. Yet according to the same theory, the probability of one photon
passing
through depends on how both filters
are tilted. Aspect made
sure that the filters were sufficiently apart, and that their
reorientation was
varied quick enough, so that no signal from one end could reach the
other in
time to affect the second measurement, even if the signal traveled at
the speed
of light. In fact, Aspect changed the initial spin every ten billionth
of a
second, and made measurements on the opposite particles when they were
separated by four times the distance that light could travel in the
interval
between the alterations of the spin. The results were as predicted by
quantum
mechanics.
Some interactions in the particle-world are immediate and
don’t
diminish with distance. Such immediacy is also a feature of
infinity. Meister Eckhard (1260
– 1328) was the first to suggest a world where every event is
laid
out simultaneously in time-withdrawn permanence.
© –
7/11/2009 – by michael sympson, 5,600 words, all rights reserved