Jack Sarfatti VIdeos on Physics

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Details: Category: Science News Archive (2015); Published: 23 June 2015

Background from a recent paper by Huw Price and Ken Wharton:

"Late in his life, Einstein told Max Born that he couldn't take quantum

mechanics seriously, \because it cannot be reconciled with the idea that

physics should represent a reality in time and space, free from spooky actions at a distance."[1] Most physicists think of this as the sad lament of an old giant, beached on the wrong side of history { unable to accept the revolution in physics that he himself had done so much to foment, decades before, with his 1905 discovery that light is absorbed in discrete "quanta".

Huw Price Trinity College, Cambridge CB2 1TQ, UK; email This email address is being protected from spambots. You need JavaScript enabled to view it..

Ken Wharton Department of Physics and Astronomy, San Jose State University, San Jose, CA

95192-0106, USA; email This email address is being protected from spambots. You need JavaScript enabled to view it..

arXiv:1307.7744v1 [physics.hist-ph] 29 Jul 2013

"According to this orthodox view, John Bell put the nail in the

coffin of the dream of a spook-free successor to quantum theory, a decade

after Einstein's death. Bell's Theorem seemed to show that any theory of

the kind Einstein hoped for { an addition to quantum theory, describing

an underlying "reality in space and time" { is bound to involve the kind of

"action at a distance", or "nonlocality", to which Einstein was objecting.

So Einstein's spooks have long seemed well-entrenched in the quantum

world { and this despite the fact that they still seem to threaten Einstein's

other great discovery from 1905, special relativity. As David Albert and

Rivka Galchen put it in a recent piece in Scientic American, writing about

the intuition of "locality": "Quantum mechanics has upended many an in-

tuition, but none deeper than this one. And this particular upending carries

with it a threat, as yet unresolved, to special relativity|a foundation stone

of our 21st-century physics."[2]

But could this accepted wisdom be due for a shake-up? Could Einstein

have the last laugh after all? Intriguingly, it turns out there's a new reason

for taking seriously a little-explored loophole in Bell's Theorem.1 Even more

intriguingly, it's a reason that Einstein himself could have spotted as early

as 1905, since it is a simple consequence of the quantization of light, together with another assumption that he certainly accepted at that time.

The loophole stems from the fact that Bell's argument assumes that our

measurement choices cannot in influence the past behaviour of the systems we choose to measure. This may seem quite uncontroversial. In the familiar world of our experience, after all, causation doesn't work "backwards".

But a few physicists have challenged this assumption, proposing theories

in which causation can run backwards in the quantum world. This idea {

"retrocausality", as it is often called { has been enjoying a small renaissance.

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