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Jack Sarfatti

about a minute ago via Twitter

If someone points out to you that your pet theory of the universe is in disagreement with Maxwell's equations—then so much the worse for Maxwell's equations. If it is found to be contradicted by observation—well these experimentalists do bungle things sometimes. But if your theory is found to be against the second law of thermodynamics I can give you no hope; there is nothing for it but to collapse in deepest humiliation.

— Sir Arthur Stanley Eddington

Gifford Lectures (1927), The Nature of the Physical World (1928), 74

http://t.co/2VR1fByb allows delayed choice & faster-than-light entanglement signals (A.Valentini ) but violates2nd Law Thermodynamics

[1206.5485] Open timelike curves violate Heisenberg's uncertainty principle

lnkd.in/Gd5gT5

Open timelike curves violate Heisenberg's uncertainty principle

J.L. Pienaar, C.R. Myers, T.C. Ralph

(Submitted on 24 Jun 2012)

Toy models for quantum evolution in the presence of closed timelike curves (CTCs) have gained attention in the recent literature due to the strange effects they predict. The circuits that give rise to these effects appear quite abstract and contrived, as they require non-trivial interactions between the future and past which lead to infinitely recursive equations. We consider the special case in which there is no interaction inside the CTC, referred to as an open timelike curve (OTC), for which the only local effect is to increase the time elapsed by a clock carried by the system. Remarkably, circuits with access to OTCs are shown to violate Heisenberg's uncertainty principle, allowing perfect state discrimination and perfect cloning of coherent states. The model is extended to wave-packets and smoothly recovers standard quantum mechanics in an appropriate physical limit. The analogy with general relativistic time-dilation suggests that OTCs provide a novel alternative to existing proposals for the behaviour of quantum systems under gravity.

Subquantum Information and Computation

Antony Valentini

(Submitted on 11 Mar 2002 (v1), last revised 12 Apr 2002 (this version, v2))

It is argued that immense physical resources - for nonlocal communication, espionage, and exponentially-fast computation - are hidden from us by quantum noise, and that this noise is not fundamental but merely a property of an equilibrium state in which the universe happens to be at the present time. It is suggested that 'non-quantum' or nonequilibrium matter might exist today in the form of relic particles from the early universe. We describe how such matter could be detected and put to practical use. Nonequilibrium matter could be used to send instantaneous signals, to violate the uncertainty principle, to distinguish non-orthogonal quantum states without disturbing them, to eavesdrop on quantum key distribution, and to outpace quantum computation (solving NP-complete problems in polynomial time).

Comments: 10 pages, Latex, no figures. To appear in 'Proceedings of the Second Winter Institute on Foundations of Quantum Theory and Quantum Optics: Quantum Information Processing', ed. R. Ghosh(Indian Academy of Science, Bangalore, 2002). Second version: shortened at editor's request; extra material on outpacing quantum computation (solving NP-complete problems in polynomial time)

Subjects:

http://quantumtantra.blogspot.com/2012/05/its-wrong-but-it-feels-so-right.html

A violation of the uncertainty principle implies a violation of the second law of

thermodynamics

Esther Hänggi∗ and Stephanie Wehner†

Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, 117543 Singapore

(Dated: June 1, 2012)

Uncertainty relations state that there exist certain incompatible measurements, to which the

outcomes cannot be simultaneously predicted. While the exact incompatibility of quantum measurements

dictated by such uncertainty relations can be inferred from the mathematical formalism

of quantum theory, the question remains whether there is any more fundamental reason for the

uncertainty relations to have this exact form. What, if any, would be the operational consequences

if we were able to go beyond any of these uncertainty relations? We give a strong argument that

justifies uncertainty relations in quantum theory by showing that violating them implies that it is

also possible to violate the second law of thermodynamics. More precisely, we show that violating

the uncertainty relations in quantum mechanics leads to a thermodynamic cycle with positive net

work gain, which is very unlikely to exist in nature.

Category: MyBlog

Written by Jack Sarfatti

Published on Monday, 25 June 2012 17:00

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