0401086v1

related topics
{particle, mechanics, theory}
{temperature, thermal, energy}
{energy, gaussian, time}
{wave, scattering, interference}
{state, phys, rev}
{theory, mechanics, state}
{measurement, state, measurements}
{force, casimir, field}
{photon, photons, single}
{time, decoherence, evolution}
{classical, space, random}
{field, particle, equation}
{bell, inequality, local}
{entanglement, phys, rev}
{time, wave, function}

Gravitational self-localization in quantum measurement

Tamas Geszti

abstract: Within Newton-Schr\"odinger quantum mechanics which allows gravitational self-interaction, it is shown that a no-split no-collapse measurement scenario is possible. A macroscopic pointer moves at low acceleration, controlled by the Ehrenfest-averaged force acting on it. That makes classicality self-sustaining, resolves Everett's paradox, and outlines a way to spontaneous emergence of quantum randomness. Numerical estimates indicate that enhanced short-range gravitational forces are needed for the scenario to work. The scheme fails to explain quantum nonlocality, including two-detector anticorrelations, which points towards the need of a nonlocal modification of the Newton-Schr\"odinger coupling scheme.

oai_identifier:
oai:arXiv.org:quant-ph/0401086
categories:
quant-ph gr-qc
comments:
Accepted for publication in Physical Review A; extends and replaces quant-ph/0204036
doi:
10.1103/PhysRevA.69.032110
arxiv_id:
quant-ph/0401086
journal_ref:
Phys.Rev. A69 (2004) 032110
created:
2004-01-15

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