Intrinsic time-uncertainties and decoherence: comparison of 4 models

Diósi, Lajos

doi:10.1590/s0103-97332005000200009

Cited by 58 publications

(76 citation statements)

References 30 publications

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“…While the physical mechanisms causing decoherence are fundamentally different in the two models, the resulting predictions for the decoherence rate are basically identical [24]. We will refer to this model as the Diósi-Penrose (DP) model.…”

Section: What Are the Limits Of Quantum Theory?mentioning

confidence: 99%

Macroscopic quantum resonators (MAQRO)

Hechenblaikner²,

et al. 2012

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Quantum physics challenges our understanding of the nature of physical reality and of space-time and suggests the necessity of radical revisions of their underlying concepts. Experimental tests of quantum phenomena involving massive macroscopic objects would provide novel insights into these fundamental questions. Making use of the unique environment provided by space, MAQRO aims at investigating this largely unexplored realm of macroscopic quantum physics. MAQRO has originally been proposed as a medium-sized fundamental-science space mission for the 2010 call of Cosmic Vision. MAQRO unites two experiments: DECIDE (DECoherence In Double-Slit Experiments) and CASE (Comparative Acceleration Sensing Experiment). The main scientific objective of MAQRO, which is addressed by the experiment DECIDE, is to test the predictions of quantum theory for quantum superpositions of macroscopic objects containing more than 10 8 atoms. Under these conditions, deviations due to various suggested alternative models to quantum theory would become visible. These models have been suggested to harmonize the paradoxical quantum phenomena both with the classical macroscopic world and with our notion of Minkowski space-time. second scientific objective of MAQRO, which is addressed by the experiment CASE, is to demonstrate the performance of a novel type of inertial sensor based on optically trapped microspheres. CASE is a technology demonstrator that shows how the modular design of DECIDE allows to easily incorporate it with other missions that have compatible requirements in terms of spacecraft and orbit. CASE can, at the same time, serve as a test bench for the weak equivalence principle, i.e., the universality of free fall with test-masses differing in their mass by 7 orders of magnitude.

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Section: What Are the Limits Of Quantum Theory?mentioning

confidence: 99%

Macroscopic quantum resonators (MAQRO)

Hechenblaikner²,

et al. 2012

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“…, which is expected to be in the order 3 In all following calculations x is assumed to be 1. of 1 (Christian, 2005)) defines a measure how much the space-time geometries of the States 1 and 2 differ from each other (Penrose, 1996;Diósi, 1989Diósi, & 2005. If the superposition consists of a rigid mass at different locations, equation (1) expresses the mechanical work, which is needed to separate the masses from each other under the assumption that gravitation acts between them.…”

Section: Modelmentioning

confidence: 99%

Quantum State Reduction by a Physical Interaction Between the States and its Perspective for Biology

Quandt-Wiese¹

2009

Neuroquantology

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A phenomenological model for the calculation of reduction probabilities of a superposition of several states is presented, which bases only the idea that quantum state reduction has its origin in a physical interaction between the states. The model is explicitly worked out for the hypothesis of gravity-induced quantum state reduction. It agrees for typical quantum mechanical experiments with the projection postulate and predicts regimes in which other behaviour could be observed. For verification a feasible quantum-optical experiment is proposed. An outlook on the possible role of state reduction for biology is given by exemplarily discussing mutation effects of bacteria.

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“…Although the framework of Diósi and Penrose are distinct, both draw a similar conclusion concerning the collapse mechanism. For a review of four gravity-driven decoherence models including these two, the interested reader is directed to [18]. Additionally, a resurgence of work involving the Schrödinger-Newton equations [19,20] has sought to further the investigations of gravity's role in state vector evolution.…”

Section: Gravitationally-induced Collapse: Objective Reduction (Or)mentioning

confidence: 99%

“…It should finally be noted that variation of the gravitational constant impacts any gravity-driven collapse mechanism (e.g. see [18]), irrespective of the existence of extra dimensions.…”

Section: Time Variation Of the Gravitational Constantmentioning

confidence: 99%

Gravitationally induced quantum superposition reduction with large extra dimensions

Mureika

2006

Phys. Rev. D

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A gravity-driven mechanism ("objective reduction") proposed to explain quantum state reduction is analyzed in light of the possible existence of large extra dimensions in the ADD scenario. By calculating order-of-magnitude estimates for nucleon superpositions, it is shown that if the mechanism at question is correct, constraints may be placed on the number and size of extra dimensions. Hence, measurement of superposition collapse times (e.g. through diffraction or reflection experiments) could represent a new probe of extra dimensions. The influence of a time-dependent gravitational constant on the gravity-driven collapse scheme with and without the presence of extra dimensions is also discussed.

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Intrinsic time-uncertainties and decoherence: comparison of 4 models

Cited by 58 publications

References 30 publications

Macroscopic quantum resonators (MAQRO)

Macroscopic quantum resonators (MAQRO)

Quantum State Reduction by a Physical Interaction Between the States and its Perspective for Biology

Gravitationally induced quantum superposition reduction with large extra dimensions

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