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Loss of quantum coherence from discrete quantum gravity

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Rodolfo Gambini1, Rafael A Porto1 and Jorge Pullin2

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LETTER TO THE EDITOR

We show that a recent proposal for the quantization of gravity based on discrete spacetime implies a modification of standard quantum mechanics that naturally leads to a loss of coherence in quantum states of the type discussed by Milburn. The proposal overcomes the energy conservation problem of previously proposed decoherence mechanisms stemming from quantum gravity. Mesoscopic quantum systems (as Bose–Einstein condensates) appear as the most promising testing grounds for an experimental verification of the mechanism.


PACS

04.60.Nc Lattice and discrete methods

04.60.Pp Loop quantum gravity, quantum geometry, spin foams

03.65.Yz Decoherence; open systems; quantum statistical methods

MSC

81Sxx General quantum mechanics and problems of quantization

83C27 Lattice gravity, Regge calculus and other discrete methods

83C45 Quantization of the gravitational field

Subjects

Gravitation and cosmology

Quantum information and quantum mechanics

Dates

Issue 8 (21 April 2004)

Received 26 September 2003

Published 16 March 2004



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