Intrinsic and Fundamental Decoherence: Issues and Problems

Abstract

We investigate the meaning of gravity-induced decoherence in quantum theory, known as `intrinsic' or `fundamental' decoherence in the literature. We explore a range of issues relevant to this problem, including the meaning of modified uncertainty relations, the interpretations of the Planck scale, the distinction between quantum and stochastic fluctuations and the role of the time variable in quantum mechanics. We examine the specific physical assumptions that enter into different approaches to the subject. In particular, we critique two representative approaches that identify time fluctuations as the origin of intrinsic or fundamental decoherence: one that models the fluctuations by stochastic process and one that purports to derive decoherence from the quantum fluctuations of real clocks.

16 pages

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Cited by in corpus (10)

• Effective Field Theory Approach to Gravitationally Induced Decoherence
• Gravitational Decoherence
• A Master Equation for Gravitational Decoherence: Probing the Textures of Spacetime
• Probing a Gravitational Cat State
• Quantum gravitational decoherence of light and matter
• Gravitational effects in macroscopic quantum systems: a first-principles analysis
• Gravitational decoherence of photons
• Environmental gravitational decoherence and a tensor noise model
• Self-gravitating Interferometry and Intrinsic Decoherence
• Are intrinsic decoherence models physical theories?