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Collisional decoherence reexamined
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Collisional decoherence reexamined
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We re-derive the quantum master equation for the decoherence of a massive Brownian particle due to collisions with the lighter particles from a thermal environment. Our careful treatment avoids the occurrence of squares of Dirac delta functions. It leads to a decoherence rate which is smaller by a factor of 2 pi compared to previous findings. This result, which is in agreement with recent experiments, is confirmed by both a physical analysis of the problem and by a perturbative calculation in the weak coupling limit.
Forward citations
Cited by 2 Pith papers
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Gravitationally Induced Quantum Decoherence of Macroscopic Objects
Gravitational decoherence of macroscopic objects in Newtonian gravity accumulates logarithmically over distances but remains subdominant to collisional decoherence.
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Matter-Wave Interferometers as Open-System Dark Matter Detectors
The paper formulates dark matter detection in matter-wave interferometers as an open-system problem using Schwinger-Keldysh effective field theory, revealing channel asymmetries and Bose/Pauli factors for elastic scattering.
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