Journal of Statistical Physics

, Volume 125, Issue 5–6, pp 1183–1192 | Cite as

Dissipation and Decoherence in a Quantum Oscillator

  • Vinay Ambegaokar


The time development of the reduced density matrix for a quantum oscillator damped by coupling it to an ohmic environment is calculated via an identity of the Debye-Waller form. Results obtained some years ago by Hakim and the author in the free-particle limit(10) are thus recovered. The evolution of a free particle in a prepared initial state is examined, and a previously published exchange(5,9) is illuminated with figures showing no decoherence without dissipation.

Key Words

Quantum oscillator dissipation time evolution of reduced density matrix Debye-Waller identity Decoherence no decoherence without dissipation 


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Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  • Vinay Ambegaokar
    • 1
  1. 1.Laboratory of Atomic and Solid State PhysicsCornell UniversityIthaca

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