Decoherence at zero temperature

Abstract

Most discussions of decoherence in the literature consider the high-temperature regime but it is also known that, in the presence of dissipation, decoherence can occur even at zero temperature. Whereas most previous investigations all assumed initial decoupling of the quantum system and bath, we consider that the system and environment are entangled at all times. Here, we discuss decoherence for a free particle in an initial Schrödinger cat state. Memory effects are incorporated by use of the single relaxation time model (since the oft-used Ohmic model does not give physically correct results).

References in corpus (4)

• Exact solution of the Hu-Paz-Zhang master equation
• Quantum measurement and decoherence
• Decoherence without dissipation
• Wave Packet Spreading: Temperature and Squeezing Effects with Applications to Quantum Measurement and Decoherence

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• Analytical evaluation of the coefficients of the Hu-Paz-Zhang master equation: Ohmic spectral density, zero temperature, and consistency check
• Initial correlations effects on decoherence at zero temperature
• Reply to Comment on "Quantum Measurement and Decoherence"
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• Quantum Zeno and anti-Zeno effects in surface diffusion of interacting adsorbates
• Fluctuations and Noise: A General Model with Applications