Ground state cooling is not possible given initial system-thermal bath factorization

Abstract

In this paper we prove that a fundamental constraint on the cooling dynamic implies that it is impossible to cool, via a unitary system-bath quantum evolution, a system that is embedded in a thermal environment down to its ground state, if the initial state is a factorized product of system and bath states. The latter is a crucial but artificial assumption often included in many descriptions of system-bath dynamics. The analogous conclusion holds for 'cooling' to any pure state of the system.

Comments are welcome

References in corpus (4)

• Atomic physics and quantum optics using superconducting circuits
• Theory of ground state cooling of a mechanical oscillator using dynamical back-action
• Resolved Sideband Cooling of a Micromechanical Oscillator
• A rate equation approach to cavity mediated laser cooling

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