0110088v2

related topics
{time, decoherence, evolution}
{time, systems, information}
{temperature, thermal, energy}
{entanglement, phys, rev}
{qubit, qubits, gate}
{state, states, entangled}
{let, theorem, proof}
{states, state, optimal}
{information, entropy, channel}
{cos, sin, state}
{measurement, state, measurements}
{observables, space, algebra}
{alice, bob, state}
{phase, path, phys}

Thermalizing Quantum Machines: Dissipation and Entanglement

Valerio Scarani, Mario Ziman, Peter Stelmachovic, Nicolas Gisin, Vladimir Buzek

abstract: We study the relaxation of a quantum system towards the thermal equilibrium using tools developed within the context of quantum information theory. We consider a model in which the system is a qubit, and reaches equilibrium after several successive two-qubit interactions (thermalizing machines) with qubits of a reservoir. We characterize completely the family of thermalizing machines. The model shows a tight link between dissipation, fluctuations, and the maximal entanglement that can be generated by the machines. The interplay of quantum and classical information processes that give rise to practical irreversibility is discussed.

oai_identifier:
oai:arXiv.org:quant-ph/0110088
categories:
quant-ph
comments:
4 pages, 1 figure
doi:
10.1103/PhysRevLett.88.097905
arxiv_id:
quant-ph/0110088
journal_ref:
Phys. Rev. Lett., 88 (2002) 097905
created:
2001-10-14
updated:
2002-02-01

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