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Article Dans Une Revue Physical Review Letters Année : 2011

Quantum Decoherence of Single-Photon Counters

Virginia d'Auria
Taoufik Amri
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Julien Laurat

Résumé

The interaction of a quantum system with the environment leads to the so-called quantum decoherence. Beyond its fundamental significance, the understanding and the possible control of this dynamics in various scenarios is a key element for mastering quantum information processing. Here we report the quantitative probing of what can be called the quantum decoherence of detectors, a process reminiscent of the decoherence of quantum states in the presence of coupling with a reservoir. We demonstrate how the quantum features of two single-photon counters vanish under the influence of a noisy environment. We thereby experimentally witness the transition between the full-quantum operation of the measurement device to the "semi-classical regime", described by a positive Wigner function. The exact border between these two regimes is explicitely determined and measured experimentally.
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Dates et versions

hal-00594398 , version 1 (20-05-2011)
hal-00594398 , version 2 (01-09-2011)

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Citer

Virginia d'Auria, Noriyuki Lee, Taoufik Amri, Claude Fabre, Julien Laurat. Quantum Decoherence of Single-Photon Counters. Physical Review Letters, 2011, 107, pp.050504. ⟨10.1103/PhysRevLett.107.050504⟩. ⟨hal-00594398v2⟩
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