Conditional cooling limit for a quantum channel going through an incoherent environment

We propose and experimentally verify a cooling limit for a quantum channel going through an incoherent environment. The environment consists of a large number of independent non-interacting and non-interfering elementary quantum systems – qubits. The qubits travelling through the channel can only be...

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Published in:Scientific reports 2015-11, Vol.5 (1), p.16721-16721, Article 16721
Main Authors: Straka, Ivo, Miková, Martina, Mičuda, Michal, Dušek, Miloslav, Ježek, Miroslav, Filip, Radim
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Cooling
Humanities and Social Sciences
multidisciplinary
Science
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description We propose and experimentally verify a cooling limit for a quantum channel going through an incoherent environment. The environment consists of a large number of independent non-interacting and non-interfering elementary quantum systems – qubits. The qubits travelling through the channel can only be randomly replaced by environmental qubits. We investigate a conditional cooling limit that exploits an additional probing output. The limit specifies when the single-qubit channel is quantum, i.e. it preserves entanglement. It is a fundamental condition for entanglement-based quantum technology.
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subjects 639/766/483/2802
639/766/483/481
Cooling
Humanities and Social Sciences
multidisciplinary
Science
title Conditional cooling limit for a quantum channel going through an incoherent environment
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