Conditional cooling limit for a quantum channel going through an incoherent environment.
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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 limit specifies when the single-qubit channel is quantum, i.e. it preserves entanglement.
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Affiliation: Department of Optics, Faculty of Science, Palacký University, 17. listopadu 1192/12, 771 46 Olomouc, Czech Republic.
ABSTRACT
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. No MeSH data available. Related in: MedlinePlus |
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f2: (a) The schematic of the experiment. (b) An extension allowing more general setting of the parameters PS, PL, pT. Mentions: In previous work10, only single-photon noise was considered. This case is represented in our parametric space by the plane PL = 0. Our proposed simulator covers a more general case of non-zero PL. For our proof-of-principle measurement, we used the setup shown on Fig. 2a. The simulated parameters are then bound by 2PS + PL = 1. If one needs to simulate a general set of PS, PF, PL, one would simply use the environment shown on Fig. 2b. |
View Article: PubMed Central - PubMed
Affiliation: Department of Optics, Faculty of Science, Palacký University, 17. listopadu 1192/12, 771 46 Olomouc, Czech Republic.
No MeSH data available.