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

Straka I, Miková M, Mičuda M, Dušek M, Ježek M, Filip R - Sci Rep (2015)

Bottom Line: 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.

View Article: PubMed Central - PubMed

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

(a) The schematic of the experiment. (b) An extension allowing more general setting of the parameters PS, PL, pT.
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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.


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

Straka I, Miková M, Mičuda M, Dušek M, Ježek M, Filip R - Sci Rep (2015)

(a) The schematic of the experiment. (b) An extension allowing more general setting of the parameters PS, PL, pT.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4644953&req=5

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.

Bottom Line: 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.

View Article: PubMed Central - PubMed

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