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Examining non-locality and quantum coherent dynamics induced by a common reservoir.

Chen GY, Chen SL, Li CM, Chen YN - Sci Rep (2013)

Bottom Line: Here, we propose to use the steering inequality to examine the non-locality induced by a common reservoir.Compared with the Bell inequality, we find that the steering inequality has a better tolerance for examining non-locality.In view of the dynamic nature of the entangling process, we also propose to observe the quantum coherent dynamics by using the Leggett-Garg inequalities.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, National Chung Hsing University, Taichung 402, Taiwan.

ABSTRACT
If two identical emitters are coupled to a common reservoir, entanglement can be generated during the decay process. When using Bell's inequality to examine the non-locality, however, it is possible that the bound cannot be violated in some cases. Here, we propose to use the steering inequality to examine the non-locality induced by a common reservoir. Compared with the Bell inequality, we find that the steering inequality has a better tolerance for examining non-locality. In view of the dynamic nature of the entangling process, we also propose to observe the quantum coherent dynamics by using the Leggett-Garg inequalities. We also suggest a feasible scheme, which consists of two quantum dots coupled to nanowire surface plasmons, for possible experimental realization.

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Schematics of a experimentally-accessible system.Two two-level quantum dots coupled to metal nanowire surface plasmons. Here, the quantum dot-1 is assumed to be excited initially, and one measures the populations of the quantum dot-2.
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f6: Schematics of a experimentally-accessible system.Two two-level quantum dots coupled to metal nanowire surface plasmons. Here, the quantum dot-1 is assumed to be excited initially, and one measures the populations of the quantum dot-2.

Mentions: Here, we propose an experimental realization for verifying the quantum coherent dynamics in SR. Consider two quantum dots positioned near a metal nanowire203435 as shown in Fig. 6. Due to the quantum confinement, the surface plasmons propagate one-dimensionally along the axis direction on the surface of the nanowire. Quantum dot-1 is assumed to be excited initially. In one-dimensional problems, the SR becomes independent of the inter-dot distance. If we choose Q = Q3, the kernel of both LG and ELG inequality can be written as The advantage of choosing Q = Q3 = 1–2 /0, 1〉 〈0, 1/ is that, experimentally, one only needs to measure the population of quantum dot-2.


Examining non-locality and quantum coherent dynamics induced by a common reservoir.

Chen GY, Chen SL, Li CM, Chen YN - Sci Rep (2013)

Schematics of a experimentally-accessible system.Two two-level quantum dots coupled to metal nanowire surface plasmons. Here, the quantum dot-1 is assumed to be excited initially, and one measures the populations of the quantum dot-2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3753592&req=5

f6: Schematics of a experimentally-accessible system.Two two-level quantum dots coupled to metal nanowire surface plasmons. Here, the quantum dot-1 is assumed to be excited initially, and one measures the populations of the quantum dot-2.
Mentions: Here, we propose an experimental realization for verifying the quantum coherent dynamics in SR. Consider two quantum dots positioned near a metal nanowire203435 as shown in Fig. 6. Due to the quantum confinement, the surface plasmons propagate one-dimensionally along the axis direction on the surface of the nanowire. Quantum dot-1 is assumed to be excited initially. In one-dimensional problems, the SR becomes independent of the inter-dot distance. If we choose Q = Q3, the kernel of both LG and ELG inequality can be written as The advantage of choosing Q = Q3 = 1–2 /0, 1〉 〈0, 1/ is that, experimentally, one only needs to measure the population of quantum dot-2.

Bottom Line: Here, we propose to use the steering inequality to examine the non-locality induced by a common reservoir.Compared with the Bell inequality, we find that the steering inequality has a better tolerance for examining non-locality.In view of the dynamic nature of the entangling process, we also propose to observe the quantum coherent dynamics by using the Leggett-Garg inequalities.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, National Chung Hsing University, Taichung 402, Taiwan.

ABSTRACT
If two identical emitters are coupled to a common reservoir, entanglement can be generated during the decay process. When using Bell's inequality to examine the non-locality, however, it is possible that the bound cannot be violated in some cases. Here, we propose to use the steering inequality to examine the non-locality induced by a common reservoir. Compared with the Bell inequality, we find that the steering inequality has a better tolerance for examining non-locality. In view of the dynamic nature of the entangling process, we also propose to observe the quantum coherent dynamics by using the Leggett-Garg inequalities. We also suggest a feasible scheme, which consists of two quantum dots coupled to nanowire surface plasmons, for possible experimental realization.

Show MeSH
Related in: MedlinePlus