Transport properties of the non-Hermitian T-shaped quantum router

Liu, Lin; Zhang, Ji Hong; Jin, Lin; Zhou, Lan

doi:10.1364/oe.27.013694

Cited by 9 publications

(5 citation statements)

References 71 publications

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“…Extending the ideas of controlling the reflection and transmission of a photon by an atom in an array, quantum routers [357][358][359][360][361][362][363][364][365][366][367][368][369][370] are proposed by coupling two different cavity arrays in X-shape [371], T -shape [372][373][374], T -bulge-shape [375,376], Π-shape [377], etc. Routing of photons allows to connect several quantum nodes to build a quantum network.…”

Section: B Controllable Photon Transfermentioning

confidence: 99%

“…But one can see that the maximum rate of transfer does not exceed 0.5, which may limits the complete transfer of quantum information from a sender to a receiver. In order to enhance the transfer rate, T -shape [372][373][374] quantum router is proposed. In T -shape quantum router [372], one of the arrays is infinite-dimensional and other is semi-infinite (refer Fig.…”

Section: B Controllable Photon Transfermentioning

confidence: 99%

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Quantum information processing in cavities: A review

Meher,

Sivakumar

2022

Preprint

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Processing of information and computation undergoing a paradigmatic shift since the realization of the enormous potential of quantum features to perform these tasks. Coupled cavity array is one of the well-studied systems to carry out these tasks. It is a versatile platform to build quantum networks for distributed information processing and communication. Cavities have the salient feature of retaining photons for longer, thereby enabling them to travel coherently through the array without losing them in dissipation. Several research groups have successfully demonstrated the coupling of cavities and implemented various quantum information protocols. These advancements pave the way for implementing cavity arrays for large scale quantum communications and computations. This article reviews theoretical proposals and discusses a few pertinent experimental realizations of quantum information tasks in cavities.

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Section: B Controllable Photon Transfermentioning

confidence: 99%

Section: B Controllable Photon Transfermentioning

confidence: 99%

Quantum information processing in cavities: A review

Meher,

Sivakumar

2022

Preprint

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“…Besides, a similar scheme is proposed where two distant optical channels are designed to construct a PTsymmetric system by coupling them to the common reservoir environment (see figure 23(b)) [291]. Three or more level non-Hermitian systems, along this line, can be realized in threelevel atoms/semiconductor quantum dots [306][307][308][309], emitters [310], and photon modes [311].…”

Section: Two/multi-level Systemsmentioning

confidence: 99%

Topological physics of non-Hermitian optics and photonics: a review

Wang

Zhang

Hua

et al. 2021

J. Opt.

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The notion of non-Hermitian optics and photonics rooted in quantum mechanics and photonic systems has recently attracted considerable attention ushering in tremendous progress on theoretical foundations and photonic applications, benefiting from the flexibility of photonic platforms. In this review, we first introduce the non-Hermitian topological physics from the symmetry of matrices and complex energy spectra to the characteristics of Jordan normal forms, exceptional points, biorthogonal eigenvectors, Bloch/non-Bloch band theories, topological invariants and topological classifications. We further review diverse non-Hermitian system branches ranging from classical optics, quantum photonics to disordered systems, nonlinear dynamics and optomechanics according to various physical equivalences and experimental implementations. In particular, we include cold atoms in optical lattices in quantum photonics due to their operability at quantum regimes. Finally, we summarize recent progress and limitations in this emerging field, giving an outlook on possible future research directions in theoretical frameworks and engineering aspects.

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“…Quantum router is one of the essential elements in the quantum network, which directs single photons from a coherent input to a separate output. Single-photon router is proposed both theoretically and experimentally by exploiting the strong coupling between an atom and the confined field [22][23][24][25][26][27][28][29][30][31][32][33][34]. The chiral atom-photon couplings has even been used to direct a single photon from the input port to an arbitrarily selected output port deterministically.…”

Section: Introductionmentioning

confidence: 99%

Few-photon routing via chiral light-matter couplings

Yang¹,

Lu²,

Zhou³

2022

Commun. Theor. Phys.

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Quantum router is one of the essential elements in the quantum network. Conventional routers only direct a single photon from one quantum channel into another. Here, we proposed a few-photon router. The active element of the router is a single qubit chirally coupled to two independent waveguides simultaneously, where each waveguide mode provides a quantum channel. By introducing the operators of the scatter-free space and the controllable space, the output state of the one-photon and two-photon scattering are derived analytically. It is found that the qubit can direct one and two photons from one port of the incident waveguide to an arbitrarily selected port of the other waveguide with unity, respectively. However, two photons cannot be simultaneously routed to the same port due to the anti-bunch effect.

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Transport properties of the non-Hermitian T-shaped quantum router

Cited by 9 publications

References 71 publications

Quantum information processing in cavities: A review

Quantum information processing in cavities: A review

Topological physics of non-Hermitian optics and photonics: a review

Few-photon routing via chiral light-matter couplings

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