Transfer of an arbitrary photon state along a cavity array without initialization

Liu, Yang; Zhou, D. L.

doi:10.1088/1367-2630/17/1/013032

Cited by 13 publications

(15 citation statements)

References 59 publications

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“…[3,4] and references therein, and Ref. [5] for an implementation with a cavity array). Protocols based on time-dependent couplings [6,7], fully engineered interactions [8,9], ballistic transfer [11][12][13][14][15][16], Rabi-like oscillations [17][18][19][20][21][22][23][24][25][26][27][28], just to name a few, have been shown to achieve high fidelity 1-QST, in addition to some additional tasks like routing of the quantum information to an on-demand location on a spin graph [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Transfer of arbitrary two-qubit states via a spin chain

et al. 2015

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We investigate the fidelity of the quantum state transfer (QST) of two qubits by means of an arbitrary spin-1 2 network, on a lattice of any dimensionality. Under the assumptions that the network Hamiltonian preserves the magnetization and that a fully polarized initial state is taken for the lattice, we obtain a general formula for the average fidelity of the two qubits QST, linking it to the one-and two-particle transfer amplitudes of the spin excitations among the sites of the lattice. We then apply this formalism to a 1D spin chain with XX-Heisenberg type nearest-neighbour interactions adopting a protocol that is a generalization of the single qubit one proposed in Paganelli et al. [Phys. Rev. A 87, 062309 (2013)]. We find that a high-quality two qubit QST can be achieved provided one can control the local fields at sites near the sender and receiver. Under such conditions, we obtain an almost perfect transfer in a time that scales either linearly or, depending on the spin number, quadratically with the length of the chain.

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Section: Introductionmentioning

confidence: 99%

Transfer of arbitrary two-qubit states via a spin chain

et al. 2015

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“…In general, the state of the receiver at time t is a mixed state ρ r (t), which can be obtained by tracing off the other sites ρ r (τ ) = Tr r (e −iHt |ψ(0) ψ(0)|e iHt ). sin θ i e iϕ1 ) (12) with θ i ∈ [0, π 2 ] and ϕ i ∈ [0, 2π). The fidelity between the sent state of the sender and the received state of the receiver at time τ is given by F (τ )= s ϕ|ρ r (τ )|ϕ s .…”

Section: Quantum State Transfer and The Thermal Effectsmentioning

confidence: 99%

Transfer of high-dimensional quantum state through an XXZ-Heisenberg quantum spin chain

Yang

Gao

Qin

2015

Int. J. Mod. Phys. B

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We propose and analyze an efficient high-dimensional quantum state transfer scheme through an XXZ-Heisenberg spin chain in an inhomogeneous magnetic field. By the use of a combination of coherent quantum coupling and free spin-wave approximation, pure unitary evolution results in a perfect high-dimensional swap operation between two remote quantum registers mediated by a uniform quantum data bus, and the feasibility is confirmed by numerical simulations. Also, we observe that either the strong z-directional coupling or high quantum spin number can partly suppress the thermal excitations and protect quantum information from the thermal noises when the quantum data bus is in the thermal equilibrium state.

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“…Recent developments in fabrication of suitably coupled cavities have made it possible to study their use in transferring information using photons as the carrier [2][3][4]. Highly tunable cavity couplings and resonance frequencies of coupled cavities make them suitable for photon transfer, quantum state transfer, entanglement generation, etc [5][6][7][8][9][10]. Transport of photons in an array can be modified by embedding atoms or Kerr-medium in the cavities which modify the cavity resonance frequencies [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Atomic switch for control of heat transfer in coupled cavities

Meher

Sivakumar

2019

J. Opt. Soc. Am. B

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Controlled heat transfer and thermal rectification in a system of two coupled cavities connected to thermal reservoirs are discussed. Embedding a dispersively interacting two-level atom in one of the cavities allows switching from a thermally conducting to resisting behavior. By properly tuning the atomic state and system-reservoir parameters, direction of current can be reversed. It is shown that a large thermal rectification is achievable in this system by tuning the cavity-reservoir and cavity-atom couplings. Partial recovery of diffusive heat transport in an array of N cavities containing one dispersively coupled atom is discussed. *

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Transfer of an arbitrary photon state along a cavity array without initialization

Cited by 13 publications

References 59 publications

Transfer of arbitrary two-qubit states via a spin chain

Transfer of arbitrary two-qubit states via a spin chain

Transfer of high-dimensional quantum state through an XXZ-Heisenberg quantum spin chain

Atomic switch for control of heat transfer in coupled cavities

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