Quantum-state transfer through long-range correlated disordered channels

Almeida, G. M. A.; Moura, F. A. B. F. de; Lyra, Marcelo L.

doi:10.1016/j.physleta.2018.03.028

Cited by 26 publications

(9 citation statements)

References 74 publications

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“…While an extensive analysis of the performance of our protocol under these conditions has not been presented here, and may be left to future investigation, it is reasonable to assume that similar analyses done for the one-particle transfer scenario may apply also for two-particle routing as our results are derived from single-particle transition amplitudes. In this regard, disorder in couplings [ 21 , 30 , 31 , 32 , 33 ], time-dependent couplings [ 34 , 35 ], and decoherence [ 36 , 37 ] have been extensively addressed and several strategies to counter the detrimental effect on the transfer quality have been devised which may find application also in our two-particle routing protocol.…”

Section: Discussionmentioning

confidence: 99%

Two-Excitation Routing via Linear Quantum Channels

Apollaro

Chetcuti

2020

Entropy

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Routing quantum information among different nodes in a network is a fundamental prerequisite for a quantum internet. While single-qubit routing has been largely addressed, many-qubit routing protocols have not been intensively investigated so far. Building on a recently proposed many-excitation transfer protocol, we apply the perturbative transfer scheme to a two-excitation routing protocol on a network where multiple two-receivers block are coupled to a linear chain. We address both the case of switchable and permanent couplings between the receivers and the chain. We find that the protocol allows for efficient two-excitation routing on a fermionic network, although for a spin-12 network only a limited region of the network is suitable for high-quality routing.

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Section: Discussionmentioning

confidence: 99%

Two-Excitation Routing via Linear Quantum Channels

Apollaro

Chetcuti

2020

Entropy

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“…10). This can be called the Rabi-type oscillations between the one-qubit sender and receiver [14,33].…”

Section: The Reason Of Almost Perfect State Transfer Along the Altern...mentioning

confidence: 99%

M-neighbor approximation in one-qubit state transfer along zigzag and alternating spin-1/2 chains

Fel'dman¹,

Zenchuk²

2023

Preprint

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We consider the M -neighbor approximation in the problem of one-qubit pure state transfer along the N -node zigzag and alternating spin chains governed by the XXZ-Hamiltonian with the dipoledipole interaction. We show that always M > 1, i.e., the nearest neighbor approximation is not applicable to such interaction. Moreover, only all-node interaction (M = N − 1) properly describes the dynamics in the alternating chain. We reveal the region in the parameter space characterizing the chain geometry and orientation which provide the high-probability state-transfer. The optimal state-transfer probability and appropriate time instant for the zigzag and alternating chains are compared.

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“…We should also mention important contributions on the usefulness of chains of continuous variable systems in transmitting quantum states [8,9,10,17,33]. Most of the aforementioned works studied strictly one dimensional chains with open or periodic boundary conditions and extensive investigations on the performance of those systems in the presence of disorder and noise can be found in [5,37,38,39,40,41,42,43,44,45,46,47,48,49,50].…”

Section: Introductionmentioning

confidence: 99%

Robust and efficient transport of two-qubit entanglement via disordered spin chains

Vieira

Rigolin

2019

Quantum Inf Process

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We investigate how robust is the modified XX spin-1/2 chain of [R. G. Rigolin, Phys. Lett. A 382, 2586 (2018)] in transmitting entanglement when several types of disorder and noise are present. First, we consider how deviations about the optimal settings that lead to almost perfect transmission of a maximally entangled two-qubit state affect the entanglement reaching the other side of the chain. Those deviations are modeled by static, dynamic, and fluctuating disorder. We then study how spurious or undesired interactions and external magnetic fields diminish the entanglement transmitted through the chain. For chains of the order of hundreds of qubits, we show for all types of disorder and noise here studied that the system is not appreciably affected when we have weak disorder (deviations of less than 1% about the optimal settings) and that for moderate disorder it still beats the standard and ordered XX model when deployed to accomplish the same task. IntroductionAn important tool in the practical implementation of quantum computation and communication tasks is the reliable transmission of quantum states from one location to another [1]. Quantum information, or equivalently a quantum state, can be sent from one party (Alice) to another (Bob) in at least three ways, namely, via direct transmission, via the quantum teleportation protocol [2], and via spin chains [3]. This last strategy, where Alice and Bob are connected by a spin chain through which they can send quantum states to each

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Quantum-state transfer through long-range correlated disordered channels

Cited by 26 publications

References 74 publications

Two-Excitation Routing via Linear Quantum Channels

Two-Excitation Routing via Linear Quantum Channels

M-neighbor approximation in one-qubit state transfer along zigzag and alternating spin-1/2 chains

Robust and efficient transport of two-qubit entanglement via disordered spin chains

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