Perfect Transfer of Arbitrary States in Quantum Spin Networks

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dc.creatorChristandl, Matthias
dc.creatorDatta, Nilanjana
dc.creatorDorlas, Tony C.
dc.creatorEkert, Artur
dc.creatorKay, Alastair
dc.creatorLandahl, Andrew J.
dc.date2004-11-02
dc.date2004-11-22
dc.date.accessioned2026-07-07T06:11:25Z
dc.date.available2026-07-07T06:11:25Z
dc.descriptionWe propose a class of qubit networks that admit perfect state transfer of any two-dimensional quantum state in a fixed period of time. We further show that such networks can distribute arbitrary entangled states between two distant parties, and can, by using such systems in parallel, transmit the higher dimensional systems states across the network. Unlike many other schemes for quantum computation and communication, these networks do not require qubit couplings to be switched on and off. When restricted to $N$-qubit spin networks of identical qubit couplings, we show that $2\log_3 N$ is the maximal perfect communication distance for hypercube geometries. Moreover, if one allows fixed but different couplings between the qubits then perfect state transfer can be achieved over arbitrarily long distances in a linear chain. This paper expands and extends the work done in PRL 92, 187902.
dc.description12 pages, 3 figures with updated references
dc.identifierhttps://arxiv.org/abs/quant-ph/0411020
dc.identifierhttp://arxiv.org/abs/quant-ph/0411020
dc.identifierPhys. Rev. A 71, 032312 (2005)
dc.identifierdoi:10.1103/PhysRevA.71.032312
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/92481
dc.subjectQuantum Physics
dc.titlePerfect Transfer of Arbitrary States in Quantum Spin Networks
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