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Quantum entanglement in spin chains with the XY Hamiltonian at the quantum state transfer
Author(s): I. D. Lazarev; E. I. Kuznetsova
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Paper Abstract

In the present work the generation of entanglement between the receiver and sender is investigated in the process of the quantum state transfer in the homogeneous one-dimensional chain of spins 1/2 with the XY -Hamiltonian in the approximation of the nearest neighbour interactions. Fidelity is obtained for a quantum state transfer for various numbers of spins and temperatures and values of initial polarisation of the sender’s spin. The transmitted pure state is encoded in the state of first spin (sender) in the initial time moment. The other spins are in the thermodynamic equilibrium state. The reduced density matrix for the receiver and the sender is obtained for an investigation of entanglement in the “sender-receiver” system. The effect of temperature and polarization of the transmitted state on the generation of entanglement in the system is also investigated.

Paper Details

Date Published: 15 March 2019
PDF: 11 pages
Proc. SPIE 11022, International Conference on Micro- and Nano-Electronics 2018, 110222G (15 March 2019); doi: 10.1117/12.2521624
Show Author Affiliations
I. D. Lazarev, Institute of Problems of Chemical Physics RAS (Russian Federation)
Lomonosov Moscow State Univ. (Russian Federation)
E. I. Kuznetsova, Institute of Problems of Chemical Physics RAS (Russian Federation)


Published in SPIE Proceedings Vol. 11022:
International Conference on Micro- and Nano-Electronics 2018
Vladimir F. Lukichev; Konstantin V. Rudenko, Editor(s)

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