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Title: Unmodulated spin chains as universal quantum wires

Abstract

We study a quantum state transfer between two qubits interacting with the ends of a quantum wire consisting of linearly arranged spins coupled by an excitation conserving, time-independent Hamiltonian. We show that, if we control the coupling between the source and the destination qubits and the ends of the wire, the evolution of the system can lead to an almost perfect transfer even in the case in which all nearest-neighbour couplings between the internal spins of the wire are equal.

Authors:
; ;  [1]; ; ;  [2]
  1. Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznan (Poland)
  2. Faculty of Mathematics and Computer Science, Adam Mickiewicz University, Umultowska 87, 61-614 Poznan (Poland)
Publication Date:
OSTI Identifier:
20718641
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 72; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.72.034303; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONTROL; COUPLING; EXCITATION; HAMILTONIANS; QUANTUM COMPUTERS; QUANTUM ENTANGLEMENT; QUANTUM WIRES; QUBITS; SPIN

Citation Formats

Wojcik, Antoni, Kurzynski, Pawel, Grudka, Andrzej, Luczak, Tomasz, Gdala, Tomasz, and Bednarska, Malgorzata. Unmodulated spin chains as universal quantum wires. United States: N. p., 2005. Web. doi:10.1103/PhysRevA.72.034303.
Wojcik, Antoni, Kurzynski, Pawel, Grudka, Andrzej, Luczak, Tomasz, Gdala, Tomasz, & Bednarska, Malgorzata. Unmodulated spin chains as universal quantum wires. United States. https://doi.org/10.1103/PhysRevA.72.034303
Wojcik, Antoni, Kurzynski, Pawel, Grudka, Andrzej, Luczak, Tomasz, Gdala, Tomasz, and Bednarska, Malgorzata. 2005. "Unmodulated spin chains as universal quantum wires". United States. https://doi.org/10.1103/PhysRevA.72.034303.
@article{osti_20718641,
title = {Unmodulated spin chains as universal quantum wires},
author = {Wojcik, Antoni and Kurzynski, Pawel and Grudka, Andrzej and Luczak, Tomasz and Gdala, Tomasz and Bednarska, Malgorzata},
abstractNote = {We study a quantum state transfer between two qubits interacting with the ends of a quantum wire consisting of linearly arranged spins coupled by an excitation conserving, time-independent Hamiltonian. We show that, if we control the coupling between the source and the destination qubits and the ends of the wire, the evolution of the system can lead to an almost perfect transfer even in the case in which all nearest-neighbour couplings between the internal spins of the wire are equal.},
doi = {10.1103/PhysRevA.72.034303},
url = {https://www.osti.gov/biblio/20718641}, journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 72,
place = {United States},
year = {2005},
month = {9}
}