Open AccessSwap operation in a two-qubit anisotropy XYZ model in the presence of an inhomogeneous magnetic field
Author(s) -
Guofeng Zhang,
Xin Zhao
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.1468
Subject(s) - spins , physics , qubit , anisotropy , quantum entanglement , swap (finance) , condensed matter physics , quantum mechanics , heisenberg model , quantum , magnetic field , quantum computer , ferromagnetism , finance , economics
Spin model plays an important role in the realization of quantum information processing. Quantum entanglement can be constructed, also swapn quantum logic gate is available if anisotropy is ignored, when Heisenberg interaction between spins is used; thus a complete quantum computing gate will be realized by combining single-qubit rotation gate. To study the influence of anisotropy on logic gate has high academic value since anisotropy is inevitable in any solid material. In this paper, swap operation in a two-qubit anisotropy XYZ model in the presence of an inhomogeneous magnetic field is discussed. The swap errors caused by the anisotropy parameter ν of the exchange interaction between spins and the inhomogeneous field δ are evaluated. We can see clearly when the swap operation can be approximately used as an ideal swap gate.