Thermal entanglement of a two-qutrit Ising system with Dzialoshinski–Moriya interaction

Thermal entanglement of a two-qutrit Ising system in the presence of an external homogeneous magnetic field and Dzialoshinski–Moriya (DM) interaction is investigated. Influences of magnetic field, temperature, and DM interaction on the entanglement have been characterized in terms of negativity for...

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Bibliographic Details
Published in:Optics communications 2008-10, Vol.281 (20), p.5271-5277
Main Authors: Akyüz, C., Aydıner, E., Müstecaplıoğlu, Ö.E.
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Foundations, theory of measurement, miscellaneous theories (including aharonov-bohm effect, bell inequalities, berry's phase)
Lattice theory and statistics (ising, potts, etc.)
Negativity
Physics
Quantum computation
Quantum computing
Quantum information
Quantum mechanics
Statistical physics, thermodynamics, and nonlinear dynamical systems
Thermal entanglement
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Summary:Thermal entanglement of a two-qutrit Ising system in the presence of an external homogeneous magnetic field and Dzialoshinski–Moriya (DM) interaction is investigated. Influences of magnetic field, temperature, and DM interaction on the entanglement have been characterized in terms of negativity for a wide range of parameters. The cases of parallel, antiparallel and transverse magnetic fields are considered. Results of detailed numerical calculations are explained using the analytically determined ground and excited states of the system. It is shown that at a given temperature, control of entanglement can be optimized by utilizing competing effects of the magnetic field and the DM interaction.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2008.07.012