scholarly journals Exact intrinsic localized excitation of an anisotropic ferromagnetic spin chain in external magnetic field with Gilbert damping, spin current and PT-symmetry

2018 ◽  
Vol 382 (28) ◽  
pp. 1890-1895
Author(s):  
M. Lakshmanan ◽  
Avadh Saxena
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Spin Chain ◽  
Spin Current ◽  
Pt Symmetry ◽  
Gilbert Damping

Solitons in a uniaxial anisotropic Heisenberg spin chain with Gilbert damping in an external magnetic field

1997 ◽  
Vol 55 (2) ◽  
pp. 1375-1394 ◽  
Author(s):  
Wu-Ming Liu ◽  
Xiao-Bing Wang ◽  
Fu-Cho Pu ◽  
Nian-Ning Huang
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Spin Chain ◽  
Gilbert Damping ◽  
Heisenberg Spin ◽  
Heisenberg Spin Chain

scholarly journals PERSISTENT SPIN CURRENT AND ENTANGLEMENT IN THE ANISOTROPIC SPIN RING

2007 ◽  
Vol 21 (06) ◽  
pp. 327-337 ◽  
Author(s):  
ZI-XIANG HU ◽  
YOU-QUAN LI
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Flux ◽  
Ground State ◽  
State Energy ◽  
Spin Current ◽  
Persistent Current ◽  
One Dimensional ◽  
The Magnetic Field ◽  
Twisted Boundary Conditions

We investigate the ground state persistent spin current and the pair entanglement in one-dimensional antiferromagnetic anisotropic Heisenberg ring with twisted boundary conditions. By solving Bethe ansatz equations numerically, we calculate the dependence of the ground state energy on the total magnetic flux through the ring, and the resulting persistent current. Motivated by the recent development of the quantum entanglement theory, we study the properties of the ground state concurrence under the influence of the flux through the anisotropic Heisenberg ring. We also include an external magnetic field and discuss the properties of the persistent current and the concurrence in the presence of the magnetic field.

Quantum correlations and entropic uncertainty relation in a three-qubit spin chain under the effect of magnetic field and DM interaction

2018 ◽  
Vol 16 (07) ◽  
pp. 1850057 ◽  
Author(s):  
Mohammad Reza Pourkarimi
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Spin Chain ◽  
Uncertainty Relation ◽  
Quantum Correlations ◽  
Spin Coupling ◽  
Xy Model ◽  
Thermal Dynamics ◽  
Dm Interaction ◽  
Entropic Uncertainty Relation

In this paper, we study the thermal dynamics of quantum correlations and uncertainty relation in a three-qubit spin chain under the effect of Hamiltonian XY model, Dzyaloshinskii–Moriya (DM) interaction and external magnetic field. The results show that quantum correlations behave contrary to uncertainty under the effect of thermal dynamics and external magnetic field. However, they evolve in the same way under effect of DM interaction and spin coupling. DM interaction, magnetic field and spin coupling enhance quantum correlations.

scholarly journals TEMPERATURE DEPENDENCE OF SPIN CURRENTS CARRIED BY JORDAN–WIGNER FERMIONS AND MAGNONS IN INSULATORS

2012 ◽  
Vol 26 (01) ◽  
pp. 1250011
Author(s):  
KOUKI NAKATA
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Temperature Dependence ◽  
Magnetic Field Gradient ◽  
Particle Interaction ◽  
Three Dimensional ◽  
Spin Current ◽  
One Dimensional ◽  
Spin Currents ◽  
The One

The temperature dependence of spin currents in insulators at the finite temperature near zero Kelvin is theoretically studied. The spin currents are carried by Jordan–Wigner fermions and magnons in one- and three-dimensional insulators. These spin currents are generated by the external magnetic field gradient along the quantization axis and also by the two-particle interaction gradient. In one-dimensional insulators, quantum fluctuations are strong and the spin current carried by Jordan–Wigner fermions shows the stronger dependence on temperatures than the one by magnons.

scholarly journals PERSISTENT SPIN CURRENT IN SPIN-ORBIT COUPLING SYSTEMS IN THE ABSENCE OF AN EXTERNAL MAGNETIC FIELD

2007 ◽  
Vol 21 (21) ◽  
pp. 3687-3695 ◽  
Author(s):  
QING-FENG SUN ◽  
X. C. XIE
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Quantum Wire ◽  
Spin Current ◽  
Orbit Coupling ◽  
Zero Magnetic Field ◽  
Spin Accumulation ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Two Dimensional

The spin-orbit coupling systems with a zero magnetic field are studied under the equilibrium situation, i.e., without a voltage bias. A persistent spin current is predicted to exist under most circumstances, although the persistent charge current and the spin accumulation are identically zero. In particular, a two-dimensional quantum wire is investigated in detail. Surprisingly, a persistent spin current is found to flow along the confined direction, due to the spin precession accompanied by the particle motion. This provides an interesting example of constant spin flowing without inducing a spin accumulation, contrary to common intuition.

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