Quantum dynamics of the molecular magnet driven by external magnetic fields

2004 ◽  
Vol 70 (21) ◽  
Author(s):  
Miao Mai ◽  
Ximing Cheng ◽  
Xiang-Gui Li ◽  
Ping Zhang
Keyword(s):  
Magnetic Fields ◽  
Quantum Dynamics ◽  
Molecular Magnet

scholarly journals Dynamics of an orbital polarization of twisted electron beams in electric and magnetic fields

2019 ◽  
Vol 204 ◽  
pp. 10008
Author(s):  
Alexander J. Silenko ◽  
Pengming Zhang ◽  
Liping Zou
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Magnetic Fields ◽  
Quantum Dynamics ◽  
Electron Beams ◽  
Equations Of Motion ◽  
Vortex Beam ◽  
Dirac Particles ◽  
Electric And Magnetic Fields ◽  
Average Projection

Relativistic classical and quantum dynamics of twisted (vortex) Dirac particles in arbitrary electric and magnetic fields is constructed. The relativistic Hamiltonian and equations of motion in the Foldy-Wouthuysen representation are derived. Methods for the extraction of an electron vortex beam with a given orbital polarization and for the manipulation of such a beam are developed. The new effect of a radiative orbital polarization of a twisted electron beam in a magnetic field resulting in a nonzero average projection of the intrinsic orbital angular momentum on the field direction is predicted.

Quantum dynamics of molecular magnets in ultra-fast sweeping magnetic fields

2004 ◽  
Vol 346-347 ◽  
pp. 216-220 ◽  
Author(s):  
Hiroyuki Nojiri ◽  
Tomohiro Taniguchi ◽  
Yoshitami Ajiro ◽  
Achim Müller ◽  
Bernard Barbara
Keyword(s):  
Magnetic Fields ◽  
Quantum Dynamics ◽  
Molecular Magnets ◽  
Fast Sweeping

scholarly journals SYMMETRIES OF THE NEAR HORIZON OF A BLACKHOLE BY GROUP THEORETIC METHODS

2007 ◽  
Vol 22 (08n09) ◽  
pp. 1717-1726
Author(s):  
K. MAHARANA
Keyword(s):  
Black Hole ◽  
Charged Particle ◽  
Magnetic Fields ◽  
Lie Algebras ◽  
Quantum Dynamics ◽  
Equations Of Motion ◽  
Scalar Particle ◽  
Lie Point Symmetries

We use group theoretic methods to obtain the extended Lie point symmetries of the quantum dynamics of a scalar particle probing the near horizon structure of a black hole. Symmetries of the classical equations of motion for a charged particle in the field of an inverse square potential and a monopole, in the presence of certain model magnetic fields and potentials are also studied. Our analysis gives the generators and Lie algebras generating the inherent symmetries.

scholarly journals APPLICATIONS OF MAGNETIC ΨDO TECHNIQUES TO SAPT

2011 ◽  
Vol 23 (03) ◽  
pp. 233-260 ◽  
Author(s):  
GIUSEPPE DE NITTIS ◽  
MAX LEIN
Keyword(s):  
Magnetic Fields ◽  
Invariant Subspace ◽  
Quantum Dynamics ◽  
Pseudodifferential Operators ◽  
Spatial Scales ◽  
Equations Of Motion ◽  
Additional Parameter ◽  
Bloch Band ◽  
The Magnetic Field ◽  
Adiabatic Perturbation Theory

In this review, we show how advances in the theory of magnetic pseudodifferential operators (magnetic ΨDO) can be put to good use in space-adiabatic perturbation theory (SAPT). As a particular example, we extend results of [24] to a more general class of magnetic fields: we consider a single particle moving in a periodic potential which is subjected to a weak and slowly-varying electromagnetic field. In addition to the semiclassical parameter ε ≪ 1 which quantifies the separation of spatial scales, we explore the influence of an additional parameter λ that allows us to selectively switch off the magnetic field. We find that even in the case of magnetic fields with components in [Formula: see text], e.g., for constant magnetic fields, the results of Panati, Spohn and Teufel hold, i.e to each isolated family of Bloch bands, there exists an associated almost invariant subspace of L2(ℝd) and an effective hamiltonian which generates the dynamics within this almost invariant subspace. In case of an isolated non-degenerate Bloch band, the full quantum dynamics can be approximated by the hamiltonian flow associated to the semiclassical equations of motion found in [24].

DYNAMICS OF MOLECULAR MAGNET Fe8 INTERACTING WITH AN INJECTING SPIN-POLARIZED ELECTRON

2004 ◽  
Vol 18 (11) ◽  
pp. 479-483
Author(s):  
GUO-FENG ZHANG ◽  
YIN WEN ◽  
YING-FANG GAO ◽  
JIU-QING LIANG ◽  
QI-WEI YAN
Keyword(s):  
Time Evolution ◽  
Nuclear Spin ◽  
Quantum Dynamics ◽  
Interaction Strength ◽  
Time Dependent ◽  
Molecular Magnet ◽  
Schrodinger Equations ◽  
Spin States ◽  
Schrödinger Equations ◽  
Spin Polarized

Quantum dynamics time evolution of a molecular magnet Fe 8 interacting with an electron nuclear spin is studied by solving the time-dependent Schrödinger equations. It is found that the variation of Fe 8 magnetization and the nuclear spin crucially depends on the interaction strength. The time evolution of the entanglement between the injecting electron and Fe 8 is evaluated. It is observed that the entanglement oscillates in time and is tightly related to the spin variation of the injecting electron. From these characteristics, the technique for the reversing and read-out of Fe 8 spin states is suggested.

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