Controllable quantum spin precession by Aharonov–Casher phase in a conducting ring

Shun-Qing Shen, Amlan J.; Zhi-Jian Li; Zhongshui Ma, Amlan J.
February 2004
Applied Physics Letters;2/9/2004, Vol. 84 Issue 6, p996
Academic Journal
We investigate quantum spin transport in a structure of a conducting ring embedded in a textured electric field with two leads, and obtain an exact solution for the problem. The spin precession induced by the Aharonov–Casher phase is studied. It is shown that the spin-polarized current and its polarization orientation can be controlled by the electric field. As a result the modulated polarization orientation is a function of the geometric phase which originates from spin–orbital interaction in the ring. © 2004 American Institute of Physics.


Related Articles

  • Microscopic and macroscopic polarization within a combined quantum mechanics and molecular mechanics model. Jensen, L.; Swart, Marcel; van Duijnen, Piet Th. // Journal of Chemical Physics;1/15/2005, Vol. 122 Issue 3, p034103 

    A polarizable quantum mechanics and molecular mechanics model has been extended to account for the difference between the macroscopic electric field and the actual electric field felt by the solute molecule. This enables the calculation of effective microscopic properties which can be related to...

  • Electrostatically Shielded Quantum Confined Stark Effect Inside Polar Nanostructures. Riyopoulos, Spilios // Nanoscale Research Letters;Sep2009, Vol. 4 Issue 9, p993 

    The effect of electrostatic shielding of the polarization fields in nanostructures at high carrier densities is studied. A simplified analytical model, employing screened, exponentially decaying polarization potentials, localized at the edges of a QW, is introduced for the ES-shielded quantum...

  • General approaches in ensemble quantum computing. Vimalan, V.; Chandrakumar, N. // Journal of Chemical Sciences;Jan2008, Vol. 120 Issue 1, p57 

    We have developed methodology for NMR quantum computing focusing on enhancing the efficiency of initialization, of logic gate implementation and of readout. Our general strategy involves the application of rotating frame pulse sequences to prepare pseudopure states and to perform logic...

  • Casimir Torque for a Perfectly Conducting Wedge: A Canonical Quantum Field Theoretical Approach. Razmi, H.; Modarresi, S. // International Journal of Theoretical Physics;Feb2005, Vol. 44 Issue 2, p229 

    The torque density per unit height exerted on a perfectly conducting wedge due to the quantum vacuum fluctuations (the Casimir torque) is obtained by calculating the vacuum-to-vacuum propagator (Green function) of a canonical quantum field.

  • On electric fields created by quantized vortices. Rukin, A. S.; Shevchenko, S. I. // Low Temperature Physics;Oct2011, Vol. 37 Issue 10, p884 

    It is shown that in a magnetic field the quantized vortices in a superfluid acquire a real quantized electric charge concentrated in the vortex core. This charge is compensated by an opposite surface charge, located at macroscopic distance from the vortex axis. It is found that polarization...

  • Path integrals for spinning particles, stationary phase and the Duistermaat-Heckmann theorem. Ercolessi, E.; Morandi, G.; Napoli, F. // Journal of Mathematical Physics;Feb96, Vol. 37 Issue 2, p535 

    Examines the problem of the evaluation of both the propagator of the partition function of a spinning particle in an external field at the classical and quantum level. Exactness of the stationary phase approximation; Presence of regulators in the action that enters the path integral; Validity...

  • Spin Correlations in Nonrelativistic Quantum Mechanics. Caban, P.; Rembielinski, J.; Smolinski, K. A.; Walczak, Z. // International Journal of Theoretical Physics;May2003, Vol. 42 Issue 5, p1045 

    Einstein�Podolsky�Rosen spin correlations in the framework of nonrelativistic quantum mechanics for moving observers are calculated. The measurements are performed in bounded regions of space (detectors), not necessarily simultaneously. The resulting correlation function depends not...

  • Particle gyration in the presence of nonuniform static or oscillatory electric fields: Gyrofrequency shift and gyrophase locking. Auerbach, Steven P. // Physics of Fluids (00319171);Jul87, Vol. 30 Issue 7, p2139 

    Gyromotion is studied by applying averaging techniques to exact equations for the guiding-center position, magnetic moment, and gyrophase. A static nonuniform force F is shown to shift the gyrofrequency from Ω to ω=Ω-∇⊥·(F/2mΩ). The effects of this gyrofrequency shift...

  • Broadening of CH[sub 3]F in presence of Stark fields. II. Collisional coupling between the Stark... Lemaire, V.; Dore, L.; Cazzoli, G.; Buffa, G.; Tarrini, O.; Baldanzi, E.; Belli, S. // Journal of Chemical Physics;5/15/1999, Vol. 110 Issue 19, p9418 

    Studies the collisional line shape of methyl fluoride rotational transitions under the effect of a static electric field. Collisional coupling between partially overlapping Stark components; Collisional relaxation matrix; Reliability of different approximate treatments used in the literature...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics