Results 71 to 80 of about 220,627 (193)

Electromagnetic Pulse Driven Spin-dependent Currents in Semiconductor Quantum Rings

, 2009
We investigate the non-equilibrium charge and spin-dependent currents in a quantum ring with a Rashba spin orbit interaction (SOI) driven by two asymmetric picosecond electromagnetic pulses. The equilibrium persistent charge and persistent spin-dependent
Ballentine L E, Bychkov Y A, Jamal Berakdar, Matos-Abiague A, Moskalenko A S, Nogueira F S Bennemann K-H, Rashba E I, Schultz M, Sun Q-F, Zhen-Gang Zhu   +9 more
core   +1 more source

Holomorphic Currents and Duality in N=1 Supersymmetric Theories

, 2003
Twisted supersymmetric theories on a product of two Riemann surfaces possess non-local holomorphic currents in a BRST cohomology. The holomorphic currents act as vector fields on the chiral ring.
A. Cappelli, A. Johansen, A. Losev, A.B. Zamolodchikov, Andrei Johansen, D. Anselmi, D. Anselmi, D. Anselmi, D. Anselmi, D. Kutasov, D. Kutasov, F. Cachazo, I. Jack, J. Terning, K. Intriligator, K.A. Intriligator, P. Griffiths, S. Forte   +17 more
core   +3 more sources

Persistent currents in a circular array of Bose-Einstein condensates

, 2003
A ring-shaped array of Bose-Einstein condensed atomic gases can display circular currents if the relative phase of neighboring condensates becomes locked to certain values.
A.A. Svidzinsky, A.A. Svidzinsky, A.J. Leggett, B. Wu, B.P. Anderson, B.P. Anderson, C. Orzel, C.C. Bradley, D. Jaksch, D.S. Rokhsar, F. Zambelli, F.S. Cataliotti, G.-S. Paraoanu, G.J. Milburn, Gh.-S. Paraoanu, J. Denschlag, J. Dziarmaga, J. Javanainen, J.E. Williams, J.R. Abo-Shaeer, J.R. Anglin, K.B. Davis, K.W. Madison, L. Dobrek, L.J. Garay, M. Cristiani, M. Greiner, M. Greiner, M.H. Anderson, M.R. Andrews, M.R. Matthews, R. Carmi, R. Onofrio, R.J. Dodd, S. Sinha, T.W.B. Kibble, W.H. Zurek, W.H. Zurek   +37 more
core   +1 more source

Persistent Currents in Mesoscopic Connected Rings [PDF]

Physical Review Letters, 2001
We report measurements of the low temperature magnetic response of a line of 16 GaAs/GaAlAs connected mesoscopic rings whose total length is much larger than l(straight phi). Using an on-chip micro-SQUID technology, we have measured a periodic response, with period h/e, corresponding to persistent currents in the rings of a typical amplitude of 0.40 ...
W, Rabaud, L, Saminadayar, D, Mailly, K, Hasselbach, A, Benoît, B, Etienne   +5 more
openaire   +2 more sources

Persistent currents in coupled mesoscopic rings [PDF]

Physical Review B, 1996
Submitted to PRB.
Pareek, T. P., Jayannavar, A. M.
openaire   +3 more sources

Resonant persistent currents for ultracold bosons on a lattice ring

, 2017
We consider a one-dimensional bosonic gas on a ring lattice, in the presence of a localized barrier, and under the effect of an artificial gauge field. By means of exact diagonalization we study the persistent currents at varying interactions and barrier
Arwas, Geva, Cohen, Doron, Hekking, Frank, Minguzzi, Anna   +3 more
core   +3 more sources

Quantum current magnification in a multi-channel mesoscopic ring [PDF]

, 2003
We have studied the current magnification effect in a multi-channel open mesoscopic ring. We show that the current magnification effect is robust even in the presence of several propagating modes inspite of mode mixing and cancellation effects.
A. M. Jayannavar, A. M. Jayannavar, A. M. Jayannavar, A. M. Jayannavar, A. M. Jayannavar, C. Kittel, D. F. Shaw, J. Yi, M. Büttiker, M. Büttiker, M. Büttiker, P. F. Bagwell, P. Singha Deo, S. Datta, S. Pedersen, Swarnali Bandopadhyay, T. P. Pareek, Y. Imry   +17 more
core   +3 more sources

Inverse Optically-Induced Ring Currents in Ring-Shaped Molecules

The Journal of Physical Chemistry Letters
Permanent electronic ring currents are supported within manifolds of ΓE degenerate excited electronic states as E± = Ex ± iEy excitations. In [ Phys. Rev. Res. 2021, 3, L042003] we showed the existence of inverse-current manifolds, where the direction of the electronic ring current in each degenerate state E± is opposite to the circular polarization of
Krishna Reddy Nandipati, Sudip Sasmal, Oriol Vendrell   +2 more
openaire   +3 more sources

Dynamics of Energy Transport in a Toda Ring [PDF]

, 2010
We present results on the relationships between persistent currents and the known conservation laws in the classical Toda ring. We also show that perturbing the integrability leads to a decay of the currents at long times, with a time scale that is ...
A. P. Young, B. Sriram Shastry, E. Sklyanin, E. Whittaker, I. S. Gradshtein, M. Abramowitz, M. E. J. Newman, M. Toda   +7 more
core   +2 more sources

Long-lived circulating currents in strongly correlated nanorings

Physical Review Research, 2019
We study the time-evolving currents flowing in an interacting ring-shaped nanostructure after a bias voltage has been switched on. The source-to-drain current exhibits the expected relaxation towards its quasistatic equilibrium value at a rate Γ_{0 ...
B. M. Schoenauer, N. M. Gergs, P. Schmitteckert, F. Evers, D. Schuricht   +4 more
doaj   +1 more source