Physics – Quantum Physics
Scientific paper
2008-06-24
Phys. Rev. E 78, 036219 (2008)
Physics
Quantum Physics
9 pages, 6 figures, submitted to Phys. Rev. E
Scientific paper
10.1103/PhysRevE.78.036219
In a quantum ratchet accelerator system, a linearly increasing directed current can be dynamically generated without using a biased field. Generic quantum ratchet acceleration with full classical chaos [Gong and Brumer, Phys. Rev. Lett. 97, 240602 (2006)] constitutes a new element of quantum chaos and an interesting violation of a sum rule of classical ratchet transport. Here we propose a simple quantum ratchet accelerator model that can also generate linearly increasing quantum current with full classical chaos. This new model does not require a bichromatic lattice potential. It is based on a variant of an on-resonance kicked-rotor system, periodically kicked by two optical lattice potentials of the same lattice constant, but with unequal amplitudes and a fixed phase shift between them. The dependence of the ratchet current acceleration rate on the system parameters is studied in detail. The cold-atom version of our new quantum ratchet accelerator model should be realizable by introducing slight modifications to current cold-atom experiments.
Gong Jiangbin
Wang Jeffrey
No associations
LandOfFree
Quantum Ratchet Accelerator without a Bichromatic Lattice Potential does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum Ratchet Accelerator without a Bichromatic Lattice Potential, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Ratchet Accelerator without a Bichromatic Lattice Potential will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-97397