Multi-band quantum ratchets

Details Multi-band quantum ratchets Multi-band quantum ratchets

2002-08-28

arxiv.org/abs/cond-mat/0208549v1

Phys. Rev. Lett. 89, 146801 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.89.146801

We investigate directed motion in non-adiabatically rocked ratchet systems sustaining few bands below the barrier. Upon restricting the dynamics to the lowest M bands, the total system-plus-bath Hamiltonian is mapped onto a discrete tight-binding model containing all the information both on the intra- and inter-well tunneling motion. A closed form for the current in the incoherent tunneling regime is obtained. In effective single-band ratchets, no current rectification occurs. We apply our theory to describe rectification effects in vortex quantum ratchets devices. Current reversals upon variation of the ac-field amplitude or frequency are predicted.

Affiliated with

Also associated with

No associations

Rating

Multi-band quantum ratchets 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 Multi-band quantum ratchets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-band quantum ratchets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-283477