Quantum Ratchets

  title={Quantum Ratchets},
  author={M. Grifoni},
  pages={2229 - 2229}
  • M. Grifoni
  • Published 17 December 1999
  • Physics
  • Science
We investigate quantum Brownian motion in adiabatically rocked ratchet systems. Above a cross temperatureTc tunneling events are rare, yet they already substantially enhance the classical par current. BelowTc, quantum tunneling prevails and the classical predictions grossly underestimate transport. Upon approaching T ­ 0 the quantum current exhibits a tunneling induced reversal, an tends to a finite limit. [S0031-9007(97)03540-0] 

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