Experimental Realization of a Quantum Ratchet Through Phase Modulation
arXiv:1308.6008 · doi:10.1103/PhysRevA.88.063603
Abstract
We report on an experimental realization of unidirectional transporting island structures in an otherwise chaotic phase space of the delta-kicked rotor system. Using a Bose-Einstein Condensate as a source of ultracold atoms, we employ asymmetric phase modulation in the kicks, with the narrow momentum distribution of the atoms allowing us to address individual island structures. We observe quantum ratchet behavior in this system, with clear directed momentum current in the absence of a directional force, which we characterize and connect to ε-classical theory.
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- Hamiltonian ratchets with ultra-cold atoms
- Phase Noise in the Delta Kicked Rotor: From Quantum to Classical
- Initial state dependence of a quantum-resonance ratchet
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