Spontaneous-emission induced ratchet in atom-optics kicked rotor quantum walks
arXiv:2402.13218 · doi:10.1103/PhysRevA.109.063307
Abstract
Quantum walks have gained significant attention over the past decades, mainly because of their variety of implementations and applications. Atomic quantum walks are typically subject to spontaneous emissions arising from the control fields. We investigate spontaneous emission in an atom optics kicked rotor quantum walk. Here, spontaneous emission occurs naturally due to the driving by the kicks, and it is generally viewed as a nuisance in the experiment. We find, however, that spontaneous emission may induce asymmetries in an otherwise symmetric quantum walk. Our results underscore the utility of spontaneous emission and the application of the asymmetric evolution in the walker's space, i.e. for the construction of a quantum walk ratchet or for Parrondo-like quantum games. This highlights the potential for reinterpreting seemingly adverse effects as beneficial under certain conditions, thus broadening the scope of quantum walks and their applications.
References in corpus (13)
- Quantum walks of correlated particles
- Quantum Walk in Position Space with Single Optically Trapped Atoms
- Realization of quantum walks with negligible decoherence in waveguide lattices
- Strongly Correlated Quantum Walks in Optical Lattices
- Quantum resonances and decoherence for delta-kicked atoms
- Rectified momentum transport for a kicked Bose-Einstein Condensate
- Implementing the one-dimensional quantum (Hadamard) walk using a Bose-Einstein Condensate
- Digital atom interferometer with single particle control on a discretized spacetime geometry
- Hamiltonian ratchets with ultra-cold atoms
- Initial state dependence of a quantum-resonance ratchet
- Parrondo's paradox for discrete-time quantum walks in momentum space
- Suppression of decoherence effects in the quantum kicked rotor
- Classical model for survival resonances close to Talbot time