Topological swing in Bloch oscillations
- URL: http://arxiv.org/abs/2004.14261v2
- Date: Thu, 5 Nov 2020 08:22:43 GMT
- Title: Topological swing in Bloch oscillations
- Authors: L. K. Upreti, C. Evain, S. Randoux, P. Suret, A. Amo, and P. Delplace
- Abstract summary: We report new oscillations of wavepackets in quantum walks subjected to electric fields.
The number of turning points within one Bloch period of these oscillations is found to be governed by the winding of the quasienergy spectrum.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We report new oscillations of wavepackets in quantum walks subjected to
electric fields, that decorate the usual Bloch-Zener oscillations of
insulators. The number of turning points (or sub-oscillations) within one Bloch
period of these oscillations is found to be governed by the winding of the
quasienergy spectrum. Thus, this provides a new physical manifestation of a
topological property of periodically driven systems that can be probed
experimentally. Our model, based on an oriented scattering network, is readily
implementable in photonic and cold atomic setups.
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