Over the last decade there have been many advances in studies of quantum walks (QWs) including a momentum-space QW recently realized in our spinor Bose-Einstein condensate system. This QW possessed behaviors that generally agreed with theoretical predictions; however, it also showed momentum distributions that were not adequately explained by the theory. We present a theoretical model which proves that the coherent dynamics of the spinor condensate is sufficient to explain the experimental data without invoking the presence of a thermal cloud of atoms as in the original theory. Our numerical findings are supported by an analytical prediction for the momentum distributions in the limit of zero-temperature condensates. This current model provides more complete explanations to the momentum-space QWs that can be applied to study quantum search algorithms and topological phases in Floquet-driven systems.

Light-shift-induced behaviors observed in momentum-space quantum walks / Bolik, N.; Groiseau, C.; Clark, J. H.; Gresch, A.; Dadras, S.; Summy, G. S.; Liu, Y.; Wimberger, S.. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 106:3(2022). [10.1103/PhysRevA.106.033307]

Light-shift-induced behaviors observed in momentum-space quantum walks

Groiseau C.
Software
;
Wimberger S.
Supervision
2022-01-01

Abstract

Over the last decade there have been many advances in studies of quantum walks (QWs) including a momentum-space QW recently realized in our spinor Bose-Einstein condensate system. This QW possessed behaviors that generally agreed with theoretical predictions; however, it also showed momentum distributions that were not adequately explained by the theory. We present a theoretical model which proves that the coherent dynamics of the spinor condensate is sufficient to explain the experimental data without invoking the presence of a thermal cloud of atoms as in the original theory. Our numerical findings are supported by an analytical prediction for the momentum distributions in the limit of zero-temperature condensates. This current model provides more complete explanations to the momentum-space QWs that can be applied to study quantum search algorithms and topological phases in Floquet-driven systems.
2022
Light-shift-induced behaviors observed in momentum-space quantum walks / Bolik, N.; Groiseau, C.; Clark, J. H.; Gresch, A.; Dadras, S.; Summy, G. S.; Liu, Y.; Wimberger, S.. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 106:3(2022). [10.1103/PhysRevA.106.033307]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2932160
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