Volume 106, Number 6, June 2014
|Number of page(s)||6|
|Published online||27 June 2014|
Interference of spin-orbit–coupled Bose-Einstein condensates
1 Department of Physical Chemistry, The University of the Basque Country UPV/EHU - 48080 Bilbao, Spain
2 IKERBASQUE Basque Foundation for Science - Bilbao, 48011 Bizkaia, Spain
3 Department of Physics, Shanghai University - 200444 Shanghai, PRC
4 Departamento de Física Teórica e Historia de la Ciencia, Universidad del País Vasco UPV/EHU 48080 Bilbao, Spain
5 The Samarkand Agriculture Institute - 140103 Samarkand, Uzbekistan
6 The Samarkand State University - 140104 Samarkand, Uzbekistan
Received: 8 January 2014
Accepted: 3 June 2014
Interference of atomic Bose-Einstein condensates, observed in free expansion experiments, is a basic characteristic of their quantum nature. The ability to produce synthetic spin-orbit coupling in Bose-Einstein condensates has recently opened a new research field. Here we theoretically describe the interference of two noninteracting spin-orbit–coupled Bose-Einstein condensates in an external synthetic magnetic field. We demonstrate that the spin-orbit and the Zeeman couplings strongly influence the interference pattern determined by the angle between the spins of the condensates, as can be seen in time-of-flight experiments. We show that a quantum backflow, being a subtle feature of the interference, is, nevertheless, robust against the spin-orbit coupling and applied synthetic magnetic field.
PACS: 03.75.-b – Matter waves / 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect / 42.25.Hz – Interference
© EPLA, 2014
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