| 报告题目 | Spin-orbit coupled BEC: spin measurement and interference |
| 报告人 | Prof. E. Ya. Sherman |
| 报告人单位 | University of Basque Country, SPAIN |
| 报告时间 | 2014-06-24 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | Abstract:
Cold atoms recently became the testbed for studies of spin-orbit coupling phenomena which cannot be seen in solids. It is well-known that spin-orbit coupling leads to a spin-coordinate entanglement producing mixed states in reduced spin subspace. We study two consequences of this entanglement for spin dynamics in Bose-Einstein condensates. First, spin-orbit coupling simulates a von Neumann measurement of a spin ? since spatial separation of spin-up and spin-down states decoheres the spin density matrix and allows one reading the spin with the particle coordinate. We consider measurement of spin of a particle in a magnetic field as can be simulated by dynamics of a spin-orbit coupled BEC and study in detail the effects of decoherence which appear in this measurement [1]. Second, we consider interference of two spin-orbit coupled BECs as determined by mutual orientation of their spins. In addition, we study the effect of a quantum backflow in the spin-dependent interference [2]. These two effects: spin measurement and interference, can be useful for quantum computation with the qubits based on the spin-orbit coupled BECs. [1] E. Ya. Sherman and D. Sokolovski?, New J. Phys. 16 015013 (2014) [2] S. Mardonov, M. Palmero, J.G. Muga, M. Modugno, and E.Ya. Sherman, Europhysics Letters, in print |
