Quantum Simulation with Ultra-Cold Bosons

Principal investigator
Introduction

Because of their high controllability, ultra-cold atoms offer a great platform to simulate certain problems arise from condense matter system. In our lab, a variety of cooling techniques are used to cool down Rubidium 87 to make Bose-Einstein Condensate. The BEC is then transferred into certain system of a specific Hamiltonian which is induced by Raman couplings, optical lattice, etc. We then use this as a simulation platform to study Gauge field and Spin-orbit coupling.
Our current research interest is topological phase transition and Exotic topological quantum states. There are intriguing topological phenomenon observed in condense matter system in recent years. Spin-orbit coupling is believed to be essential in understanding topological quantum states and a new class of topological materials. Thus, spin-orbit coupling system of the cold atoms has a great potential to study exotic quantum states and is promising to reveal physics beyond traditional condense matter system.

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Related Publications

  • 1.
    Sun, W., Wang, B.- zong, Xu, X.-T., Yi, C.-R., Zhang, L., Wu, Z., Deng, Y., Liu, X.- jun, Chen, S. & Pan, J.-W. Highly Controllable and Robust 2D Spin-Orbit Coupling for Quantum Gases. Physical Review Letters 121, 150401 (2018).
  • 1.
    Long, J.-B., Yang, S.-J., Chen, S. & Pan, J.-W. Magnetic-enhanced modulation transfer spectroscopy and laser locking for 87 Rb repump transition. Optics Express 26, 27773 (2018).
  • 1.
    Xu, X.-T., Yi, C.-R., Wang, B.- zong, Sun, W., Deng, Y., Liu, X.- jun, Chen, S. & Pan, J.-W. Precision mapping the topological bands of 2D spin-orbit coupling with microwave spin-injection spectroscopy. Science Bulletin 63, 1464–1469 (2018).
  • 1.
    Sun, W., Yi, C.-R., Wang, B.- zong, Zhang, W.-W., Sanders, B., Xu, X.-T., Wang, Z.-Y., Schmiedmayer, J., Deng, Y., Liu, X.- jun, Chen, S. & Pan, J.-W. Uncover Topology by Quantum Quench Dynamics. Physical Review Letters 121, 250403 (2018).
  • 1.
    Wu, Z., Zhang, L., Sun, W., Xu, X.-T., Wang, B.-Z., Ji, S.-C., Deng, Y., Chen, S., Liu, X.-J. & Pan, J.-W. Realization of two-dimensional spin-orbit coupling for Bose-Einstein condensates. Science 354, 83–88 (2016).
  • 1.
    Ji, S.-C., Zhang, L., Xu, X.-T., Wu, Z., Deng, Y., Chen, S. & Pan, J.-W. Softening of Roton and Phonon Modes in a Bose-Einstein Condensate with Spin-Orbit Coupling. Physical Review Letters 114, 105301 (2015).
  • 1.
    Ji, S.-C., Zhang, J.-Y., Zhang, L., Du, Z.-D., Zheng, W., Deng, Y., Zhai, H., Chen, S. & Pan, J.-W. Experimental determination of the finite-temperature phase diagram of a spin-orbit coupled Bose gas. Nature Physics 10, 314–320 (2014).
  • 1.
    Zhang, L., Zhang, J.-Y., Ji, S.-C., Du, Z.-D., Zhai, H., Deng, Y., Chen, S., Zhang, P. & Pan, J.-W. Stability of excited dressed states with spin-orbit coupling. Physical Review A 87, 011601 (2013).
  • 1.
    Zhang, J.-Y., Ji, S.-C., Chen, Z., Zhang, L., Du, Z.-D., Yan, B., Pan, G.-S., Zhao, B., Deng, Y., Zhai, H., Chen, S. & Pan, J.-W. Collective Dipole Oscillations of a Spin-Orbit Coupled Bose-Einstein Condensate. Physical Review Letters 109, 115301 (2012).