Cavendish Laboratory, University of Cambridge, JJ Thompson Avenue, Cambridge CB3 0HE, United Kingdom.
Phys Rev Lett. 2009 Oct 9;103(15):150601. doi: 10.1103/PhysRevLett.103.150601. Epub 2009 Oct 8.
We investigate the propagation of spin impurity atoms through a strongly interacting one-dimensional Bose gas. The initially well localized impurities are accelerated by a constant force, very much analogous to electrons subject to a bias voltage, and propagate as a one-dimensional impurity spin wave packet. We follow the motion of the impurities in situ and characterize the interaction induced dynamics. We observe a very complex nonequilibrium dynamics, including the emergence of large density fluctuations in the remaining Bose gas, and multiple scattering events leading to dissipation of the impurity's motion.
我们研究了自旋杂质原子在强相互作用一维玻色气体中的传播。最初局域性很好的杂质原子受到恒定力的加速，非常类似于受到偏置电压的电子，并作为一维杂质自旋波包传播。我们在原位跟踪杂质的运动并对诱导的相互作用动力学进行了表征。我们观察到了非常复杂的非平衡动力学，包括剩余玻色气体中出现的大密度涨落，以及导致杂质运动耗散的多次散射事件。
