论文标题
Bose-Einstein冷凝物中量子混沌的多粒子纠缠动力学
Multiparticle Entanglement Dynamics of Quantum Chaos in a Bose-Einstein condensate
论文作者
论文摘要
我们研究了由被踢动的旋转式哈密顿量支配的被困的bose-Einstein冷凝物的量子渔民信息（QFI）所目睹的粒子键入动力学。通过超出平均场方法对动态进行了研究。我们将这种近似值的有效性的时间尺度与经典的常规区域和混乱区域联系起来，以及经典系统的最大Lyapunov指数。这建立了经典混乱与QFI之间的有效联系。我们最终通过考虑具有诱人的颗粒间相互作用的两种模式的约瑟夫森连接，研究了使用超平均近似值的量子相变的临界点。
We study the particle-entanglement dynamics witnessed by the quantum Fisher information (QFI) of a trapped Bose-Einstein condensate governed by the kicked rotor Hamiltonian. The dynamics is investigated with a beyond mean-field approach. We link the time scales of the validity of this approximation in, both, classical regular and chaotic regions, with the maximum Lyapunov exponents of the classical system. This establishes an effective connection between the classical chaos and the QFI. We finally study the critical point of a quantum phase transition using the beyond mean-field approximation by considering a two-mode bosonic Josephson junction with attractive interparticle interaction.
