三势阱中玻色量子流体的内禀退相干和纯度
Intrinsic decoherence and purity in a Bose quantum fluid in a triple well potential
摘要：
在精确的N体Bose-哈伯德模型中，考虑一维三势阱中的量子玻色流体，研究了量子流体的内禀退相干和纯度损失现象.我们的研究是通过跟踪N粒子封闭环境中的单体性质的时间演化来完成的。我们做了详尽的探索初始条件来描述这些现象。在这里，我们用一组相关的Fock和SU（3）相干态来说明我们的主要发现。我们的研究表明，签名的平稳性和最大的混合是一个直接的后果，在封闭的系统中的粒子间的相互作用，并成为明显的粒子数量的增加。这一事实是证实量化的偏离平稳性的矩阵范数的装置。
英文摘要：
We consider a quantum Bose fluid confined in a triple well potential in 1D within the exact N-body Bose-Hubbard model to investigate the phenomena of intrinsic decoherence and loss of purity. Our study is done by following the time evolution of one-body properties in an N-particle closed environment. We do an exhaustive exploration of initial conditions to characterize these phenomena. Here we illustrate our main findings with a set of relevant Fock and SU(3) coherent states. Our study shows that signatures of stationarity and maximal mixing are a direct consequence of the inter-particle interactions in the closed system and become evident as the number of particles is increased. This fact is confirmed by quantifying the deviations from stationarity by means of a matrix norm.
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