Measuring entropy and mutual information in the two-dimensional Hubbard model
Measuring entropy and mutual information in the two-dimensional Hubbard model
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测量二维哈伯德模型中的熵和互信息
DOI:
10.1103/physrevx.7.031025
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发表时间:
--
期刊:
影响因子:
--
通讯作者:
M. Köhl
中科院分区:
文献类型:
--
作者:
E. Cocchi;L. A. Miller;J. H. Drewes;C. F. Chan;D. Pertot;F. Brennecke;M. Köhl
We measure entropy and short-range correlations of ultracold fermionic atoms in an optical lattice for a range of interaction strengths, temperatures, and fillings. In particular, we extract the mutual information between a single lattice site and the rest of the system from a comparison between the reduced density matrix of a single lattice site and the thermodynamic entropy. Moreover, we determine the single-particle density matrix between nearest neighbors from thermodynamic observables and show that even in a strongly interacting Mott insulator fermions are significantly delocalized over short distances in the lattice.
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