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Showing 2020 · quant-phShow all
3 papers · 2 filters
quant-ph2020★ 59 cited
Absence of fast scrambling in thermodynamically stable long-range interacting systems
Tomotaka Kuwahara, Keiji Saito
In this study, we investigate out-of-time-order correlators (OTOCs) in systems with power-law decaying interactions such as , where is the distance. In such systems, th…
quant-ph2020★ 64 cited
Improved thermal area law and quasi-linear time algorithm for quantum Gibbs states
Tomotaka Kuwahara, Álvaro M. Alhambra, Anurag Anshu
One of the most fundamental problems in quantum many-body physics is the characterization of correlations among thermal states. Of particular relevance is the thermal area law, whi…
quant-ph2020★ 131 cited
Sample-efficient learning of quantum many-body systems
Anurag Anshu, Srinivasan Arunachalam, Tomotaka Kuwahara +1
We study the problem of learning the Hamiltonian of a quantum many-body system given samples from its Gibbs (thermal) state. The classical analog of this problem, known as learning…