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Showing 2019 · quant-phShow all
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quant-ph2019★ 112 cited
Strictly linear light cones in long-range interacting systems of arbitrary dimensions
Tomotaka Kuwahara, Keiji Saito
In locally interacting quantum many-body systems, the velocity of information propagation is finitely bounded and a linear light cone can be defined. Outside the light cone, the am…
quant-ph2019★ 80 cited
Clustering of conditional mutual information for quantum Gibbs states above a threshold temperature
Tomotaka Kuwahara, Kohtaro Kato, Fernando G. S. L. Brandão
We prove that the quantum Gibbs states of spin systems above a certain threshold temperature are approximate quantum Markov networks, meaning that the conditional mutual informatio…
quant-ph2019★ 55 cited
Area law of non-critical ground states in 1D long-range interacting systems
Tomotaka Kuwahara, Keiji Saito
The area law for entanglement provides one of the most important connections between information theory and quantum many-body physics. It is not only related to the universality of…