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quant-ph2021★ 1 cited
Lindblad evolution without the sign problem
Tomoya Hayata
Quantum Monte Carlo is one of the most powerful numerical tools for studying nonpeturbative properties of quantum many-body systems. However, its application to real-time problems…
quant-ph2021
Diagnosis of information scrambling from Hamiltonian evolution under decoherence
Tomoya Hayata, Yoshimasa Hidaka, Yuta Kikuchi
We apply a quantum teleportation protocol based on the Hayden-Preskill thought experiment to quantify how scrambling a given quantum evolution is. It has an advantage over the dire…
quant-ph2010
Rescaled Perturbation Theory
Tomoya Hayata
A non-perturbative method which can go beyond the weak coupling perturbation theory is introduced. Essential idea is to formulate a set of exact differential equations as a functio…