518 citations · 747 across the 18 of their papers we have counts for
18 papers
Quantum spectroscopy of topological dynamics via a supersymmetric Hamiltonian
Hiroshi Yamauchi, Satoshi Kanno, Yuki Sato +4
Topological data analysis (TDA) characterizes complex dynamics through global invariants, but classical computation becomes prohibitive for high-dimensional data. We reinterpret ti…
Impact of Measurement Noise on Escaping Saddles in Variational Quantum Algorithms
Eriko Kaminishi, Takashi Mori, Michihiko Sugawara +1
Stochastic gradient descent (SGD) is a frequently used optimization technique in classical machine learning and Variational Quantum Eigensolver (VQE). For the implementation of VQE…
Quantum dark solitons in the 1D Bose gas: From single to double dark-solitons
Kayo Kinjo, Eriko Kaminishi, Takashi Mori +3
We study quantum double dark-solitons by constructing corresponding quantum states in the Lieb-Liniger model for the one-dimensional Bose gas. Here we expect that the Gross-Pitaevs…
Simulating Time Evolution with Fully Optimized Single-Qubit Gates on Parameterized Quantum Circuits
Kaito Wada, Rudy Raymond, Yu-ya Ohnishi +4
We propose a novel method to sequentially optimize arbitrary single-qubit gates in parameterized quantum circuits for simulating real and imaginary time evolution. The method utili…
Optimizing Parameterized Quantum Circuits with Free-Axis Selection
Hiroshi C. Watanabe, Rudy Raymond, Yu-ya Ohnishi +2
Variational quantum algorithms, which utilize Parametrized Quantum Circuits (PQCs), are promising tools to achieve quantum advantage for optimization problems on near-term quantum…
Recurrence times of the Lieb-Liniger model in the weak and strong coupling regimes
Eriko Kaminishi, Takashi Mori
Quantum systems exhibit recurrence phenomena after equilibration, but it is a difficult task to evaluate the recurrence time of a quantum system because it drastically increases as…
Construction of quantum dark soliton in one-dimensional Bose gas
Eriko Kaminishi, Takashi Mori, Seiji Miyashita
Dark soliton solutions in the one-dimensional classical nonlinear Schrödinger equation has been considered to be related to the yrast states corresponding to the type-II excitation…
Thermalization and prethermalization in isolated quantum systems: a theoretical overview
Takashi Mori, Tatsuhiko N. Ikeda, Eriko Kaminishi +1
The approach to thermal equilibrium, or thermalization, in isolated quantum systems is among the most fundamental problems in statistical physics. Recent theoretical studies have r…
Entanglement prethermalization in the Tomonaga-Luttinger model
Eriko Kaminishi, Takashi Mori, Tatsuhiko N Ikeda +1
Prethermalization refers to the relaxation to a quasi-stationary state before reaching thermal equilibrium. Recently, it is found that not only local conserved quantities but also…
Entanglement Pre-thermalization in an Interaction Quench between Two Harmonic Oscillators
Tatsuhiko N. Ikeda, Takashi Mori, Eriko Kaminishi +1
Entanglement pre-thermalization (EP) is a quasi-stationary nonequilibrium state of a composite system in which each individual subsystem looks thermal but the entire system remains…
Quantum states of dark solitons in the 1D Bose gas
Jun Sato, Rina Kanamoto, Eriko Kaminishi +1
We present a series of quantum states that are characterized by dark solitons of the nonlinear Schrödinger equation (i.e. the Gross-Pitaevskii equation) for the one-dimensional (1D…
Entanglement prethermalization: Locally thermal but non-locally non-thermal states in a one-dimensional Bose gas
Eriko Kaminishi, Takashi Mori, Tatsuhiko N. Ikeda +1
A well-isolated system often shows relaxation to a quasi-stationary state before reaching thermal equilibrium. Such a prethermalization has attracted considerable interest recently…
Exact quantum dynamics of yrast states in the finite 1D Bose gas
Eriko Kaminishi, Jun Sato, Tetsuo Deguchi
We demonstrate that the quantum dynamics of yrast states in the one-dimensional (1D) Bose gas gives an illustrative example to equilibration of an isolated quantum many-body system…
Recurrence time in the quantum dynamics of the 1D Bose gas
Eriko Kaminishi, Jun Sato, Tetsuo Deguchi
Recurrence time is evaluated for some initial quantum states in the one-dimensional Bose gas with repulsive short-range interactions. In the relatively strong and weak coupling cas…
Finite-size scaling behavior of Bose-Einstein condensation in the 1D Bose gas
Jun Sato, Eriko Kaminishi, Tetsuo Deguchi
Through exact numerical solutions we show Bose-Einstein condensation (BEC) for the one-dimensional (1D) bosons with repulsive short-range interactions at zero temperature by taking…
Quantum dark solitons in the 1D Bose gas and the superfluid velocity
Jun Sato, Rina Kanamoto, Eriko Kaminishi +1
We give explicit connections of quantum one-hole excited states to classical solitons for the one-dimensional Bose gas with repulsive short-range interactions. We call the quantum…
Exact relaxation dynamics of a localized many-body state in the 1D bose gas
Jun Sato, Rina Kanamoto, Eriko Kaminishi +1
Through an exact method we numerically solve the time evolution of the density profile for an initially localized state in the one-dimensional bosons with repulsive short-range int…
Exact Yrast Spectra of Cold Atoms on a Ring
Eriko Kaminishi, Rina Kanamoto, Jun Sato +1
We propose a methodology to construct excited states with a fixed angular momentum, namely, "yrast excited states" of finite-size one-dimensional bosonic systems with periodic boun…