518 citations · 2.1k across the 45 of their papers we have counts for
45 papers
Gyromagnetic Quantum Friction in Rayleigh Vorticity Baths
Mamoru Matsuo, Ryotaro Sano, Ai Yamakage +2
We identify an intrinsic zero-temperature relaxation channel for near-surface spins gyromagnetically coupled to Rayleigh-wave vorticity. This surface-mode contribution requires no…
Demonstration of a quantum comparator on an ion-trap quantum device
Tatsuhiko N. Ikeda, Riku Nakama, Shunsuke Saeki +4
Quantum computers are believed to solve a class of computational problems that are based on modular arithmetic faster than classical computers. Among the arithmetic building blocks…
Floquet theory and applications in open quantum and classical systems
Masahiro Sato, Tatsuhiko N. Ikeda
This article reviews theoretical methods for analyzing Floquet engineering (FE) phenomena in open (dissipative) quantum or classical systems, with an emphasis on our recent results…
Unpolarized prethermal discrete time crystal
Takeru Yokota, Tatsuhiko N. Ikeda
Prethermal discrete time crystals (DTCs) are a novel phase of periodically driven matter that exhibits robust subharmonic oscillations without requiring disorder. However, previous…
Explicit error bounds with commutator scaling for time-dependent product and multi-product formulas
Kaoru Mizuta, Tatsuhiko N. Ikeda, Keisuke Fujii
Product formula (PF), which approximates the time evolution under a many-body Hamiltonian by the product of local time evolution operators, is one of the central approaches for sim…
Exact spectral form factors of non-interacting fermions with Dyson statistics
Tatsuhiko N. Ikeda, Lev Vidmar, Michael O. Flynn
The spectral form factor (SFF) is a powerful diagnostic of random matrix behavior in quantum many-body systems. We introduce a family of random circuit ensembles whose SFFs can be…
Single-Particle Universality of the Many-Body Spectral Form Factor
Michael O. Flynn, Lev Vidmar, Tatsuhiko N. Ikeda
We consider systems of fermions evolved by non-interacting unitary circuits with correlated on-site potentials. When these potentials are drawn from the eigenvalue distribution of…
A Quantum-Resistant Photonic Hash Function
Tomoya Hatanaka, Rikuto Fushio, Masataka Watanabe +3
We propose a quantum hash function based on Gaussian boson sampling on a photonic quantum computer, aiming to provide quantum-resistant security. Extensive simulations demonstrate…
Robust effective ground state in a nonintegrable Floquet quantum circuit
Tatsuhiko N. Ikeda, Sho Sugiura, Anatoli Polkovnikov
An external periodic (Floquet) drive is believed to bring any initial state to the featureless infinite temperature state in generic nonintegrable isolated quantum many-body system…
Floquet systems with continuous dynamical symmetries: characterization, time-dependent Noether charge, and solvability
Yukio Kaneko, Tatsuhiko N. Ikeda
We study quantum Floquet (periodically-driven) systems having continuous dynamical symmetry (CDS) consisting of a time translation and a unitary transformation on the Hilbert space…
Measuring Trotter error and its application to precision-guaranteed Hamiltonian simulations
Tatsuhiko N. Ikeda, Hideki Kono, Keisuke Fujii
Trotterization is the most common and convenient approximation method for Hamiltonian simulations on digital quantum computers, but estimating its error accurately is computational…
Minimum Trotterization Formulas for a Time-Dependent Hamiltonian
Tatsuhiko N. Ikeda, Asir Abrar, Isaac L. Chuang +1
When a time propagator for duration consists of two noncommuting parts , Trotterization approximately decomposes the propagator into a product of exponential…
Conformality of Charge Density Wave
Keiji Nakatsugawa, Tatsuhiko N. Ikeda, Takeshi Toshima +1
New quantum phenomena are continuously being discovered in 2D systems. In particular, the charge density wave (CDW) has the aspect of a quantum crystal with a macroscopic wave func…
Exciton-coherence generation through diabatic and adiabatic dynamics of Floquet state
Kento Uchida, Satoshi Kusaba, Kohei Nagai +2
Floquet engineering of electronic systems is a promising way of controlling quantum material properties on an ultrafast time scale. So far, the energy structure of Floquet states i…
Floquet-Landau-Zener interferometry: Usefulness of the Floquet theory in pulse-laser-driven systems
Tatsuhiko N. Ikeda, Satoshi Tanaka, Yosuke Kayanuma
We develop the Landau-Zener transfer matrix theory for the instantaneous Floquet states (IFSs) for quantum systems driven by strong pulse lasers. Applying this theory to the pulse…
Stimulated Rayleigh Scattering Enhanced by a Longitudinal Plasma Mode in a Periodically Driven Dirac Semimetal CdAs
Yuta Murotani, Natsuki Kanda, Tatsuhiko N. Ikeda +6
Using broadband (12-45 THz) multi-terahertz spectroscopy, we show that stimulated Rayleigh scattering dominates the transient optical conductivity of cadmium arsenide, a Dirac semi…
Criticality and Rigidity of Dissipative Discrete Time Crystals in Solids
Koki Chinzei, Tatsuhiko N. Ikeda
We consider a dissipative quantum Ising model periodically driven by a train of -pulses and investigate dissipative discrete time crystals (DTCs) in solids. In this model, the i…
Nonequilibrium steady states in the Floquet-Lindblad systems: van Vleck's high-frequency expansion approach
Tatsuhiko N. Ikeda, Koki Chinzei, Masahiro Sato
Nonequilibrium steady states (NESSs) in periodically driven dissipative quantum systems are vital in Floquet engineering. We develop a general theory for high-frequency drives with…
Analytical WKB theory for high-harmonic generation and its application to massive Dirac electrons
Hidetoshi Taya, Masaru Hongo, Tatsuhiko N. Ikeda
We propose an analytical approach to high-harmonic generation (HHG) for nonperturbative low-frequency and high-intensity fields based on the (Jeffreys-)Wentzel-Kramers-Brillouin (W…
Fermi's golden rule for heating in strongly driven Floquet systems
Tatsuhiko N. Ikeda, Anatoli Polkovnikov
We study heating dynamics in isolated quantum many-body systems driven periodically at high frequency and large amplitude. Combining the high-frequency expansion for the Floquet Ha…
Linear and Nonlinear Optical Responses in Kitaev Spin Liquids
Minoru Kanega, Tatsuhiko N. Ikeda, Masahiro Sato
We theoretically study THz-light-driven high-harmonic generation (HHG) in the spin-liquid states of the Kitaev honeycomb model with a magnetostriction coupling between spin and ele…
High-order nonlinear optical response of a twisted bilayer graphene
Tatsuhiko N. Ikeda
Focusing on the twist angle for the minimal commensurate structure, we perform nonperturbative calculations of electron dynamics in the twisted bilayer graphene (TBG) under intense…
Time Crystals Protected by Floquet Dynamical Symmetry in Hubbard Models
Koki Chinzei, Tatsuhiko N. Ikeda
We investigate an unconventional symmetry in time-periodically driven systems, the Floquet dynamical symmetry (FDS). Unlike the usual symmetries, the FDS gives symmetry sectors tha…
General description for nonequilibrium steady states in periodically driven dissipative quantum systems
Tatsuhiko N. Ikeda, Masahiro Sato
Laser technology has developed and accelerated photo-induced nonequilibrium physics from both scientific and engineering viewpoints. The Floquet engineering, i.e., controlling mate…