Research
Publications / International conferences / Domestic conferences
Publications
Systematic construction of asymptotic quantum many-body scar states and their relation to supersymmetric quantum mechanics
Masaya Kunimi, Yusuke Kato, and Hosho Katsura
Identification of Phase Plate Properties Using Photonic Quantum Sensor Networks
Yusuke Machida, Hiroki Kuji, Yuichiro Mori, Hideaki Kawaguchi, Takashi Imoto, Yuki Takeuchi, Miku Ishizaki, Yuichiro Matsuzaki
Quantum Circuit Learning Using Non-Integrable System Dynamics
Ryutaro Sato, Yasuhiro Aota, Takaharu Yoishida, Hideaki Kawaguchi, Yuichiro Mori, Hiroki Kuji, Yuichiro Matsuzaki
Hardware-efficient quantum annealing with error mitigation via classical shadow
Takaharu Yoshida, Yuta Shingu, Chihaya Shimada, Tetsuro Nikuni, Hideaki Hakoshima, Yuichiro Matsuzaki
Variational quantum-neural hybrid imaginary time evolution
Hiroki Kuji, Tetsuro Nikuni, and Yuta Shingu
Robustness of the avian compass function described by radical pair model against biomagnetic noise
Tokio Yoshida, Masaya Kunimi, and Tetsuro Nikuni
Observation of slow relaxation due to Hilbert space fragmentation in strongly interacting Bose-Hubbard chains
Kantaro Honda, Yosuke Takasu, Shimpei Goto, Hironori Kazuta, Masaya Kunimi, Ippei Danshita, and Yoshiro Takahashi
[Sci. Adv. 11 eadv3255 (2025).]
Robust phase estimation of the ground-state energy without controlled time evolution on a quantum device
Hiroki Kuji, Yuta Shingu, Tetsuro Nikuni, Takashi Imoto, Kenji Sugisaki, Yuichiro Matsuzaki
[Phys. Rev. A 111, 042618 (2025).]
Proposal for experimental realization of quantum spin chains with quasiperiodic interaction using Rydberg atoms
Takaharu Yoshida, Masaya Kunimi, Tetsuro Nikuni
TCAD analysis of conditions for DIBL parameter misestimation in cryogenic MOSFETs
Yuika Kobayashi, Hidehiro Asai, Shota Iizuka, Junichi Hattori, Tsutomu Ikegami, Koichi Fukuda, Tetsuro Nikuni and Takahiro Mori
[Jpn. J. Appl. Phys. 63 094001]
Proposal for realizing quantum-spin systems on a two-dimensional square lattice with Dzyaloshinskii-Moriya interaction by the Floquet engineering using Rydberg atoms
Hiroki Kuji, Masaya Kunimi, Tetsuro Nikuni
Generation of a metrologically useful cat state through repetitive measurements
Mamiko Tatsuta, Yuichiro Matsuzaki, Hiroki Kuji, Akira Shimizu
Universal scaling laws of quantum spatial search in complex networks
Rei Sato, Tetsuro Nikuni, Kayoko Nohara, Giorgio Salani, Shohei Watabe
[Phys. Rev. Res. 6, 043119 (2024).]
Embedding All Feasible Solutions of Traveling Salesman Problem by Divide-and-Conquer Quantum Search
Rei Sato, Kazuhiro Saito, Tetsuro Nikuni, Shohei Watabe
[2023 IEEE International Conference on Quantum Computing and Engineering (QCE), 270-271 (2023)]
Strong Spin-Motion Coupling in the Ultrafast Dynamics of Rydberg Atoms
Vineet Bharti, Seiji Sugawa, Masaya Kunimi, Vikas Singh Chauhan, Tirumalasetty Panduranga Mahesh, Michiteru Mizoguchi, Takuya Matsubara, Takafumi Tomita, Sylvain de Léséleuc, Kenji Ohmori
[Phys. Rev. Lett. 133, 093405 (2024).]
Simulation method for evaporative cooling of trapped Bose gases at finite temperatures
Emiko Arahata, Tetsuro Nikuni
Collective excitations of a Bose-condensed gas: Fate of second sound in the crossover regime between hydrodynamic and collisionless regimes
Hoshu Hiyane, Shohei Watabe, Tetsuro Nikuni
[Physical Review A 109, 033302 (2024) ]
Picosecond-Scale Ultrafast Many-Body Dynamics in an Ultracold Rydberg-Excited Atomic Mott Insulator
Vineet Bharti, Seiji Sugawa, Michiteru Mizoguchi, Masaya Kunimi, Yichi Zhang, Sylvain de Léséleuc, Takafumi Tomita, Titus Franz, Matthias Weidemüller, and Kenji Ohmori
[Phys. Rev. Lett. 131, 123201 (2023)]
Quantum many-body scars in the Bose-Hubbard model with a three-body constraint
Ryui Kaneko, Masaya Kunimi, and Ippei Danshita
[Phys. Rev. A 109, L011301 (2024) ]
Proposal for simulating quantum spin models with the Dzyaloshinskii-Moriya interaction using Rydberg atoms and the construction of asymptotic quantum many-body scar states
Masaya Kunimi, Takafumi Tomita, Hosho Katsura, and Yusuke Kato
[Phys. Rev. A 110, 043312 (2024) ]
Transverse Field Dependence of the Ground State in the Z2 Bose-Hubbard Model
Yuma Watanabe, Shohei Watabe, and Tetsuro Nikuni
[JPS Conf. Proc. 38, 011012 (2023) ]
Analysis of the shortest vector problems with quantum annealing to search the excited states
Katsuki Ura, Takashi Imoto, Tetsuro Nikuni, Shiro Kawabata, and Yuichiro Matsuzaki
[Jpn. J. Appl. Phys. 62 SC1090 (2023) ]
Quantum state tomography for Kerr parametric oscillators
Yuta Suzuki, Shiro Kawabata, T. Yamamoto, and Shumpei Masuda
Persistent-current states originating from the Hilbert space fragmentation in momentum space
Masaya Kunimi and Ippei Danshita
[Phys. Rev. A 108, 063316 (2023) ]
Observing phase jumps of solitons in Bose-Einstein condensates
Kazuma Ohi, Shohei Watabe, and Tetsuro Nikuni
[Phys. Rev. A 106, 053302 (2022)]
Quantum annealing with error mitigation
Yuta Shingu, Tetsuro Nikuni, Shiro Kawabata, and Yuichiro Matsuzaki
[Phys. Rev. A 109, 042606 (2024) ]
Measurement-based state preparation of Kerr parametric oscillators
Yuta Suzuki, Shohei Watabe, Shiro Kawabata, and Shumpei Masuda
Analysis of Shape Change of Droplet in Dipolar Bose–Hubbard Model
Kazuhiro Tamura, Shohei Watabe, and Tetsuro Nikuni
[J. Low Temp. Phys. 208 365 (2022)]
Josephson Oscillation and Self-Trapping in a Fermi Superfluid Gas across the BCS-BEC Crossover
Jun Tokimoto, Shunji Tsuchiya, and Tetsuro Nikuni
[J. Low Temp. Phys. 208 372 (2022)]
Variational secure cloud quantum computing
Yuta Singu, Yuki Takeuchi, Suguru Endo, Shiro Kawabata, Shohei Watabe, Tetsuro Nikuni, Hideaki Hakoshima, and Yuichiro Matsuzaki
[Phys. Rev. A 105, 022603 (2022)]
Boltzmann machine learning with a variational quantum algorithm
Yuta Singu, Yuya Seki, Shohei Watabe, Suguru Endo, Yuichiro Matsuzaki, Shiro Kawabata, Tetsuro Nikuni, and Hideaki Hakoshima
[Phys. Rev. A 104, 032413 (2021)]
Numerical Simulation: Fluctuation in Background Synaptic Activity Regulates Synaptic Plasticity
Yuto Takeda, Katsuhiko Hata, Tokio Yamazaki, Masaki Kaneko, Osamu Yokoi, Chengta Tsai, Kazuo Umemura, and Tetsuro Nikuni
[Frontiers in Systems Neuroscience 15, 771661 (2021)]
Propagation of phase-imprinted solitons from superfluid core to Mott-insulator shell and superfluid shell
Yuma Watanabe, Shohei Watabe, and Tetsuro Nikuni
[Phys. Rev. A 104, 043314 (2021)]
Efficient criteria of quantumness for a large system of qubits
Shohei Watabe, Michael Zach Serikow, Shiro Kawabata, and Alexandre Zagoskin
[Front. Phys. 9:773128 (2022)]
Hugenholtz-Pines theorem for multicomponent Bose-Einstein condensates
Shohei Watabe
[Phys. Rev. A 103, 053307 (2021)]
Enhancing quantum annealing performance by a degenerate two-level system
Shohei Watabe, Yuya Seki, and Shiro Kawabata
[Scientific Reports 10, 146 (2020)]
Strong connection between single-particle and density excitations in Bose-Einstein condensates
Shohei Watabe
[New J. Phys. 22, 103010 (2020)]
Identities and Many-Body Approaches in Bose-Einstein Condensates
Shohei Watabe
[Acta Physica Polonica A 135, 1222 (2019)]
Hidden multiparticle excitation in a weakly interacting Bose-Einstein condensate
Shohei Watabe
[Phys. Rev. A 97, 033606 (2018)]
Dipole Mode of Trapped Bose-Fermi Mixture Gas
Yoji Asano, Shohei Watabe, and Tetsuro Nikuni
[J. Low Temp. Phys. 201, 58 (2020)]
Dipole oscillation of a trapped Bose-Fermi-mixture gas in collisionless and hydrodynamic regimes
Yoji Asano, Shohei Watabe, and Tetsuro Nikuni
[Phys. Rev. A 101, 013611 (2020)]
Multicoding in neural information transfer suggested by mathematical analysis of the frequency-dependent synaptic plasticity in vivo
Katsuhiko Hata, Osamu Araki, Osamu Yokoi, Tatsumi Kusakabe, Yoshio Yamamoto, Susumu Ito, and Tetsuro Nikuni
[Scientific Reports 10, 13974 (2020)]
Scaling Hypothesis of Spatial Search on Fractal Lattice Using Quantum Walk
Rei Sato, Tetsuro Nikuni, and Shohei Watabe
[Phys. Rev. A 101, 022312 (2020)]
Collective excitations in Bose-Fermi mixtures
Yoji Asano, Masato Narushima, Shohei Watabe, and Tetsuro Nikuni
[J. Low Temp. Phys. 196, 133 (2019)]
Excitation of the Higgs Mode in a Superfluid Fermi Gas in the BCS-BEC Crossover
Jun Tokimoto, Shunji Tsuchiya, and Tetsuro Nikuni
[J. Phys. Soc. Jpn. 88, 023601 (2019)]
Density and spin modes in imbalanced normal Fermi gases from collisionless to hydrodynamic regime
Masato Narushima, Shohei Watabe, and Tetsuro Nikuni
[J. Phys. B:At. Mol. Opt. Phys. 51, 055202 (2018)]
Spatial Search on Sierpinski Carpet Using Quantum Walk
Shu Tamegai, Shohei Watabe, and Tetsuro Nikuni
[J. Phys. Soc. Jpn. 87, 085003 (2018)]
Formation of Vortex Lattices in Superfluid Bose Gases at Finite Temperatures
Emiko Arahata and Tetsuro Nikuni
[J. Low Temp. Phys. 183, 191 (2016).]
Fano resonance through Higgs bound states in tunneling of Nambu-Goldstone modes
Takeru Nakayama, Ippei Danshita, Tetsuro Nikuni, and Shunji Tsuchiya
[Phys. Rev. A 92, 043610 (2015)]
Elementary Excitations of Antiferromagnetic Spin-1 Bosons in an Optical Lattice
M. Shinozaki, S. Tsuchiya, S. Abe ,T. Ozaki, and T. Nikuni
[J. Low Temp. Phys. 183, 191 (2016).]
Propagation of First and Second Sound in a Highly-Elongated Trapped Bose Condensed Gas at Finite temperatures
Emiko Arahata and T. Nikuni
[Phys. Rev. A 87, 033610 (2013).]
Exact Analysis of a One-Dimensional Weakly Repulsive Bose-Fermi Mixture
T. Kaminaka, J. Sato, and T. Nikuni
[J. Low Temp. Phys. 175, 287 (2014).]
Theory of the Two-Particle Emission from Superfluid Fermi Gases in the BCS-BEC Crossover
Emiko Arahata and Tetsuro Nikuni
[Phys. Rev. A 90, 043601 (2014).]
Dynamical Simulation of Sound Propagation in a Highly Elongated Trapped Bose Gas at Finite Temperatures
Emiko Arahata and Tetsuro Nikuni
[J. Low Temp. Phys. 171, 369 (2013)]
The Higgs mode in a superfluid of Dirac fermions
Shunji Tsuchiya, R. Ganesh, and Tetsuro Nikuni
[Phys. Rev. B 88, 014527 (2013)]
Properties of the Trapped Dipolar Ultracold Gases at Finite Temperatures
Yuki Endo and Tetsuro Nikuni
[J. Phys.:Conf. Ser. 400, 012009 (2012)]
Dynamic Structure Factor of Normal Fermi Gas from Collisionless to Hydrodynamic Regime
Shohei Watabe and Tetsuro Nikuni
[Phys. Rev. B 82, 033622 (2010)]
Nonlinear mixing of collective modes in harmonically trapped Bose-Einstein condensates
Takahiro Mizoguchi, Shohei Watabe, and Tetsuro Nikuni
[Phys. Rev. A 95, 033623 (2017)]
Higgs mode in a Trapped Superfluid Fermi Gas
Jun Tokimoto, Shunji Tsuchiya, and Tetsuro Nikuni
[J. Low Temp. Phys. Online First(2017)]
Flow-Induced Charge Modulation in Superfluid Atomic Fermions Loaded an Optical Kagome Lattice
Daisuke Yamamoto, Chika Sato, Tetsuro Nikuni,and Shunji Tsuchiya
[Phys. Rev. Lett. 110, 145304 (2013)]
First-order phase transition and anomalous hysteresis of Bose gases in optical lattices
Daisuke Yamamoto, Takeshi Ozaki, Carlos A. R. Sá de Melo, Ippei Danshita
[Phys. Rev. A 88, 033624 (2013)]
Bose-Bose mixtures in an optical lattice: First-order superfluid-insulator transition and elementary excitations
Takeshi ozaki, Ippei Danshita, and Tetsuro Nikuni
Coexistence of superfluid gap and pseudogap in the BCS-BEC crossover regime of a trapped Fermi gas below Tc
R. Watanabe, S. Tsuchiya, and Y. Ohashi
Superfluidity of Dirac Fermions in a Tunable Honeycomb Lattice: Cooper Pairing, Collective Modes, and Critical Currents
S. Tsuchiya, R. Ganesh, and A. Paramekanti
[Phys. Rev. A 86, 033604 (2012)]
Detecting the superfluid critical momentum of Bose gases in optical lattices through dipole oscillations
Takuya Saito, Ippei Danshita, Takeshi Ozaki, Tetsuro Nikuni
[Phys. Rev. A 86, 023623 (2012)]
Two-dimensional pseudogap effects of an ultracold Fermi gas in the BCS-BEC crossover region
R. Watanabe, S. Tsuchiya, and Y. Ohashi
Fermionic solutions of chiral Gross-Neveu and Bogoliubov-de Gennes systems in nonlinear Schrodinger hierarchy
D. A. Takahashi, S. Tsuchiya, R. Yoshii, and M. Nitta
Pseudogap temperature and effects of a harmonic trap in the BCS-BEC crossover regime of an ultracold Fermi gas
S. Tsuchiya, R. Watanabe, and Y. Ohashi
[Phys. Rev. A 84, 043647 (2011)]
Single-Particle Spectral Density of a Bose Gas in the Two-Fluid Hydrodynamic Regime
Emiko Arahata, Tetsuro Nikuni, Allan Griffin
\(\pi\)-junction and spontaneous current state in a superfluid Fermi gas
T. Kashimura, S. Tsuchiya, and Y. Ohashi
[Phys. Rev. A 84, 013609 (2011)]
Spin imbalance effect on the Larkin-Ovchinnikov-Fulde-Ferrel state
Ryosuke Yoshii, Shunji Tsuchiya, Giacomo Marmorini, and Muneto Nitta
Phys. Rev. B 84, 024503 (2011)
Superfluid/ferromagnet/superfluid-junction and \(\pi\)-phase in a superfluid Fermi gas at finite temperatures
T. Kashimura, S. Tsuchiya, and Y. Ohashi
Inhomogeneous Pseudogap Phenomenon in the BCS-BEC Crossover Regime of a Trapped Superfluid Fermi Gas
R. Watanabe, S. Tsuchiya, and Y. Ohashi
Theory of Photoemission-type Experiment in the BCS-BEC Crossover Regime of a Superfluid Fermi Gas
R. Watanabe, S. Tsuchiya, and Y. Ohashi
Statistical Difference in the Normal Phase of the Dipolar Ultracold Gases at Finite Temperatures
Yuki Endo, Takahiko Miyakawa and Tetsuro Nikuni
J. Phys. Soc. Jpn. 80, 044006 (2011)
Kinetic Theory of a Spin-1 Bose Condensed Gas at Finite Temperatures
Yuki Endo and Tetsuro Nikuni
J. Low Temp. Phys. 163, 92 (2011)
Accurate numerical verification of the instanton method for macroscopic quantum tunneling: dynamics of phase slips
I. Danshita and A. Polkovnikov
Physical Review B 82, 094304 (2010).
Critical velocity of flowing supersolids of dipolar Bose gases in optical lattices
I. Danshita and D. Yamamoto
Physical Review A 82, 013645 (2010).
Instability of superfluid Fermi gases induced by a roton-like density mode in optical lattices Superfluid density of states and pseudogap phenomenon in the BCS-BEC crossover regime of a superfluid Fermi gas
R. Watanabe, S. Tsuchiya, and Y. Ohashi
Physical Review A 82, 043630 (2010)
(selected for the November 2010 issue of Virtual Journal of Atomic Quantum Fluids).
Superfluid-ferromagnet-superfluid junction and the \(\pi\) phase in a superfluid Fermi gas
T. Kashimura, S. Tsuchiya, and Y. Ohashi
Physical Review A 82, 033617 (2010)
Photoemission spectrum and effect of inhomogeneous pairing fluctuations in the BCS-BEC crossover regime of an ultracold Fermi gas
S. Tsuchiya, R. Watanabe, and Y. Ohashi
Physical Review A 82, 033629 (2010)
(selected for the October 2010 issue of Virtual Journal of Atomic Quantum Fluids).
Equilibrium Properties of a Trapped Dipolar Fermion at Finite Temperatures
Yuki Endo, Takahiko Miyakawa and Tetsuro Nikuni
Population Dynamics of a Spin-1 Bose Gas at Finite Temperatures
Y. Endo and T. Nikuni
J. Low Temp. Phys. 158, 16 (2010)
Quantum Dynamics of Atom-molecule BECs in a Double-Well Potential
A. Motohashi and T. Nikuni
J. Low Temp. Phys. 158, 72 (2010)
Pseudogap behaviors of atomic Fermi gases above \(T_c\) in the BCS-BEC crossover
S. Tsuchiya, R. Watanabe, and Y. Ohashi
Physica C 470, S986- S988 (2010).
Pairing fluctuations and pseudogap effects in the BCS-BEC crossover regime of a superfluid Fermi gas
R. Watanabe, S. Tsuchiya, and Y. Ohashi
Physica C, 470 S980-S981 (2010).
ボース凝縮体におけるBogoliubovモードの異常トンネル効果
土屋俊二
Phase Separation in Bose-Bose Mixtures in an Optical Lattice
Takeshi Ozaki and Tetsuro Nikuni
Jounal of Physics Society of Japan 81 024001 (2012)
Instability of superfluid Fermi gases induced by a roton-like density mode in optical lattices
Y. Yunomae, D. Yamamoto, I. Danshita, N. Yokoshi, and S. Tsuchiya
Physical Review A 80, 063627 (2009).
Stability of superfluid Fermi gases in optical lattices
Y. Yunomae, D. Yamamoto, I. Danshita, N. Yokoshi, and S. Tsuchiya
Current-induced instability of superfluid Fermi gases in optical lattices
Y. Yunomae, I. Danshita, D. Yamamoto, N. Yokoshi, and S. Tsuchiya
Journal of Physics: Conference Series 150, 032128 (2009).
Quantum many-body dynamics of dark solitons in optical lattices
R. V. Mishmash, I. Danshita, C. W. Clark, and L. D. Carr
Physical Review A 80, 053612 (2009).
Counterflow and paired superfluidity in one-dimensional Bose mixtures in optical lattices
A. Hu, L. Mathey, I. Danshita, E. Tiesinga, C. J. Williams, and C. W. Clark
Physical Review A 80, 023619 (2009).
Bose-Hubbard ground state: extended Bogoliubov and variational methods compared with time-evolving block decimation
I. Danshita and P. Naidon
Physical Review A, 79, 043601 (2009).
Heavily damped motion of one-dimensional Bose gases in an optical lattice
I. Danshita and C. W. Clark
Physical Review Letters 102, 030407 (2009).
Creating a supersolid in one-dimensional Bose mixtures
L. Mathey, I. Danshita, and C. W. Clark
Physical Review A 79, 011602(R) (2009).
Particle-Localized Ground State of Atom-Molecule Bose-Einstein Condensates in a Double-Well Potential
Atsushi Motohashi, and Tetsuro Nikuni
Propagation of Second sound in a superfluid Fermi gas in the unitary limit
E. Arahata and T. Nikuni
Phys. Rev. A 80, 043613 (2009)
Critical Velocity in a Bose Gas in a Moving Optical Lattice at Finite Temperatures
E. Arahata and T. Nikuni
Phys. Rev. A 79, 063606 (2009)
Population Dynamics of a Spin-1 Bose Gas Above the Bose-Einstein Transition Temperature
Y. Endo and T. Nikuni
J. Phys. Soc. Jpn. 78, 094005 (2009)
Matter-wave dark solitons in a double-well potential
R. Ichihara, I. Danshita, and T. Nikuni
Phys. Rev. A 78, 063604 (2008)
Adiabatic Loading of Cold Bosons in Three-Dimensional Optical Lattices and Superfluid-Normal Phase Transition
S. Yoshimura, S. Konabe, and T. Nikuni
Phys. Rev. A 78, 015602 (2008)
Spin dynamics of a trapped spin-1 Bose Gas above the Bose-Einstein transition temperature
Y. Endo and T. Nikuni
J. Low Temp. Phys. 152, 21 (2008)
Damping of Condensate Oscillation of a Trapped Bose Gas in a One-Dimensional Optical Lattice at Finite Temperatures
E. Arahata and T. Nikuni
Phys. Rev. A 77, 033610 (2008)
Conversion Efficiencies of Heteronuclear Feshbach Molecules
S. Watabe and T. Nikuni
Coarse-Grained Finite-Temperature Theory for the Condensate in Optical Lattices
S. Konabe and T. Nikuni
J. Low Temp. Phys. 150, 12 (2008)
Vortex Lattice Structures of a Bose-Einstein Condensate in a Rotating Triangular Lattice Potential
T. Sato, T. Ishiyama, and T. Nikuni
Phys. Rev. A 76, 053628 (2007)
Adiabatic Phase Diagram of an Ultracold Atomic Fermi Gas with a Feshbach Resonance
S. Watabe, T. Nikuni, N. Nygaard, J. E. Williams, and C. W. Clark
Bose-Condensed Gases in a 1D Optical Lattice at Finite Temperatures
E. Arahata and T. Nikuni
J. Low Temp. Phys. 148, 345 (2007)
Hydrodynamics of superfluid Bose gases in an optical lattice at finite temperatures
Satoru Konabe and Tetsuro Nikuni
J. Low Temp. Phys. 148, 453 (2007)
Adiabatic Phase Diagram of a Degenerate Fermi Gas with a Feshbach Resonance
S. Watabe, T. Nikuni, N. Nygaard, J. E. Williams and C. W. Clark
J. Low Temp. Phys. 148, 435 (2007)
Instability of a superfluid Bose gas induced by a locked thermal gas in an optical lattice
S. Konabe and T. Nikuni
Laser probing of single-particle energy gap of a Bose gas in an optical lattice in the Mott insulator phase
S. Konabe, T. Nikuni, and M. Nakamura
Physical Review A 73, 033621 (2006)
Landau damping: Instability mechanism of superfluid Bose gases in optical lattices
K. Iigaya, S. Konabe, I. Danshita, and T. Nikuni