11 papers
Shapiro steps of superfluid Fermi gases in a ring trap across the BCS--BEC crossover
Hikaru Kuriki, Masaya Kunimi, Tetsuro Nikuni
We investigate the transport properties of a superfluid Fermi gas confined in a ring trap with a moving potential barrier across the Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstei…
Construction of asymptotic quantum many-body scar states in the SU() Hubbard model
Daiki Hashimoto, Masaya Kunimi, Tetsuro Nikuni
We construct asymptotic quantum many-body scars (AQMBS) in one-dimensional SU() Hubbard chains () by embedding the scar subspace into an auxiliary Hilbert subspace $\ma…
Quantum Error Mitigation Simulates General Non-Hermitian Dynamics
Hiroki Kuji, Suguru Endo, Tetsuro Nikuni +2
While non-Hermitian Hamiltonians enable exotic dynamical phenomena, implementing their nonunitary time evolution on near-term quantum devices remains challenging. We propose a hard…
Performance Comparison of QAOA Mixers for Ternary Portfolio Optimization
Shintaro Yamamura, Satoshi Watanabe, Masaya Kunimi +2
The Quantum Approximate Optimization Algorithm (QAOA) is a quantum algorithm proposed for Noisy Intermediate-Scale Quantum (NISQ) devices and is regarded as a promising approach to…
Variational quantum-neural hybrid imaginary time evolution
Hiroki Kuji, Tetsuro Nikuni, Yuta Shingu
Numerous methodologies have been proposed to implement imaginary time evolution (ITE) on quantum computers. Among these, variational ITE (VITE) methods for noisy intermediate-scale…
Proposal for realizing quantum-spin systems on a two-dimensional square lattice with Dzyaloshinskii-Moriya interaction by Floquet engineering using Rydberg atoms
Hiroki Kuji, Masaya Kunimi, Tetsuro Nikuni
We theoretically propose a method for implementing the Hamiltonian incorporating Heisenberg and Dzyaloshinskii-Moriya (DM) interactions within Rydberg atoms arranged in a two-dimen…