97 citations · 439 across the 20 of their papers we have counts for
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Quantum-echo Markov process for combinatorial optimization
Tatsuhiko Shirai
We introduce a quantum-echo Markov process for combinatorial optimization. Quantum dynamics based on quantum annealing (QA) or the quantum approximate optimization algorithm (QAOA)…
Compressed space quantum approximate optimization algorithm for constrained combinatorial optimization
Tatsuhiko Shirai, Nozomu Togawa
Combinatorial optimization is a promising area for achieving quantum speedup. Quantum approximate optimization algorithm (QAOA) is designed to search for low-energy states of the I…
Post-processing variationally scheduled quantum algorithm for constrained combinatorial optimization problems
Tatsuhiko Shirai, Nozomu Togawa
We propose a post-processing variationally scheduled quantum algorithm (pVSQA) for solving constrained combinatorial optimization problems (COPs). COPs are typically transformed in…
Exact bounds for dynamical critical exponents of transverse-field Ising chains with a correlated disorder
Tatsuhiko Shirai, Shu Tanaka
This study investigates the dynamical critical exponent of disordered Ising chains under transverse fields to examine the effect of a correlated disorder on quantum phase transitio…
Novel symmetry-broken phase in a driven cavity system in the thermodynamic limit
Tatsuhiko Shirai, Takashi Mori, Seiji Miyashita
We study non-equilibrium stationary states of a cavity system consisting of many atoms interacting with a quantized cavity field mode, under a driving field in a dissipative enviro…