3 papers
quant-ph2025
Quantum computation of a quasiparticle band structure with the quantum-selected configuration interaction
Takahiro Ohgoe, Hokuto Iwakiri, Kazuhide Ichikawa +2
Quasiparticle band structures are fundamental for understanding strongly correlated electron systems. While solving these structures accurately on classical computers is challengin…
quant-ph2025
Hardness of classically sampling quantum chemistry circuits
Ayoub Hafid, Hokuto Iwakiri, Kento Tsubouchi +2
Significant advances have been made in the study of quantum advantage both in theory and experiment, although these have mostly been limited to artificial setups. In this work, we…
quant-ph2024
Quantum expectation value estimation by doubling the number of qubits
Hiroshi Yano, Masaya Kohda, Shoichiro Tsutsui +4
Expectation value estimation is ubiquitous in quantum algorithms. The expectation value of a Hamiltonian, which is essential in various practical applications, is often estimated b…