81 citations · 482 across the 29 of their papers we have counts for
10 papers · 1 filter
Error-Mitigated Quantum Metrology via Virtual Purification
Kaoru Yamamoto, Suguru Endo, Hideaki Hakoshima +2
Quantum metrology with entangled resources aims to achieve sensitivity beyond the standard quantum limit by harnessing quantum effects even in the presence of environmental noise.…
Emergence of Hilbert Space Fragmentation in Ising Models with a Weak Transverse Field
Atsuki Yoshinaga, Hideaki Hakoshima, Takashi Imoto +2
The transverse-field Ising model is one of the fundamental models in quantum many-body systems, yet a full understanding of its dynamics remains elusive in higher than one dimensio…
Calculation of Gibbs partition function with imaginary time evolution on near-term quantum computers
Keisuke Matsumoto, Yuta Shingu, Suguru Endo +5
The Gibbs partition function is an important quantity in describing statistical properties of a system in thermodynamic equilibrium. There are several proposals to calculate the pa…
Generalized quantum subspace expansion
Nobuyuki Yoshioka, Hideaki Hakoshima, Yuichiro Matsuzaki +3
One of the major challenges for erroneous quantum computers is undoubtedly the control over the effect of noise. Considering the rapid growth of available quantum resources that ar…
Variational secure cloud quantum computing
Yuta Shingu, Yuki Takeuchi, Suguru Endo +5
Variational quantum algorithms (VQAs) have been considered to be useful applications of noisy intermediate-scale quantum (NISQ) devices. Typically, in the VQAs, a parametrized ansa…
Quantum-Enhanced Heat Engine Based on Superabsorption
S. Kamimura, H. Hakoshima, Y. Matsuzaki +2
We propose a quantum-enhanced heat engine with entanglement. The key feature of our scheme is superabsorption, which facilitates enhanced energy absorption by entangled qubits. Whe…
Anonymous quantum sensing
Hiroto Kasai, Yuki Takeuchi, Hideaki Hakoshima +2
A lot of attention has been paid to a quantum-sensing network for detecting magnetic fields in different positions. Recently, cryptographic quantum metrology was investigated where…
Proposed rapid detection of nuclear spins with entanglement-enhanced sensors
Hideaki Hakoshima, Yuichiro Matsuzaki, Toyofumi Ishikawa
Recently, there have been significant developments to detect nuclear spins with an nitrogen vacancy (NV) center in diamond. However, due to the nature of the short range dipole-dip…
Quantum sensing to suppress systematic errors with measurements in the Zeno regime
Alisa Shimada, Hideaki Hakoshima, Suguru Endo +2
Quantum magnetic field sensing is an important technology for material science and biology. Although experimental imperfections affect the sensitivity, repetitions of the measureme…
Possibility of the total thermodynamic entropy production rate of a finite-sized isolated quantum system to be negative for the Gorini-Kossakowski-Sudarshan-Lindblad-type Markovian dynamics of its subsystem
Takaaki Aoki, Yuichiro Matsuzaki, Hideaki Hakoshima
We investigate a total thermodynamic entropy production rate of an isolated quantum system. In particular, we consider a quantum model of coupled harmonic oscillators in a star con…