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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.…
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…
Fundamental limits of quantum error mitigation
Ryuji Takagi, Suguru Endo, Shintaro Minagawa +1
The inevitable accumulation of errors in near-future quantum devices represents a key obstacle in delivering practical quantum advantages, motivating the development of various qua…
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…
Perturbative quantum simulation
Jinzhao Sun, Suguru Endo, Huiping Lin +3
Approximation based on perturbation theory is the foundation for most of the quantitative predictions of quantum mechanics, whether in quantum many-body physics, chemistry, quantum…
Quantum algorithm for calculation of transition amplitudes in hybrid tensor networks
Shu Kanno, Suguru Endo, Yasunari Suzuki +1
The hybrid tensor network approach allows us to perform calculations on systems larger than the scale of a quantum computer. However, when calculating transition amplitudes, there…
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…