Shiro Tamiya

TL;DR: In this article , a stochastic gradient line Bayesian optimization (SGLBO) algorithm is proposed to reduce the measurement-shot cost by estimating an appropriate direction of updating circuit parameters based on SGD and further utilizing bayesian optimization to estimate the optimal step size for each iteration in SGD.

TL;DR: In this article, an extension of the variational quantum eigensolver (VQE) is proposed to calculate the nonadiabatic couplings of molecules in quantum chemical systems and Berry's phase in quantum many-body systems.

TL;DR: In this article, the nonadiabatic couplings of molecules and Berry's phase of quantum systems were calculated by using the result of the variational quantum eigensolvers.

TL;DR: A long-standing open problem in quantum information is solved: Exact unitary t-designs with any strength can be generated using quantum circuits as discussed by the authors, which is the state-of-the-art result.