Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Chinzei, Koki"'
Equivariant quantum neural networks (QNNs) are promising quantum machine learning models that exploit symmetries to provide potential quantum advantages. Despite theoretical developments in equivariant QNNs, their implementation on near-term quantum
Externí odkaz:
http://arxiv.org/abs/2410.01252
Quantum neural networks (QNNs) require an efficient training algorithm to achieve practical quantum advantages. A promising approach is the use of gradient-based optimization algorithms, where gradients are estimated through quantum measurements. How
Externí odkaz:
http://arxiv.org/abs/2406.18316
Publikováno v:
Phys. Rev. Research 6, 023042 (2024)
The quantum convolutional neural network (QCNN) is a promising quantum machine learning (QML) model that is expected to achieve quantum advantages in classically intractable problems. However, the QCNN requires a large number of measurements for data
Externí odkaz:
http://arxiv.org/abs/2306.07331
Autor:
Chinzei, Koki, Ikeda, Tatsuhiko N.
Publikováno v:
Phys. Rev. Research 4, 023025 (2022)
We consider a dissipative quantum Ising model periodically driven by a train of $\pi$-pulses and investigate dissipative discrete time crystals (DTCs) in solids. In this model, the interaction between the spins spontaneously breaks the discrete time
Externí odkaz:
http://arxiv.org/abs/2110.00591
Nonequilibrium steady states (NESSs) in periodically driven dissipative quantum systems are vital in Floquet engineering. We develop a general theory for high-frequency drives with Lindblad-type dissipation to characterize and analyze NESSs based on
Externí odkaz:
http://arxiv.org/abs/2107.07911
Autor:
Chinzei, Koki, Ikeda, Tatsuhiko N.
Publikováno v:
Phys. Rev. Lett. 125, 060601 (2020)
We investigate an unconventional symmetry in time-periodically driven systems, the Floquet dynamical symmetry (FDS). Unlike the usual symmetries, the FDS gives symmetry sectors that are equidistant in the Floquet spectrum and protects quantum coheren
Externí odkaz:
http://arxiv.org/abs/2003.13315
Autor:
Chinzei, Koki, Ikeda, Tatsuhiko N.
Publikováno v:
Phys. Rev. Research 2, 013033 (2020)
We consider noninteracting electrons coupled to laser fields, and study perturbatively the effects of the lattice potential involving disorder on the harmonic components of the electric current, which are sources of high-order harmonic generation (HH
Externí odkaz:
http://arxiv.org/abs/1905.05205
Publikováno v:
Phys. Rev. A 98, 063426 (2018)
By using the Floquet eigenstates, we derive a formula to calculate the high-harmonic components of the electric current (HHC) in the setup where a monochromatic laser field is turned on at some time. On the basis of this formulation, we study the HHC
Externí odkaz:
http://arxiv.org/abs/1807.02525