117 citations · 779 across the 43 of their papers we have counts for
43 papers
Shortcuts to Adiabaticity in Krylov Space
Kazutaka Takahashi, Adolfo del Campo
Shortcuts to adiabaticity provide fast protocols for quantum state preparation in which the use of auxiliary counterdiabatic controls circumvents the requirement of slow driving in…
Dynamical invariant formalism of shortcuts to adiabaticity
Kazutaka Takahashi
We give a pedagogical introduction to dynamical invariant formalism of shortcuts to adiabaticity. For a given operator form of the Hamiltonian with undetermined coefficients, the d…
Generalized speed limits for classical stochastic systems and their applications to relaxation, annealing, and pumping processes
Kazutaka Takahashi, Yasuhiro Utsumi
We extend the speed limit of a distance between two states evolving by different generators for quantum systems [K. Suzuki and K. Takahashi, Phys. Rev. Res. 2, 032016(R) (2020)] to…
Counterdiabatic driving for periodically driven open quantum systems
Kazutaka Takahashi
We discuss dynamics of periodically-driven open quantum systems. The time evolution of the quantum state is described by the quantum master equation and the form of the dissipator…
Dynamical Lee-Yang zeros for continuous-time and discrete-time stochastic processes
Hiroki Yoshida, Kazutaka Takahashi
We describe classical stochastic processes by using dynamical Lee-Yang zeros. The system is in contact with external leads and the time evolution is described by the two-state clas…
Quantum lower and upper speed limits
Kazutaka Takahashi
We derive generalized quantum speed limit inequalities that represent limitations on the time evolution of quantum states. They are extensions of the original inequality and are ap…