4 papers
Saturable Quantum Speed Limits for Imaginary-Time Evolution
Kohei Kobayashi
We derive a Geometric quantum speed limit (QSL) for imaginary-time evolution, where the dynamics is governed by a non-unitary Schrödinger equation. By introducing a cost function…
Quantum speed limit under decoherence: unitary, dissipative, and fluctuation contributions
Kohei Kobayashi
We derive a new quantum speed limit (QSL) for open quantum systems governed by Markovian dynamics. By analyzing the time derivative of the Bures angle between the initial pure stat…
Norm Inequality for Perturbed Quantum Evolutions and Its Application to Grover's Algorithm
Kohei Kobayashi
We investigate the impact of coherent control errors on quantum state evolution by deriving a general norm inequality based on Gronwall's lemma. This inequality provides an explici…
Inequality for von Neumann entropy change under measurement and dissipation
Kohei Kobayashi
We derive a universal inequality that provides a lower bound on the ensemble-averaged von Neumann entropy change in a quantum system subject to continuous measurement and dissipati…