17 citations · 20 across the 4 of their papers we have counts for
5 papers · 1 filter
Quantum Algorithm, Gaussian Sums, and Topological Invariants
K. Shiokawa
Certain quantum topological invariants of three manifolds can be written in the form of the Gaussian sum. It is shown that such topological invariants can be approximated efficient…
Non-Markovian Dynamics and Entanglement in Quantum Brownian Motion
K. Shiokawa
Dynamical aspects of quantum Brownian motion in a low temperature environment are investigated. We give a systematic calculation of quantum entanglement among two Brownian oscillat…
Non-Markovian Quantum Error Deterrence by Dynamical Decoupling in a General Environment
K. Shiokawa, B. L. Hu
A dynamical decoupling scheme for the deterrence of errors in the non-Markovian (usually corresponding to low temperature, short time, and strong coupling) regimes suitable for qub…
Qubit Decoherence and Non-Markovian Dynamics at Low Temperatures via an Effective Spin-Boson Model
K. Shiokawa, B. L. Hu
Quantum Brownian oscillator model (QBM), in the Fock-space representation, can be viewed as a multi-level spin-boson model. At sufficiently low temperature, the oscillator degrees…
Dynamical Decoupling Using Slow Pulses: Efficient Suppression of 1/f Noise
K. Shiokawa, D. A. Lidar
The application of dynamical decoupling pulses to a single qubit interacting with a linear harmonic oscillator bath with spectral density is studied, and compared to the Ohmi…