16 citations · 38 across the 8 of their papers we have counts for
8 papers
Time-Convolutionless Master Equation Applied to Adiabatic Elimination
Masaaki Tokieda, Angela Riva
In open quantum systems theory, reduced models are invaluable for conceptual understanding and computational efficiency. Adiabatic elimination is a useful model reduction method fo…
Moment expansion method for composite open quantum systems including a damped oscillator mode
Masaaki Tokieda
We consider a damped oscillator mode that is resonantly driven and is coupled to an arbitrary target system via the position quadrature operator. For such a composite open quantum…
Complete positivity violation of the reduced dynamics in higher-order quantum adiabatic elimination
Masaaki Tokieda, Cyril Elouard, Alain Sarlette +1
This paper discusses quantum adiabatic elimination, which is a model reduction technique for a composite Lindblad system consisting of a fast decaying sub-system coupled to another…
Complete Positivity Violation in Higher-order Quantum Adiabatic Elimination
Masaaki Tokieda, Cyril Elouard, Alain Sarlette +1
When a composite Lindblad system consists of weakly coupled sub-systems with fast and slow timescales, the description of slow dynamics can be simplified by discarding fast degrees…
Equivalence of dissipative and dissipationless dynamics of interacting quantum systems with its application to the unitary Fermi gas
Masaaki Tokieda, Shimpei Endo
We analytically study quantum dissipative dynamics described by the Caldirola-Kanai model with inter-particle interactions. We have found that the dissipative quantum dynamics of t…
Time-dependent approaches to open quantum systems
M. Tokieda, K. Hagino
Couplings of a system to other degrees of freedom (that is, environmental degrees of freedom) lead to energy dissipation when the number of environmental degrees of freedom is larg…
A new approach for open quantum systems based on a phonon number representation of a harmonic oscillator bath
M. Tokieda, K. Hagino
To investigate a system coupled to a harmonic oscillator bath, we propose a new approach based on a phonon number representation of the bath. Compared to the method of the hierarch…
Quantum tunneling with friction
M. Tokieda, K. Hagino
Using the phenomenological quantum friction models introduced by Caldirola-Kanai, Kostin, and Albrecht, we study quantum tunneling of a one-dimensional potential in the presence of…