139 citations · 709 across the 36 of their papers we have counts for
4 papers · 1 filter
Stationary states of two-level open quantum systems
Bartlomiej Gardas, Zbigniew Puchala
A problem of finding stationary states of open quantum systems is addressed. We focus our attention on a generic type of open system: a qubit coupled to its environment. We apply t…
Riccati equation and the problem of decoherence II: Symmetry and the solution of the Riccati equation
Bartlomiej Gardas
In this paper we revisit the problem of decoherence applying the block operator matrices analysis. Riccati algebraic equation associated with the Hamiltonian describing the process…
Exact reduced dynamics for a qubit in a precessing magnetic field and in the contact with a heat-bath
Bartlomiej Gardas
The two-level quantum system (qubit) in a precessing magnetic field and in contact with a heat bath is investigated. The exact reduced dynamics for the qubit in question is obtaine…
Riccati equation and the problem of decoherence
Bartłomiej Gardas
The block operator matrix theory is used to investigate the problem of a single qubit. We will establish a connection between the Riccati operator equation and the possibility of o…