Low Temperature Physics: 39, 289 (2013); https://doi.org/10.1063/1.4795201 (5 pages)
Физика Низких Температур: Том 39, Выпуск 3 (Март 2013), c. 372-377    ( к оглавлению , назад )

Wigner function description of a qubit-oscillator system

James Allen and A.M. Zagoskin

Loughborough University, Loughborough, Leics LE11 3TU, UK
E-mail: A.Zagoskin@eboro.ac.uk

Received October 31, 2012


We derive the Bloch-type equations of motion for the Wigner function of a qubit nonlinearly coupled to a linear oscillator, and investigate their usefulness in the quantum-classical transition regime.

PACS: 03.67.–a Quantum information;
PACS: 03.67.Lx Quantum computation architectures and implementations;
PACS: 05.30.–d Quantum statistical mechanics.

Key words: qubit, oscillator, coherent state, Wigner function, Bloch equations, cat states, collapse and revival.