3 papers
cond-mat.dis-nn2002
Memory-effect in glasses at low temperatures
P. Nalbach
The dielectric constant of amorphous solids at low temperatures is governed by the dynamics of tunneling systems, small groups of atoms which tunnel between quasi equivalent potent…
cond-mat.stat-mech2001
Dephasing of entangled qubits
P. Nalbach
We investigate the influence of nearby two-level systems on the dynamics of a qubit. The intrinsic decoherence is given by a coupling of both the qubit and the two-level systems to…
cond-mat.dis-nn1998
Rotating wave approximation: systematic expansion and application to coupled spin pairs
B. Thimmel, P. Nalbach, O. Terzidis
We propose a new treatment of the dynamics of a periodically time-dependent Liouvillian by mapping it onto a time-independent problem and give a systematic expansion for its effect…