861 citations
- Max Planck SocietyDE115 papers
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- Technische Universität BraunschweigDE11 papers
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15 papers · 1 filter
Quantum resonances and decoherence for delta-kicked atoms
Sandro Wimberger, Italo Guarneri, Shmuel Fishman
The quantum resonances occurring with delta-kicked atoms when the kicking period is an integer multiple of the half-Talbot time are analyzed in detail. Exact results about the mome…
Quantum Phase Transition in the SU(4) Spin-Orbital Model on the Triangular Lattice
Karlo Penc, Matthieu Mambrini, Patrik Fazekas +1
Motivated by the absence of cooperative Jahn-Teller effect in LiNiO2 and BaVS3, two layered oxides with triangular planes, we study the SU(4) symmetric spin-orbital model on the tr…
Memory Effects in Long-Time Lindblad Motion
Klaus Dietz
It is shown that the Lindblad equation accounts for memory effects. That is to say, Lindblad operators can be constructed in a natural manner such that a memory term appears in the…
A New Method of the High Temperature Series Expansion
Noboru Fukushima
We formulate a new method of performing high-temperature series expansions for the spin-half Heisenberg model or, more generally, for SU() Heisenberg model with arbitrary . T…
Quantum Andreev map: A paradigm of quantum chaos in superconductivity
Ph. Jacquod, H. Schomerus, C. W. J. Beenakker
We introduce quantum maps with particle-hole conversion (Andreev reflection) and particle-hole symmetry, which exhibit the same excitation gap as quantum dots in the proximity to a…
Condensate fluctuations in the dilute Bose gas
Alexander Yu. Cherny
The fluctuations of a number of particles in the Bose-Einstein condensate are studied in the grand canonical ensemble with an effective single-mode Hamiltonian, which is derived fr…