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4 papers · 2 filters
Generalised Kronig-Penney model for ultracold atomic quantum systems
A. Negretti, R. Gerritsma, Z. Idziaszek +2
We study the properties of a quantum particle interacting with a one dimensional structure of equidistant scattering centres. We derive an analytical expression for the dispersion…
Quantum dynamics of an atomic double-well system interacting with a trapped ion
Jannis Joger, Antonio Negretti, Rene Gerritsma
We theoretically analyze the dynamics of an atomic double-well system with a single ion trapped in its center. We find that the atomic tunnelling rate between the wells depends bot…
Invariants of broken discrete symmetries
P. Kalozoumis, C. Morfonios, F. K. Diakonos +1
The parity and Bloch theorems are generalized to the case of broken global symmetry. Local inversion or translation symmetries are shown to yield invariant currents that characteri…
Interferometry with non-classical motional states of a Bose-Einstein condensate
Sandrine van Frank, Antonio Negretti, Tarik Berrada +6
We demonstrate a two-pulse Ramsey-type interferometer for non-classical motional states of a Bose-Einstein condensate in an anharmonic trap. The control pulses used to manipulate t…