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Dynamics, dephasing and clustering of impurity atoms in Bose-Einstein condensates
Alexander Klein, Martin Bruderer, Stephen R. Clark +1
We investigate the influence of a Bose-Einstein condensate (BEC) on the properties of immersed impurity atoms, which are trapped in an optical lattice. Assuming a weak coupling of…
A quantum repeater based on decoherence free subspaces
Uwe Dorner, Alexander Klein, Dieter Jaksch
We study a quantum repeater which is based on decoherence free quantum gates recently proposed by Klein et al. [Phys. Rev. A 73, 012332 (2006)]. A number of operations on the decoh…
Creating diamond color centers for quantum optical applications
F. C. Waldermann, P. Olivero, J. Nunn +10
Nitrogen vacancy (NV) centers in diamond have distinct promise as solid-state qubits. This is because of their large dipole moment, convenient level structure and very long room-te…
Efficient spatially-resolved multimode quantum memory
K. Surmacz, J. Nunn, F. C. Waldermann +4
We propose a method that enables efficient storage and retrieval of a photonic excitation stored in an ensemble quantum memory consisting of Lambda-type absorbers with non-zero Sto…
Dynamics of vortices in weakly interacting Bose-Einstein condensates
Alexander Klein, Dieter Jaksch, Yanzhi Zhang +1
We study the dynamics of vortices in ideal and weakly interacting Bose-Einstein condensates using a Ritz minimization method to solve the two-dimensional Gross-Pitaevskii equation.…
Transport of strong-coupling polarons in optical lattices
M. Bruderer, A. Klein, S. R. Clark +1
We study the transport of ultracold impurity atoms immersed in a Bose-Einstein condensate (BEC) and trapped in a tight optical lattice. Within the strong-coupling regime, we derive…