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8 papers · 2 filters
Ancillary qubit spectroscopy of cavity (circuit) QED vacua
Jared Lolli, Alexandre Baksic, David Nagy +2
We investigate theoretically how the spectroscopy of an ancillary qubit can probe cavity (circuit) QED ground states containing photons. We consider three classes of systems (Dicke…
Off-axis retrieval of orbital angular momentum of light stored in cold atoms
R. A. de Oliveira, L. Pruvost, P. S. Barbosa +5
We report on the storage of orbital angu- lar momentum (OAM) of light of a Laguerre-Gaussian mode in an ensemble of cold cesium atoms and its re- trieval along an axis different fr…
POVM Quantization
Jean Pierre Gazeau, Barbara Heller
We present a general formalism for giving a measure space paired with a separable Hilbert space a quantum version based on normalized positive operator-valued measure. The latter a…
Absorption line shape recovery beyond the detection bandwidth limit: application to the precision spectroscopic measurement of the Boltzmann constant
François Rohart, Sinda Mejri, Papa Lat Tabara Sow +8
A theoretical model of the influence of detection bandwidth properties on observed line shapes in laser absorption spectroscopy is described. The model predicts artificial frequenc…
Finite temperature reservoir engineering and entanglement dynamics
S. Fedortchenko, A. Keller, T. Coudreau +1
We propose experimental methods to engineer reservoirs at arbitrary temperature which are feasible with current technology. Our results generalize to mixed states the possibility o…
An alternative representation for pure symmetric states of qubits and its applications to entanglement classification
A. Mandilara, T. Coudreau, A. Keller +1
We prove that the vast majority of symmetric states of qubits can be decomposed in a unique way into a superposition of spin 1/2 coherent states. For the case of two qubits, the pr…