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12 papers · 2 filters
Storing quantum information using dark state polaritons
Mattias Johnsson, Klaus Moelmer
The possibility of using a solid medium to store few-photon laser pulses as coupled excitations between light and matter is investigated. The role of inhomogeneous broadening and n…
Quantum noise limited interferometric measurement of atomic noise: towards spin squeezing on the Cs clock transition
Daniel Oblak, Jens K. Mikkelsen, Wolfgang Tittel +5
We investigate theoretically and experimentally a nondestructive interferometric measurement of the state population of an ensemble of laser cooled and trapped atoms. This study is…
Light-Matter Quantum Interface
K. Hammerer, K. Molmer, E. S. Polzik +1
We propose a quantum interface which applies multiple passes of a pulse of light through an atomic sample with phase/polarization rotations in between the passes. Our proposal does…
On separability of quantum states and the violation of Bell-type inequalities
Elena R. Loubenets
In contrast to the wide-spread opinion that any separable quantum state satisfies every classical probabilistic constraint, we present a simple example where a separable quantum st…
Blind Quantum Computation
Pablo Arrighi, Louis Salvail
We investigate the possibility of "having someone carry out the work of executing a function for you, but without letting him learn anything about your input". Say Alice wants Bob…
"Local Realism", Bell's Theorem and Quantum "Locally Realistic" Inequalities
Elena R. Loubenets
Based on the new general framework for the probabilistic description of experiments, introduced in quant-ph/0305126, quant-ph/0312199, we analyze in mathematical terms the link bet…