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19932026
Showing 2009 · quant-phShow all

15 papers · 2 filters

quant-ph2009★ 40 cited

Multilevel Holstein-Primakoff approximation and its application to atomic spin squeezing and ensemble quantum memories

Z. Kurucz, K. Mølmer

We show that an ensemble of identical d-level atoms can be efficiently described by d-1 collective oscillator degrees of freedom in the vicinity of a product state with all atoms i…

quant-ph2009★ 10 cited

Simulating local measurements on a quantum many body system with stochastic matrix product states

Søren Gammelmark, Klaus Mølmer

We demonstrate how to simulate both discrete and continuous stochastic evolution of a quantum many body system subject to measurements using matrix product states. A particular, bu…

quant-ph2009★ 16 cited

Correcting errors in a quantum gate with pushed ions via optimal control

U. V. Poulsen, S. Sklarz, D. Tannor +1

We analyze in detail the so-called "pushing gate" for trapped ions, introducing a time dependent harmonic approximation for the external motion. We show how to extract the average…

quant-ph2009★ 16 cited

Conditions for Efimov Physics for Finite Range Potentials

M. Thøgersen, D. V. Fedorov, A. S. Jensen +2

We consider a system of three identical bosons near a Feshbach resonance in the universal regime with large scattering length usually described by model independent zero-range pote…

quant-ph2009★ 20 cited

Large ion Coulomb crystals: a near-ideal medium for coupling optical cavity modes to matter

A. Dantan, M. Albert, J. P. Marler +2

We present an investigation of the coherent coupling of various transverse field modes of an optical cavity to ion Coulomb crystals. The obtained experimental results, which includ…

quant-ph2009★ 52 cited

Weak measurements with a qubit meter

Shengjun Wu, Klaus Mølmer

We derive schemes to measure the so-called weak values of quantum system observables by coupling of the system to a qubit meter system. We highlight, in particular, the meaning of…