Zobrazeno 1 - 10
of 338
pro vyhledávání: '"Koschorreck, M."'
Autor:
Pertot, D., Sheikhan, A., Cocchi, E., Miller, L. A., Bohn, J. E., Koschorreck, M., Köhl, M., Kollath, C.
Publikováno v:
Phys. Rev. Lett. 113, 170403 (2014)
This paper comprises an experimental and theoretical investigation of the time evolution of a Fermi gas following fast and slow quenches of a one-dimensional optical double-well superlattice potential. We investigate both the local tunneling in the c
Externí odkaz:
http://arxiv.org/abs/1407.6037
Publikováno v:
Phys. Rev. Lett. 109, 130403 (2012)
We realize and study an attractively interacting two-dimensional Fermi liquid. Using momentum resolved photoemission spectroscopy, we measure the self-energy, determine the contact parameter of the short-range interaction potential, and find their de
Externí odkaz:
http://arxiv.org/abs/1206.5380
Publikováno v:
Phys. Rev. Lett. 108, 183602 (2012)
We study theoretically and experimentally the quantification of non-Gaussian distributions via non-destructive measurements. Using the theory of cumulants, their unbiased estimators, and the uncertainties of these estimators, we describe a quantifica
Externí odkaz:
http://arxiv.org/abs/1112.3814
Publikováno v:
Phys. Rev. Lett. 109, 253605 (2012)
We report the generation of spin squeezing and entanglement in a magnetically-sensitive atomic ensemble, and entanglement-enhanced field measurements with this system. A maximal Raman coherence is prepared in an ensemble of 8.5x10^5 laser-cooled Rb-8
Externí odkaz:
http://arxiv.org/abs/1111.6969
Publikováno v:
Nature 471, 486-489 (24 March 2011)
Quantum metrology studies the use of entanglement and other quantum resources to improve precision measurement. An interferometer using N independent particles to measure a parameter X can achieve at best the "standard quantum limit" (SQL) of sensiti
Externí odkaz:
http://arxiv.org/abs/1012.5787
Quantum non-demolition (QND) measurement of collective variables by off-resonant optical probing has the ability to create entanglement and squeezing in atomic ensembles. Until now, this technique has been applied to real or effective spin one-half s
Externí odkaz:
http://arxiv.org/abs/1005.2807
We measure the sensitivity of a broadband atomic magnetometer using quantum non-demolition spin measurements. A cold, dipole-trapped sample of rubidium atoms provides a long-lived spin system in a non-magnetic environment, and is probed non-destructi
Externí odkaz:
http://arxiv.org/abs/0911.4491
Autor:
Windpassinger, P. J., Kubasik, M., Koschorreck, M., Boisen, A., Kjaergaard, N., Polzik, E. S., Mueller, J. H.
We report on the performance of ultra low noise differential photodetectors especially designed for probing of atomic ensembles with weak light pulses. The working principle of the detectors is described together with the analysis procedures employed
Externí odkaz:
http://arxiv.org/abs/0903.3398
Autor:
Koschorreck, M., Mitchell, M. W.
We present a model which describes coherent and incoherent processes in continuous-variable atom-light interfaces. We assume Gaussian states for light and atoms and formulate the system dynamics in terms of first and second moments of the angular mom
Externí odkaz:
http://arxiv.org/abs/0802.0365
Hamiltonian Design in Atom-Light Interactions with Rubidium Ensembles: A Quantum Information Toolbox
Publikováno v:
Phys. Rev. A 77, 032316 (2008)
We study the coupling between collective variables of atomic spin and light polarization in an ensemble of cold 87Rb probed with polarized light. The effects of multiple hyperfine levels manifest themselves as a rank-2 tensor polarizability, whose ir
Externí odkaz:
http://arxiv.org/abs/0712.0256