Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Bannasch, G."'
We propose and analyze a new scheme to produce ultracold neutral plasmas deep in the strongly coupled regime. The method exploits the interaction blockade between cold atoms excited to high-lying Rydberg states and therefore does not require substant
Externí odkaz:
http://arxiv.org/abs/1302.6108
Publikováno v:
Phys. Rev. Lett., 109, 185008 (2012)
Collisional relaxation of Coulomb systems is studied in the strongly coupled regime. We use an optical pump-probe approach to manipulate and monitor the dynamics of ions in an ultracold neutral plasma, which allows direct measurement of relaxation ra
Externí odkaz:
http://arxiv.org/abs/1302.6100
Publikováno v:
AIP Conf. Proc. 1421, 31 (2012)
We present techniques to perturb, measure and model the ion velocity distribution in an ultracold neutral plasma produced by photoionization of strontium atoms. By optical pumping with circularly polarized light we promote ions with certain velocitie
Externí odkaz:
http://arxiv.org/abs/1112.3241
Autor:
Bannasch, G., Pohl, T.
Publikováno v:
Phys. Rev. A 84, 052710 (2011)
In plasmas at very low temperatures formation of neutral atoms is dominated by collisional three-body recombination, owing to the strong ~ T^(-9/2) scaling of the corresponding recombination rate with the electron temperature T. While this law is wel
Externí odkaz:
http://arxiv.org/abs/1109.6456
Autor:
Bannasch, G., Selke, W.
Publikováno v:
J. Phys.: Conf. Ser. 200, 022057 (2010)
We study classical Heisenberg antiferromagnets with uniaxial exchange anisotropy and a cubic anisotropy term on simple cubic lattices in an external magnetic field using ground state considerations and extensive Monte Carlo simulations. In addition t
Externí odkaz:
http://arxiv.org/abs/0907.4173
Publikováno v:
Condensed Matter Physics 12, 547 (2009)
We study classical and quantum Heisenberg antiferromagnets with exchange anisotropy of XXZ-type and crystal field single-ion terms of quadratic and cubic form in a field. The magnets display a variety of phases, including the spin-flop (or, in the qu
Externí odkaz:
http://arxiv.org/abs/0907.1076
Autor:
Bannasch, G., Selke, W.
Classical Heisenberg antiferromagnets with uniaxial exchange anisotropy and a cubic anisotropy term in a field on simple cubic lattices are studied with the help of ground state considerations and extensive Monte Carlo simulations. Especially, we ana
Externí odkaz:
http://arxiv.org/abs/0807.1019
Uniaxially anisotropic antiferromagnets in a field along the easy axis are studied with the help of ground state considerations and Monte Carlo simulations. For classical models, the XXZ model as well as variants, we analyze the role of non-collinear
Externí odkaz:
http://arxiv.org/abs/0803.0067
Autor:
Bannasch, G.1, Selke, W.1 selke@physik.rwth-aachen.de
Publikováno v:
European Physical Journal B: Condensed Matter. Jun2009, Vol. 69 Issue 3, p439-444. 6p. 2 Diagrams, 6 Graphs.
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