Results 11 to 20 of about 101,744 (75)
Optimal geometry for efficient loading of an optical dipole trap [PDF]
, 2008 One important factor which determines efficiency of loading cold atoms into an optical dipole trap from a magneto-optical trap is the distance between the trap centers. By studying this efficiency for various optical trap depths (2--110 mK) we find that for optimum dipole trap loading, longitudinal displacements up to 15 mm are necessary.
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Nonadiabatic transitions in electrostatically trapped ammonia molecules [PDF]
Phys. Rev. A, 79, 051401 (2009), 2008 Nonadiabatic transitions are known to be major loss channels for atoms in magnetic traps, but have thus far not been experimentally reported upon for trapped molecules. We have observed and quantified losses due to nonadiabatic transitions for three isotopologues of ammonia in electrostatic traps, by comparing the trapping times in traps with a zero ...
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Canonical transformation for trapped/passing guiding-center orbits in axisymmetric tokamak geometry [PDF]
, 2014 The generating function for the canonical transformation from the parallel canonical coordinates $(p_{\|},s)$ to the action-angle coordinates $(J,\zeta)$ for trapped/passing guiding-center orbits in axisymmetric tokamak geometry is presented. Drawing on the analogy between the phase-space portraits of the librating/rotating pendulum and the trapped ...
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Local condensate depletion at trap center under strong interactions [PDF]
J. Phys. B 51 (2018) 085301, 2018 Cold trapped Bose-condensed atoms, interacting via hard-sphere repulsive potentials are considered. Simple mean-field approximations show that the condensate distribution inside a harmonic trap always has the shape of a hump with the maximum condensate density occurring at the trap center.
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Scaling of bipartite entanglement in one-dimensional lattice systems with a trapping potential [PDF]
J.Stat.Mech.2010:08020,2010, 2010 We study the effects of a power-law trapping potential on the scaling behaviour of the entanglement at the quantum critical point of one-dimensional (1D) lattice particle systems. We compute bipartite von Neumann and Renyi entropies in the presence of the trap, and analyze their scaling behaviour with increasing the trap size.
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Decoherence and fidelity in ion traps with fluctuating trap parameters [PDF]
, 1998 We consider two different kinds of fluctuations in an ion trap potential: external fluctuating electrical fields, which cause statistical movement (``wobbling'') of the ion relative to the center of the trap, and fluctuations of the spring constant, which are due to fluctuations of the ac-component of the potential applied in the Paul trap for ions. We
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Bose-Einstein Condensation in an electro-pneumatically transformed quadrupole-Ioffe magnetic trap [PDF]
, 2014 We report a novel approach for preparing a Bose-Einstein condensate (BEC) of $^{87}$Rb atoms using electro-pneumatically driven transfer of atoms into a Quadrupole-Ioffe magnetic trap (QUIC Trap). More than 5$\times$$10^{8}$ atoms from a Magneto-optical trap are loaded into a spherical quadrupole trap and then these atoms are transferred into an Ioffe ...
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Excitation of a moving oscillator [PDF]
arXiv, 2021 We calculate transition amplitudes and probabilities between the coherent and Fock states of a quantum harmonic oscillator with a moving center for an arbitrary law of motion. These quantities are determined by the Fourier transform of the moving center acceleration.
arxiv
Collection of indirect excitons in a diamond-shaped electrostatic trap [PDF]
Phys. Rev. Lett. 103, 087403 (2009), 2009 We report on the principle and realization of a new trap for excitons -- the diamond electrostatic trap -- which uses a single electrode to create a confining potential for excitons. We also create elevated diamond traps which permit evaporative cooling of the exciton gas.
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Charge and spin dynamics of interacting Fermions in a one dimensional harmonic trap [PDF]
Phys. Rev. Lett. 94, 176802 (2005), 2004 We study an atomic Fermi gas interacting through repulsive contact forces in a one dimensional harmonic trap. Bethe-Ansatz solutions lead to an inhomogeneous Tomonaga-Luttinger model for the low energy excitations. The equations of motion for charge and spin density waves are analyzed both near the trap center and near the trap edges.
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