Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Almog, Ido"'
Loading an ultra-cold ensemble into a static magnetic trap involves unavoidable loss of phase space density when the gravitational energy dominates the kinetic energy of the ensemble. In such a case the gravitational energy is transformed into heat,
Externí odkaz:
http://arxiv.org/abs/1802.08983
Publikováno v:
Phys. Rev. A 96, 032713 (2017)
The softness of elastic atomic collisions, defined as the average number of collisions each atom undergoes until its energy decorrelates significantly, can have a considerable effect on the decay dynamics of atomic coherence. In this paper we combine
Externí odkaz:
http://arxiv.org/abs/1706.09004
Publikováno v:
Phys. Rev. A 94, 042317 (2016)
An optimal dynamical decoupling of a quantum system coupled to a noisy environment must take into account also the imperfections of the control pulses. We present a new formalism which describes, in a closed-form expression, the evolution of the syst
Externí odkaz:
http://arxiv.org/abs/1303.2045
Publikováno v:
Phys. Rev. Lett. 111, 073001 (2013)
We propose a simple method to spectrally resolve single-spins in a cold atomic system, thus realizing single-spin addressing. This scheme uses a dressing field with a spatially-dependent coupling to the atoms. We realize this scheme experimentally us
Externí odkaz:
http://arxiv.org/abs/1210.7336
Publikováno v:
Phys. Rev. Lett. 108, 093002 (2012)
We experimentally study anomalous diffusion of ultra-cold atoms in a one dimensional polarization optical lattice. The atomic spatial distribution is recorded at different times and its dynamics and shape are analyzed. We find that the width of the c
Externí odkaz:
http://arxiv.org/abs/1109.1503
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 44, 154006 (2011)
Decoherence is a major obstacle to any practical implementation of quantum information processing. One of the leading strategies to reduce decoherence is dynamical decoupling --- the use of an external field to average out the effect of the environme
Externí odkaz:
http://arxiv.org/abs/1103.1104
Publikováno v:
Phys. Rev. A 83, 043821 (2011)
We show that the spectrum of an ensemble of two-level systems can be broadened through `resetting' discrete fluctuations, in contrast to the well-known motional-narrowing effect. We establish that the condition for the onset of motional broadening is
Externí odkaz:
http://arxiv.org/abs/1103.0413
Publikováno v:
Phys. Rev. Lett. 105, 053201 (2010)
Atomic ensembles have many potential applications in quantum information science. Owing to collective enhancement, working with ensembles at high densities increases the overall efficiency of quantum operations, but at the same time also increases th
Externí odkaz:
http://arxiv.org/abs/1004.1011
We employ a continuous dynamical decoupling scheme to suppress the decoherence induced by elastic collisions of cold atoms. Using a continuous echo pulse we achieve a thirty-fold increase in the coherence time of Rb87 atoms trapped in a dipole trap.
Externí odkaz:
http://arxiv.org/abs/0905.0286
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