88 research outputs found
Realization of a chip-based hybrid trapping setup for Rb atoms and Yb Ion crystals
Hybrid quantum systems integrate laser-cooled trapped ions and ultracold
quantum gases within a single experimental configuration, offering vast
potential for applications in quantum chemistry, polaron physics, quantum
information processing, and quantum simulations. In this study, we introduce
the development and experimental validation of an ion trap chip that
incorporates a flat atomic chip trap directly beneath it. This innovative
design addresses specific challenges associated with hybrid atom-ion traps by
providing precisely aligned and stable components, facilitating independent
adjustments of the depth of the atomic trapping potential and the positioning
of trapped ions. Our findings include successful loading of the ion trap with
linear Yb ion crystals and the loading of neutral Rb atoms into a
mirror magneto-optical trap (mMOT)Comment: arXiv admin note: text overlap with arXiv:2301.1086
Phonon-phonon interactions due to non-linear effects in a linear ion trap
We examine in detail the theory of the intrinsic non-linearities in the
dynamics of trapped ions due to the Coulomb interaction. In particular the
possibility of mode-mode coupling, which can be a source of decoherence in
trapped ion quantum computation, or, alternatively, can be exploited for
parametric down-conversion of phonons, is discussed and conditions under which
such coupling is possible are derived.Comment: 25 pages, 4 figure
Visibility of Young's interference fringes: Scattered light from small ion crystals
We observe interference in the light scattered from trapped Ca ion
crystals. By varying the intensity of the excitation laser, we study the
influence of elastic and inelastic scattering on the visibility of the fringe
pattern and discriminate its effect from that of the ion temperature and
wave-packet localization. In this way we determine the complex degree of
coherence and the mutual coherence of light fields produced by individual
atoms. We obtain interference fringes from crystals consisting of two, three
and four ions in a harmonic trap. Control of the trapping potential allows for
the adjustment of the interatomic distances and thus the formation of linear
arrays of atoms serving as a regular grating of microscopic scatterers.Comment: Main text: 5 pages, 4 figures. Supplemental Material: 2pages, 1
figur
Optimal Phonon-to-Spin Mapping in a system of a trapped ion
We propose a protocol for measurement of the phonon number distribution of a
harmonic oscillator based on selective mapping to a discrete spin-1/2 degree of
freedom. We consider a system of a harmonically trapped ion, where a transition
between two long lived states can be driven with resolved motional sidebands.
The required unitary transforms are generated by amplitude-modulated
polychromatic radiation fields, where the time-domain ramps are obtained from
numerical optimization by application of the Chopped RAndom Basis (CRAB)
algorithm. We provide a detailed analysis of the scaling behavior of the
attainable fidelities and required times for the mapping transform with respect
to the size of the Hilbert space. As one application we show how the mapping
can be employed as a building block for experiments which require measurement
of the work distribution of a quantum process
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