Journal ArticleDOI
Experimental preparation and measurement of quantum states of motion of a trapped atom
Dietrich Leibfried,D. M. Meekhof,Christopher Monroe,B. E. King,W. M. Itano,David J. Wineland +5 more
TLDR
In this paper, the authors report the creation and full determination of several quantum states of motion of a 9Be+ ion bound in a RF (Paul) trap, which is coherently prepared from an ion which has been initially laser cooled to the zero-point of motion.Abstract:
We report the creation and full determination of several quantum states of motion of a 9Be+ ion bound in a RF (Paul) trap. The states are coherently prepared from an ion which has been initially laser cooled to the zero-point of motion. We create states having both classical and non-classical character including thermal, number, coherent, squeezed, and ‚Schrodinger cat‘ states. The motional quantum state is fully reconstructed using two novel schemes that determine the density matrix in the number state basis or the Wigner function. Our techniques allow well controlled experiments decoherence and related phenomena on the quantum-classical borderline.read more
Citations
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Journal ArticleDOI
Quantum dynamics of single trapped ions
TL;DR: Theoretical and experimental work on radio-frequency (Paul) traps is reviewed in this paper, with a focus on ions trapped in radiofrequency traps, which are ideal for quantum-optical and quantum-dynamical studies under well controlled conditions.
Journal ArticleDOI
Resolving photon number states in a superconducting circuit
David Schuster,Andrew Houck,J. A. Schreier,Andreas Wallraff,Andreas Wallraff,Jay M. Gambetta,Alexandre Blais,Alexandre Blais,Luigi Frunzio,Johannes Majer,Blake R. Johnson,Michel Devoret,S. M. Girvin,Robert Schoelkopf +13 more
TL;DR: A circuit QED experiment is reported in the strong dispersive limit, a new regime where a single photon has a large effect on the qubit without ever being absorbed, the basis of a logic bus for a quantum computer.
Generation of Non-classical Motional States of a Trapped Atom
TL;DR: In this article, the authors report the creation of thermal, Fock, coherent, and squeezed states of motion of a harmonically bound {sup 9}Be{sup +} ion.
Journal ArticleDOI
Quantum simulations with cold trapped ions
TL;DR: The control of internal and motional quantum degrees of freedom of laser-cooled trapped ions has been subject to intense theoretical and experimental research for about three decades as discussed by the authors, which may be employed to investigate physical models conceived to describe systems that are not directly accessible for experimental investigations.
Journal ArticleDOI
Microfabricated ion traps
TL;DR: In this paper, the authors provide an overview of material and electrical considerations for the design of micro-fabricated ion trap structures, and provide guidance in how to choose the appropriate fabrication design, consider dierent methods for the fabrication of micro fabricated ion traps and discuss previously realized structures.
References
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Journal ArticleDOI
Comparison of quantum and semiclassical radiation theories with application to the beam maser
E.T. Jaynes,F.W. Cummings +1 more
TL;DR: In this article, it was shown that the semiclassical theory, when extended to take into account both the effect of the field on the molecules and the effects of the molecules on the field, reproduces the same laws of energy exchange and coherence properties as the quantized field theory, even in the limit of one or a few quanta in the field mode.
Journal ArticleDOI
Quantum Computations with Cold Trapped Ions.
J. I. Cirac,Peter Zoller +1 more
TL;DR: A quantum computer can be implemented with cold ions confined in a linear trap and interacting with laser beams, where decoherence is negligible, and the measurement can be carried out with a high efficiency.
Journal ArticleDOI
Die gegenwärtige Situation in der Quantenmechanik
TL;DR: In this paper, the authors discuss the effect of the Verschrgnkung on the performance of the experimentators in terms of the results of the experiments they conducted, and present an analysis of the verifiability of their results.
Journal ArticleDOI
Decoherence and the transition from quantum to classical
TL;DR: In this paper, the authors argue that without quantum physics we could not explain the behavior of solids, the structure and function of DNA, the color of the stars, the action of lasers or the properties of superfluids.