Showing 2010 · quant-phShow all

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quant-ph2010★ 19 cited

Single spontaneous photon as a coherent beamsplitter for an atomic matterwave

Jiří Tomkovič, Michael Schreiber, Joachim Welte +3

In spontaneous emission an atom in an excited state undergoes a transition to the ground state and emits a single photon. Associated with the emission is a change of the atomic mom…

quant-ph2010★ 7 cited

On the Time-Dependent Analysis of Gamow Decay

Detlef Dürr, Robert Grummt, Martin Kolb

Gamow's explanation of the exponential decay law uses complex "eigenvalues" and exponentially growing "eigenfunctions". This raises the question, how Gamow's description fits into…

quant-ph2010★ 72 cited

Correlation complementarity yields Bell monogamy relations

P. Kurzynski, T. Paterek, R. Ramanathan +2

We present a method to derive Bell monogamy relations by connecting the complementarity principle with quantum non-locality. The resulting monogamy relations are stronger than thos…

quant-ph2010★ 6 cited

Laser Dressed Scattering of an Attosecond Electron Wave Packet

Justin Gagnon, Ferenc Krausz, Vladislav S. Yakovlev

We theoretically investigate the scattering of an attosecond electron wave packet launched by an attosecond pulse under the influence of an infrared laser field. As the electron sc…

quant-ph2010★ 37 cited

Highly-efficient state-selective sub-microsecond photoionization detection of single atoms

Florian Henkel, Michael Krug, Julian Hofmann +3

We experimentally demonstrate a detection scheme suitable for state analysis of single optically trapped atoms in less than 1 μs with an overall detection efficiency η exceeding 98…

quant-ph2010★ 63 cited

Inertial and gravitational mass in quantum mechanics

E. Kajari, N. L. Harshman, E. M. Rasel +3

We show that in complete agreement with classical mechanics, the dynamics of any quantum mechanical wave packet in a linear gravitational potential involves the gravitational and t…

quant-ph2010★ 594 cited

Fisher information and multiparticle entanglement

Philipp Hyllus, Wiesław Laskowski, Roland Krischek +5

The Fisher information gives a limit to the ultimate precision achievable in a phase estimation protocol. It has been shown recently that the Fisher information for a linear tw…

quant-ph2010★ 39 cited

Entanglement dynamics in open two-qubit systems via diffusive quantum trajectories

Carlos Viviescas, Ivonne Guevara, André R. R. Carvalho +2

We use quantum diffusive trajectories to prove that the time evolution of two-qubit entanglement under spontaneous emission can be fully characterized by optimal continuous monitor…

quant-ph2010★ 242 cited

Permutationally invariant quantum tomography

Geza Toth, Witlef Wieczorek, David Gross +3

We present a scalable method for the tomography of large multiqubit quantum registers. It acquires information about the permutationally invariant part of the density operator, whi…

quant-ph2010★ 36 cited

Non-classicality thresholds for multiqubit states - numerical analysis

Jacek Gruca, Wieslaw Laskowski, Marek Zukowski +4

States that strongly violate Bell's inequalities are required in many quantum informational protocols as, for example, in cryptography, secret sharing and the reduction of communic…

quant-ph2010★ 5 cited

Stochastic simulation algorithm for the quantum linear Boltzmann equation

Marc Busse, Piotr Pietrulewicz, Heinz-Peter Breuer +1

We develop a Monte Carlo wave function algorithm for the quantum linear Boltzmann equation, a Markovian master equation describing the quantum motion of a test particle interacting…

quant-ph2010★ 158 cited

Measuring nanomechanical motion with an imprecision far below the standard quantum limit

G. Anetsberger, E. Gavartin, O. Arcizet +5

We demonstrate a transducer of nanomechanical motion based on cavity enhanced optical near-fields capable of achieving a shot-noise limited imprecision more than 10 dB below the st…

quant-ph2010★ 881 cited

Atom chip based generation of entanglement for quantum metrology

Max F. Riedel, Pascal Böhi, Yun Li +3

Atom chips provide a versatile `quantum laboratory on a microchip' for experiments with ultracold atomic gases. They have been used in experiments on diverse topics such as low-dim…

quant-ph2010★ 139 cited

Resonant coupling of a Bose-Einstein condensate to a micromechanical oscillator

D. Hunger, S. Camerer, T. W. Haensch +4

We report experiments in which the vibrations of a micromechanical oscillator are coupled to the motion of Bose-condensed atoms in a trap. The interaction relies on surface forces…

quant-ph2010★ 487 cited

Quantum Memories. A Review based on the European Integrated Project "Qubit Applications (QAP)"

C. Simon, M. Afzelius, J. Appel +21

We perform a review of various approaches to the implementation of quantum memories, with an emphasis on activities within the quantum memory sub-project of the EU Integrated Proje…

quant-ph2010★ 13 cited

Molecular Feshbach dissociation as a source for motionally entangled atoms

Clemens Gneiting, Klaus Hornberger

We describe the dissociation of a diatomic Feshbach molecule due to a time-varying external magnetic field in a realistic trap and guide setting. An analytic expression for the asy…