Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.9k papers
- University of MichiganUS2k papers
- Institute for High Energy PhysicsES1.9k papers
- University College LondonGB1.9k papers
- University of ManchesterGB1.9k papers
- University of BonnDE1.9k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.8k papers
- Brookhaven National LaboratoryUS1.8k papers
- University of ArizonaUS1.8k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.8k papers
- Max Planck Institute for PhysicsDE1.8k papers
- Aix-Marseille UniversitéFR1.8k papers
24 papers · 2 filters
Single-Atom Cavity QED and Opto-Micromechanics
M. Wallquist, K. Hammerer, P. Zoller +6
In a recent publication [K. Hammerer et al., Phys. Rev. Lett. 103, 063005 (2009)] we have shown the possibility to achieve strong coupling of the quantized motion of a micron-sized…
Entanglement of mechanical oscillators coupled to a non-equilibrium environment
Max Ludwig, K. Hammerer, Florian Marquardt
Recent experiments aim at cooling nanomechanical resonators to the ground state by coupling them to non-equilibrium environments in order to observe quantum effects such as entangl…
Efficient creation of multipartite entanglement in flux qubits
Johannes Ferber, Frank K. Wilhelm
We investigate three superconducting flux qubits coupled in a loop. In this setup, tripartite entanglement can be created in a natural, controllable, and stable way. Both generic k…
Optimal control of circuit quantum electrodynamics in one and two dimensions
R. Fisher, F. Helmer, S. J. Glaser +2
Optimal control can be used to significantly improve multi-qubit gates in quantum information processing hardware architectures based on superconducting circuit quantum electrodyna…
Pointer basis induced by collisional decoherence
Marc Busse, Klaus Hornberger
We study the emergence and dynamics of pointer states in the motion of a quantum test particle affected by collisional decoherence. These environmentally distinguished states are s…
The Uncertainty Principle in the Presence of Quantum Memory
Mario Berta, Matthias Christandl, Roger Colbeck +2
The uncertainty principle, originally formulated by Heisenberg, dramatically illustrates the difference between classical and quantum mechanics. The principle bounds the uncertaint…
On the Electromagnetic Properties of Matter in Collapse Models
Angelo Bassi, Detlef Duerr
We discuss the electromagnetic properties of both a charged free particle, and a charged particle bounded by an harmonic potential, within collapse models. By choosing a particular…
A Categorical Framework for Quantum Theory
Thomas Filk, Albrecht von Mueller
Underlying any theory of physics is a layer of conceptual frames. They connect the mathematical structures used in theoretical models with physical phenomena, but they also constit…
Relaxation of a qubit measured by a driven Duffing oscillator
I. Serban, M. I. Dykman, F. K. Wilhelm
We investigate the relaxation of a superconducting qubit for the case when its detector, the Josephson bifurcation amplifier, remains latched in one of its two (meta)stable states…
Entanglement and communication-reducing properties of noisy N-qubit states
Wieslaw Laskowski, Tomasz Paterek, Caslav Brukner +1
We consider properties of states of many qubits, which arise after sending certain entangled states via various noisy channels (white noise, coloured noise, local depolarization, d…
Emergence of pointer states in a non-perturbative environment
Marc Busse, Klaus Hornberger
We show that the pointer basis distinguished by collisional decoherence consists of exponentially localized, solitonic wave packets. Based on the orthogonal unraveling of the quant…
Entangling the free motion of a particle pair: an experimental scenario
Clemens Gneiting, Klaus Hornberger
The concept of dissociation-time entanglement provides a means of manifesting non-classical correlations in the motional state of two counter-propagating atoms. In this article, we…
Strong coupling of a mechanical oscillator and a single atom
K. Hammerer, M. Wallquist, C. Genes +6
We propose and analyze a setup to achieve strong coupling between a single trapped atom and a mechanical oscillator. The interaction between the motion of the atom and the mechanic…
Testing the Stability of the Fine Structure Constant in the Laboratory
N. Kolachevsky, A. Matveev, J. Alnis +6
In this review we discuss the progress of the past decade in testing for a possible temporal variation of the fine structure constant . Advances in atomic sample preparation, la…
Coherent manipulation of Bose-Einstein condensates with state-dependent microwave potentials on an atom chip
Pascal Boehi, Max F. Riedel, Johannes Hoffrogge +3
Entanglement-based technologies, such as quantum information processing, quantum simulations, and quantum-enhanced metrology, have the potential to revolutionise our way of computi…
Near-field cavity optomechanics with nanomechanical oscillators
G. Anetsberger, O. Arcizet, Q. P. Unterreithmeier +5
Cavity-enhanced radiation pressure coupling between optical and mechanical degrees of freedom allows quantum-limited position measurements and gives rise to dynamical backaction en…
Quantum linear Boltzmann equation
Bassano Vacchini, Klaus Hornberger
We review the quantum version of the linear Boltzmann equation, which describes in a non-perturbative fashion, by means of scattering theory, how the quantum motion of a single tes…
Theory and experimental verification of Kapitza-Dirac-Talbot-Lau interferometry
Klaus Hornberger, Stefan Gerlich, Hendrik Ulbricht +5
Kapitza-Dirac-Talbot-Lau interferometry (KDTLI) has recently been established for demonstrating the quantum wave nature of large molecules. A phase space treatment permits us to de…
Practical methods for witnessing genuine multi-qubit entanglement in the vicinity of symmetric states
Geza Toth, Witlef Wieczorek, Roland Krischek +3
We present general numerical methods to construct witness operators for entanglement detection and estimation of the fidelity. Our methods are applied to detecting entanglement in…
Experimental entanglement of a six-photon symmetric Dicke state
Witlef Wieczorek, Roland Krischek, Nikolai Kiesel +3
We report on the experimental observation and characterization of a six-photon entangled Dicke state. We obtain a fidelity as high as 0.6540.024 and prove genuine six-photon e…
Interference contrast in multi-source few photon optics
Wieslaw Laskowski, Marcin Wiesniak, Marek Zukowski +2
Many recent experiments employ several parametric down conversion (PDC) sources to get multiphoton interference. Such interference has applications in quantum information. We study…
Multi-qubit entanglement engineering via projective measurements
Witlef Wieczorek, Nikolai Kiesel, Christian Schmid +1
So far, various multi-photon entangled states have been observed experimentally by using different experimental set-ups. Here, we present a scheme to realize many SLOCC-inequivalen…
Non-classical correlations from dissociation time entanglement
Clemens Gneiting, Klaus Hornberger
We discuss a strongly entangled two-particle state of motion that emerges naturally from the double-pulse dissociation of a diatomic molecule. This state, which may be called disso…
Broadcast copies reveal the quantumness of correlations
M. Piani, M. Christandl, C. E. Mora +1
We study the quantumness of bipartite correlations by proposing a quantity that combines a measure of total correlations -- mutual information -- with the notion of broadcast copie…