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
22 papers · 2 filters
Sequential Generation of Matrix-Product States in Cavity QED
C. Schoen, K. Hammerer, M. M. Wolf +2
We study the sequential generation of entangled photonic and atomic multi-qubit states in the realm of cavity QED. We extend the work of C. Schoen et al. [Phys. Rev. Lett. 95, 1105…
Optimal control of a qubit coupled to a non-Markovian environment
P. Rebentrost, I. Serban, T. Schulte-Herbrueggen +1
A central challenge for implementing quantum computing in the solid state is decoupling the qubits from the intrinsic noise of the material. We investigate the implementation of qu…
Introduction to decoherence theory
Klaus Hornberger
This is an introduction to the theory of decoherence with an emphasis on its microscopic origins and on a dynamic description. The text corresponds to a chapter soon to be publishe…
Monitoring approach to open quantum dynamics using scattering theory
Klaus Hornberger
It is shown how S-matrix theory and the concept of continuous quantum measurements can be combined to yield Markovian master equations which describe the environmental interaction…
Direct measurement of concurrence for atomic two-qubit pure states
G. Romero, C. E. Lopez, F. Lastra +2
We propose a general scheme to measure the concurrence of an arbitrary two-qubit pure state in atomic systems. The protocol is based on one- and two-qubit operations acting on two…
Experimental demonstration of four-party quantum secret sharing
S. Gaertner, C. Kurtsiefer, M. Bourennane +1
Secret sharing is a multiparty cryptographic task in which some secret information is splitted into several pieces which are distributed among the participants such that only an au…
Inductive Entanglement Classification of Four Qubits under SLOCC
L. Lamata, J. Leon, D. Salgado +1
Using an inductive approach to classify multipartite entangled states under stochastic local operations and classical communication introduced recently by the authors [Phys. Rev. A…
The Conway-Kochen argument and relativistic GRW models
A. Bassi, G. C. Ghirardi
In a recent paper, Conway and Kochen proposed what is now known as the "Free Will theorem" which, among other things, should prove the impossibility of combining GRW models with sp…
Effective Quantum Dynamics of Interacting Systems with Inhomogeneous Coupling
C. E. Lopez, H. Christ, J. C. Retamal +1
We study the quantum dynamics of a single mode/particle interacting inhomogeneously with a large number of particles and introduce an effective approach to find the accessible Hilb…
Photoionization Broadening of the 1S-2S Transition in a Beam of Atomic Hydrogen
N. Kolachevsky, M. Haas, U. D. Jentschura +7
We consider the excitation dynamics of the two-photon \sts transition in a beam of atomic hydrogen by 243 nm laser radiation. Specifically, we study the impact of ionization dampin…
Measuring the size of a Schroedinger cat state
Florian Marquardt, Benjamin Abel, Jan von Delft
We propose a measure for the "size" of a Schroedinger cat state, i.e. a quantum superposition of two many-body states with (supposedly) macroscopically distinct properties, by coun…
Remote preparation of an atomic quantum memory
Wenjamin Rosenfeld, Stefan Berner, Juergen Volz +2
Storage and distribution of quantum information are key elements of quantum information processing and quantum communication. Here, using atom-photon entanglement as the main physi…
Free-Space distribution of entanglement and single photons over 144 km
R. Ursin, F. Tiefenbacher, T. Schmitt-Manderbach +15
Quantum Entanglement is the essence of quantum physics and inspires fundamental questions about the principles of nature. Moreover it is also the basis for emerging technologies of…
Sequential Quantum Cloning
Y. Delgado, L. Lamata, J. Leon +2
Not all unitary operations upon a set of qubits can be implemented by sequential interactions between each qubit and an ancillary system. We analyze the specific case of sequential…
Master equation for a quantum particle in a gas
Klaus Hornberger
The equation for the quantum motion of a Brownian particle in a gaseous environment is derived by means of S-matrix theory. This quantum version of the linear Boltzmann equation ac…
Experimental Observation of Four-Photon Entangled Dicke State with High Fidelity
Nikolai Kiesel, Christian Schmid, Geza Toth +2
We present the experimental observation of the symmetric four-photon entangled Dicke state with two excitations . A simple experimental set-up allowed quantum state…
Quantum Information Processing in Optical Lattices and Magnetic Microtraps
Philipp Treutlein, Tilo Steinmetz, Yves Colombe +9
We review our experiments on quantum information processing with neutral atoms in optical lattices and magnetic microtraps. Atoms in an optical lattice in the Mott insulator regime…
Microwave potentials and optimal control for robust quantum gates on an atom chip
Philipp Treutlein, Theodor W. Hänsch, Jakob Reichel +3
We propose a two-qubit collisional phase gate that can be implemented with available atom chip technology, and present a detailed theoretical analysis of its performance. The gate…
Noise-Free Measurement of Harmonic Oscillators with Instantaneous Interactions
M. Franca Santos, G. Giedke, E. Solano
We present a method of measuring the quantum state of a harmonic oscillator through instantaneous probe-system selective interactions of the Jaynes-Cummings type. We prove that thi…
Thermal limitation of far-field matter-wave interference
Klaus Hornberger
We assess the effect of the heat radiation emitted by mesoscopic particles on their ability to show interference in a double slit arrangement. The analysis is based on a stationary…
Signatures of the Unruh effect from electrons accelerated by ultra-strong laser fields
Ralf Schützhold, Gernot Schaller, Dietrich Habs
We calculate the radiation resulting from the Unruh effect for strongly accelerated electrons and show that the photons are created in pairs whose polarizations are maximally entan…
Topological Factors Derived From Bohmian Mechanics
Detlef Duerr, Sheldon Goldstein, James Taylor +2
We derive for Bohmian mechanics topological factors for quantum systems with a multiply-connected configuration space Q. These include nonabelian factors corresponding to what we c…