5.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Ludwig-Maximilians-Universität MünchenDE568 papers
- Munich Center for Quantum Science and TechnologyDE404 papers
- Max Planck SocietyDE381 papers
- Centre National de la Recherche ScientifiqueFR143 papers
- Institute of Photonic SciencesES131 papers
- Technical University of MunichDE114 papers
- Universität InnsbruckAT107 papers
- ETH ZurichCH105 papers
- Harvard UniversityUS101 papers
- Austrian Academy of SciencesAT87 papers
- University of ViennaAT83 papers
- Institució Catalana de Recerca i Estudis AvançatsES75 papers
64 papers · 1 filter
Entanglement Percolation in Quantum Networks
Antonio Acin, J. Ignacio Cirac, Maciej Lewenstein
Quantum networks are composed of nodes which can send and receive quantum states by exchanging photons. Their goal is to facilitate quantum communication between any nodes, somethi…
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…
Design considerations for table-top, laser-based VUV and X-ray free electron lasers
F. Grüner, S. Becker, U. Schramm +12
A recent breakthrough in laser-plasma accelerators, based upon ultrashort high-intensity lasers, demonstrated the generation of quasi-monoenergetic GeV-electrons. With future Petaw…
Cooling of a micro-mechanical oscillator using radiation pressure induced dynamical back-action
A. Schliesser, P. Del'Haye, N. Nooshi +2
Cooling of a 58 MHz micro-mechanical resonator from room temperature to 11 K is demonstrated using cavity enhanced radiation pressure. Detuned pumping of an optical resonance allow…
A Mott-like State of Molecules
S. Dürr, T. Volz, N. Syassen +3
We prepare a quantum state where each site of an optical lattice is occupied by exactly one molecule. This is the same quantum state as in a Mott insulator of molecules in the limi…
Quantum emulsion: a glassy phase of bosonic mixtures in optical lattices
Tommaso Roscilde, J. Ignacio Cirac
We numerically investigate mixtures of two interacting bosonic species with unequal parameters in one-dimensional optical lattices. In large parameter regions full phase segregatio…
The disordered-free-moment phase: a low-field disordered state in spin-gap antiferromagnets with site dilution
Rong Yu, Tommaso Roscilde, Stephan Haas
Site dilution of spin-gapped antiferromagnets leads to localized free moments, which can order antiferromagnetically in two and higher dimensions. Here we show how a weak magnetic…
Variational study of hard-core bosons in a 2-D optical lattice using Projected Entangled Pair States (PEPS)
V. Murg, F. Verstraete, J. I. Cirac
We have studied the system of hard-core bosons on a 2-D optical lattice using a variational algorithm based on projected entangled-pair states (PEPS). We have investigated the grou…
Muonic hydrogen cascade time and lifetime of the short-lived state
L. Ludhova, F. D. Amaro, A. Antognini +24
Metastable muonic-hydrogen atoms undergo collisional -quenching, with rates which depend strongly on whether the kinetic energy is above or below the ${2S}\to {2P…
Delocalized Entanglement of Atoms in optical Lattices
K. G. H. Vollbrecht, J. I. Cirac
We show how to detect and quantify entanglement of atoms in optical lattices in terms of correlations functions of the momentum distribution. These distributions can be measured di…
Collisional decay of 87Rb Feshbach molecules at 1005.8 G
N. Syassen, T. Volz, S. Teichmann +2
We present measurements of the loss-rate coefficients K_am and K_mm caused by inelastic atom-molecule and molecule-molecule collisions. A thermal cloud of atomic 87Rb is prepared i…
A measurement-based measure of the size of macroscopic quantum superpositions
Jan Ivar Korsbakken, K. Birgitta Whaley, Jonathan DuBois +1
Recent experiments claiming formation of quantum superposition states in near macroscopic sys- tems raise the question of how the sizes of general quantum superposition states in a…
Quantum processing photonic states in optical lattices
Christine A. Muschik, Ines de Vega, Diego Porras +1
The mapping of photonic states to collective excitations of atomic ensembles is a powerful tool which finds a useful application in the realization of quantum memories and quantum…
The computational complexity of PEPS
Norbert Schuch, Michael M. Wolf, Frank Verstraete +1
We determine the computational power of preparing Projected Entangled Pair States (PEPS), as well as the complexity of classically simulating them, and generally the complexity of…
Modulational Instability in Nonlinearity-Managed Optical Media
Martin Centurion, Mason A. Porter, Ye Pu +3
We investigate analytically, numerically, and experimentally the modulational instability in a layered, cubically-nonlinear (Kerr) optical medium that consists of alternating layer…
Dividing Quantum Channels
Michael M. Wolf, J. Ignacio Cirac
We investigate the possibility of dividing quantum channels into concatenations of other channels, thereby studying the semigroup structure of the set of completely-positive trace-…
Quantum Description of Nuclear Spin Cooling in a Quantum Dot
H. Christ, J. I. Cirac, G. Giedke
We study theoretically the cooling of an ensemble of nuclear spins coupled to the spin of a localized electron in a quantum dot. We obtain a master equation for the state of the nu…
Polarization-controlled single photons
T. Wilk, S. C. Webster, H. P. Specht +2
Vacuum-stimulated Raman transitions are driven between two magnetic substates of a rubidium-87 atom strongly coupled to an optical cavity. A magnetic field lifts the degeneracy of…
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…
Time evolution algorithms for Matrix Product States and DMRG
Juan Jose Garcia-Ripoll
In this work we develop several new simulation algorithms for 1D many-body quantum mechanical systems combining the Matrix Product State variational ansatz with Taylor, Padé and Ar…
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…
High power spatial single-mode quantum cascade lasers at 8.9 m
Sebastien Forget, Clement Faugeras, Jean Yves Bengloan +5
High performance of InP-based quantum cascade lasers emitting at ~ 9m are reported. Thick electroplated gold layer was deposited on top of the laser to improve heat dissipat…
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…
Sum rules for an atomic hyperfine structure in a magnetic field
Savely G. Karshenboim
Sum rules for the energy levels of a hyperfine multiplet in a constant uniform magnetic field is presented. It is found that for any values of the electron angular moment and the n…