Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR1.2k papers
- The University of TokyoJP948 papers
- Excellence Cluster UniverseDE902 papers
- University of BonnDE857 papers
- Max Planck Institute for PhysicsDE848 papers
- Ludwig-Maximilians-Universität MünchenDE836 papers
- Lawrence Berkeley National LaboratoryUS774 papers
- University of CopenhagenDK774 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR757 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR745 papers
- European Organization for Nuclear ResearchCH705 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TorinoIT682 papers
29 papers · 2 filters
Computations in Quantum Tensor Networks
T. Huckle, K. Waldherr, T. Schulte-Herbrueggen
The computation of the ground state (i.e. the eigenvector related to the smallest eigenvalue) is an important task in the simulation of quantum many-body systems. As the dimension…
Nonclassical Radiation from Thermal Cavities in the Ultrastrong Coupling Regime
Alessandro Ridolfo, Salvatore Savasta, Michael J. Hartmann
Thermal or chaotic light sources emit radiation characterized by a slightly enhanced probability of emitting photons in bunches, described by a zero-delay second-order correlation…
Two-photon spectra of quantum emitters
A. Gonzalez-Tudela, F. P. Laussy, C. Tejedor +2
We apply our recently developed theory of frequency-filtered and time-resolved N-photon correlations to study the two-photon spectra of a variety of systems of increasing complexit…
A "Single-Photon" Transistor in Circuit Quantum Electrodynamics
Lukas Neumeier, Martin Leib, Michael J. Hartmann
We introduce a circuit quantum electrodynamical setup for a "single-photon" transistor. In our approach photons propagate in two open transmission lines that are coupled via two in…
Quantum Information Processing with Nanomechanical Qubits
Simon Rips, Michael J. Hartmann
We introduce an approach to quantum information processing where the information is stored in the motional degrees of freedom of nanomechanical devices. The qubits of our approach…
A Dynamic Systems Approach to Fermions and Their Relation to Spins
Zoltán Zimborás, Robert Zeier, Michael Keyl +1
Dynamic properties of fermionic systems, like contollability, reachability, and simulability, are investigated in a general Lie-theoretical frame for quantum systems theory. Observ…
A Multi-path Interferometer with Ultracold Atoms Trapped in an Optical Lattice
J. Chwedenczuk, F. Piazza, A. Smerzi
We study an ultra-cold gas of bosons trapped in a one dimensional -site optical lattice perturbed by a spatially dependent potential , where the unknown coupling…
Thermal emission in the ultrastrong coupling regime
A. Ridolfo, M. Leib, S. Savasta +1
We study thermal emission of a cavity quantum electrodynamic system in the ultrastrong-coupling regime where the atom-cavity coupling rate becomes comparable the cavity resonance f…
Frustration free gapless Hamiltonians for Matrix Product States
Carlos Fernández-González, Norbert Schuch, Michael M. Wolf +2
For every Matrix Product State (MPS) one can always construct a so-called parent Hamiltonian. This is a local, frustration free, Hamiltonian which has the MPS as ground state and i…
Low temperature investigations of single silicon vacancy colour centres in diamond
Elke Neu, Christian Hepp, Michael Hauschild +6
We study single silicon vacancy (SiV) centres in chemical vapour deposition (CVD) nanodiamonds on iridium as well as an ensemble of SiV centres in a high quality, low stress CVD di…
Spontaneous Conversion from Virtual to Real Photons in the Ultrastrong Coupling Regime
R. Stassi, A. Ridolfo, O. Di Stefano +2
We show that a spontaneous release of virtual photon pairs can occur in a quantum optical system in the ultrastrong coupling regime. In this regime, which is attracting interest bo…
Arbitrarily varying and compound classical-quantum channels and a note on quantum zero-error capacities
Igor Bjelaković, Holger Boche, Gisbert Janßen +1
We consider compound as well as arbitrarily varying classical-quantum channel models. For classical-quantum compound channels, we give an elementary proof of the direct part of the…
Standard super-activation for Gaussian channels requires squeezing
Daniel Lercher, Géza Giedke, Michael M. Wolf
The quantum capacity of bosonic Gaussian quantum channels can be non-additive in a particularly striking way: a pair of such optical-fiber type channels can individually have zero…
Entanglement, fractional magnetization and long-range interactions
Andrea Cadarso, Mikel Sanz, Michael M. Wolf +2
Based on the theory of Matrix Product States, we give precise statements and complete analytical proofs of the following claim: a large fractionalization in the magnetization or th…
Strongly Incompatible Quantum Devices
Teiko Heinosaari, Takayuki Miyadera, Daniel Reitzner
The fact that there are quantum observables without a simultaneous measurement is one of the fundamental characteristics of quantum mechanics. In this work we expand the concept of…
Tensor Network Methods for Invariant Theory
Jacob Biamonte, Ville Bergholm, Marco Lanzagorta
Invariant theory is concerned with functions that do not change under the action of a given group. Here we communicate an approach based on tensor networks to represent polynomial…
Geometric optimal control of the contrast imaging problem in Nuclear Magnetic Resonance
B. Bonnard, O. Cots, S. J. Glaser +3
The objective of this article is to introduce the tools to analyze the contrast imaging problem in Nuclear Magnetic Resonance. Optimal trajectories can be selected among extremal s…
Many Body Physics with Coupled Transmission Line Resonators
Martin Leib, Michael J. Hartmann
We present the Josephson junction intersected superconducting transmission line resonator. In contrast to the Josephson parametric amplifier, Josephson bifurcation amplifier and Jo…
Quantum Walks
Daniel Reitzner, Daniel Nagaj, Vladimir Buzek
This tutorial article showcases the many varieties and uses of quantum walks. Discrete time quantum walks are introduced as counterparts of classical random walks. The emphasis is…
High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids
Hans Huebl, Christoph Zollitsch, Johannes Lotze +5
We report the observation of strong coupling between the exchange-coupled spins in gallium-doped yttrium iron garnet and a superconducting coplanar microwave resonator made from Nb…
Dissipative spin chains: Implementation with cold atoms and steady-state properties
Heike Schwager, J. Ignacio Cirac, Géza Giedke
We propose a quantum optical implementation of a class of dissipative spin systems, including the XXZ and Ising model, with ultra-cold atoms in optical lattices. Employing the moti…
Dissipative Dynamics and Phase Transitions in Fermionic Systems
Birger Horstmann, J. Ignacio Cirac, Géza Giedke
We study abrupt changes in the dynamics and/or steady state of fermionic dissipative systems produced by small changes of the system parameters. Specifically, we consider open ferm…
A decoupling approach to classical data transmission over quantum channels
Frédéric Dupuis, Oleg Szehr, Marco Tomamichel
Most coding theorems in quantum Shannon theory can be proven using the decoupling technique: to send data through a channel, one guarantees that the environment gets no information…
Photon Blockade in the Ultrastrong Coupling Regime
Alessandro Ridolfo, Martin Leib, Salvatore Savasta +1
We explore photon coincidence counting statistics in the ultrastrong-coupling regime where the atom-cavity coupling rate becomes comparable to the cavity resonance frequency. In th…