10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Institute for High Energy PhysicsES2k papers
- Institució Catalana de Recerca i Estudis AvançatsES1.3k papers
- Centre National de la Recherche ScientifiqueFR1.2k papers
- University of PisaIT1.2k papers
- University College LondonGB1.1k papers
- Lawrence Berkeley National LaboratoryUS1.1k papers
- University of MichiganUS1.1k papers
- University of GenevaCH1.1k papers
- The Ohio State UniversityUS1.1k papers
- University of ChicagoUS1k papers
- Yale UniversityUS1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT1k papers
14 papers · 2 filters
Efficiency in Quantum Key Distribution Protocols with Entangled Gaussian States
C. Rodó, O. Romero-Isart, K. Eckert +1
Quantum key distribution (QKD) refers to specific quantum strategies which permit the secure distribution of a secret key between two parties that wish to communicate secretly. Qua…
The Quantum Chernoff Bound
K. M. R. Audenaert, J. Calsamiglia, Ll. Masanes +4
We consider the problem of discriminating two different quantum states in the setting of asymptotically many copies, and determine the optimal strategy that minimizes the total pro…
Two-photon and EIT-assisted Doppler cooling in a three-level cascade system
Giovanna Morigi, Ennio Arimondo
Laser cooling is theoretically investigated in a cascade three-level scheme, where the excited state of a laser-driven transition is coupled by a second laser to a top, more stable…
Quantum State Transfer in Spin-1 Chains
O. Romero-Isart, K. Eckert, A. Sanpera
We study the transfer of quantum information through a Heisenberg spin-1 chain prepared in its ground state. We measure the efficiency of such a quantum channel {\em via} the fidel…
Coexistence of unlimited bipartite and genuine multipartite entanglement: Promiscuous quantum correlations arising from discrete to continuous variable systems
Gerardo Adesso, Marie Ericsson, Fabrizio Illuminati
Quantum mechanics imposes 'monogamy' constraints on the sharing of entanglement. We show that, despite these limitations, entanglement can be fully 'promiscuous', i.e. simultaneous…
Quantum coherence and population trapping in three-photon processes
Caroline Champenois, Giovanna Morigi, Juergen Eschner
The spectroscopic properties of a single, tightly trapped atom are studied, when the electronic levels are coupled by three laser fields in an -shaped configuration of levels, w…
Trapped Ion Chain as a Neural Network: Error Resistant Quantum Computation
Marisa Pons, Veronica Ahufinger, Christof Wunderlich +5
We demonstrate the possibility of realizing a neural network in a chain of trapped ions with induced long range interactions. Such models permit one to store information distribute…
How to hide a secret direction
E. Bagan, J. Calsamiglia, R. Demkowicz-Dobrzanski +1
We present a procedure to share a secret spatial direction in the absence of a common reference frame using a multipartite quantum state. The procedure guarantees that the parties…
Full security of quantum key distribution from no-signaling constraints
Ll. Masanes, R. Renner, M. Christandl +2
We analyze a cryptographic protocol for generating a distributed secret key from correlations that violate a Bell inequality by a sufficient amount, and prove its security against…
Cavity-QED entangled photon source based on two truncated Rabi oscillations
R. Garcia-Maraver, K. Eckert, R. Corbalan +1
We discuss a cavity-QED scheme to deterministically generate entangled photons pairs by using a three-level atom successively coupled to two single longitudinal mode high-Q cavitie…
A single cold atom as efficient stationary source of EPR-entangled light
David Vitali, Giovanna Morigi, Jürgen Eschner
The Stokes and anti-Stokes components of the spectrum of resonance fluorescence of a single trapped atom, which originate from the mechanical coupling between the scattered photons…
Universal decoherence induced by an environmental quantum phase transition
Fernando Martin Cucchietti, Sonia Fernandez-Vidal, Juan Pablo Paz
Decoherence induced by coupling a system with an environment may display universal features. Here we demostrate that when the coupling to the system drives a quantum phase transiti…
Ground state cooling in a bad cavity
Stefano Zippilli, Giovanna Morigi, Wolfgang P. Schleich
We study the mechanical effects of light on an atom trapped in a harmonic potential when an atomic dipole transition is driven by a laser and it is strongly coupled to a mode of an…
A deterministic cavity-QED source of polarization entangled photon pairs
R. Garcia-Maraver, K. Eckert, R. Corbalan +1
We present two cavity quantum electrodynamics proposals that, sharing the same basic elements, allow for the deterministic generation of entangled photons pairs by means of a three…