320 citations
- Centre National de la Recherche ScientifiqueFR14 papers
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- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR7 papers
- Laboratoire de Physique ThéoriqueFR5 papers
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12 papers · 1 filter
Photon-Echo Quantum Memory
W. Tittel, M. Afzelius, R. L. Cone +4
The future of long-distance quantum communication relies on the availability of quantum memory, i.e. devices that allow temporal storage of quantum information. We review research…
Testing spooky action at a distance
D. Salart, A. Baas, C. Branciard +2
In science, one observes correlations and invents theoretical models that describe them. In all sciences, besides quantum physics, all correlations are described by either of two m…
Testing the Hilbert space dimension
Nicolas Brunner, Stefano Pironio, Antonio Acin +3
Given a set of correlations originating from measurements on a quantum state of unknown Hilbert space dimension, what is the minimal dimension d necessary to describes such correla…
Reduced randomness in quantum cryptography with sequences of qubits encoded in the same basis
L. -P. Lamoureux, H. Bechmann-Pasquinucci, N. J. Cerf +2
We consider the cloning of sequences of qubits prepared in the states used in the BB84 or 6-state quantum cryptography protocol, and show that the single-qubit fidelity is unaffect…
Ground State Entanglement Energetics
M. Buttiker, A. N. Jordan
We consider the ground state of simple quantum systems coupled to an environment. In general the system is entangled with its environment. As a consequence, even at zero temperatur…
Secure Coherent-state Quantum Key Distribution Protocols with Efficient Reconciliation
G. Van Assche, S. Iblisdir, N. J. Cerf
We study the equivalence between a realistic quantum key distribution protocol using coherent states and homodyne detection and a formal entanglement purification protocol. Maximal…