- Centre National de la Recherche ScientifiqueFR640 papers
- The University of SydneyAU475 papers
- University of BirminghamGB381 papers
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- Instituto de Astrofísica de CanariasES341 papers
- Universidad de La LagunaES308 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR304 papers
- California Institute of TechnologyUS282 papers
- Center for Astrophysics Harvard & SmithsonianUS281 papers
- European Southern ObservatoryCL265 papers
- Astrophysique, Instrumentation et ModélisationFR259 papers
- Osservatorio Astronomico di PadovaIT258 papers
20 papers · 2 filters
A Practical Trojan Horse for Bell-inequality-based Quantum Cryptography
Jan-Åke Larsson
Quantum Cryptography, or more accurately, Quantum Key Distribution (QKD) is based on using an unconditionally secure ``quantum channel'' to share a secret key among two users. A ma…
Coherence and squeezing in superpositions of spin coherent states
Xiaoguang Wang
We consider the superpositions of spin coherent states and study the coherence properties and spin squeezing in these states. The spin squeezing is examined using a new version of…
Quantum stochastic approach to the description of quantum measurements
Elena R. Loubenets
In the present paper we consider the problem of description of an arbitrary generalized quantum measurement with outcomes in a measurable space. Analyzing the unitary invariants of…
Counterfactual Statements and Weak Measurements: an Experimental Proposal
Klaus Molmer
A recent analysis [quant-ph/0104062] suggests that weak measurements can be used to give observational meaning to counterfactual reasoning in quantum physics. A weak measurement is…
Experimental long-lived entanglement of two macroscopic objects
Brian Julsgaard, Alexander Kozhekin, Eugene S. Polzik
Entanglement is considered to be one of the most profound features of quantum mechanics. An entangled state of a system consisting of two subsystems cannot be described as a produc…
Pairwise entanglement in symmetric multi-qubit systems
Xiaoguang Wang, Klaus Molmer
The concurrence, a quantitative measure of the entanglement between a pair of particles, is determined for the case where the pair is extracted from a symmetric state of N two-leve…