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26 papers · 2 filters
Information-Disturbance Tradeoff in Quantum State Discrimination
Francesco Buscemi, Massimiliano F. Sacchi
When discriminating between two pure quantum states, there exists a quantitative tradeoff between the information retrieved by the measurement and the disturbance caused on the unk…
Casimir-Polder force density between an atom and a conducting wall
R. Messina, R. Passante
In this paper we calculate the Casimir-Polder force density (force per unit area acting on the elements of the surface) on a metallic plate placed in front of a neutral atom. To ob…
Nonlocal field correlations and dynamical Casimir-Polder forces between one excited- and two ground-state atoms
R. Passante, F. Persico, L. Rizzuto
The problem of nonlocality in the dynamical three-body Casimir-Polder interaction between an initially excited and two ground-state atoms is considered. It is shown that the nonloc…
Continuous Variable Quantum Cryptography using Two-Way Quantum Communication
Stefano Pirandola, Stefano Mancini, Seth Lloyd +1
Quantum cryptography has been recently extended to continuous variable systems, e.g., the bosonic modes of the electromagnetic field. In particular, several cryptographic protocols…
Electron Fabry-Perot interferometer with two entangled magnetic impurities
F. Ciccarello, G. M. Palma, M. Zarcone +2
We consider a one-dimensional (1D) wire along which single conduction electrons can propagate in the presence of two spin-1/2 magnetic impurities. The electron may be scattered by…
A minimum-disturbing quantum state discriminator
Francesco Buscemi, Massimiliano F. Sacchi
We propose two experimental schemes for quantum state discrimination that achieve the optimal tradeoff between the probability of correct identification and the disturbance on the…