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- Centre National de la Recherche ScientifiqueFR208 papers
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13 papers · 2 filters
Estimation of pure qubits on circles
Samuel L. Braunstein, Sibasish Ghosh, Simone Severini
Gisin and Popescu [PRL, 83, 432 (1999)] have shown that more information about their direction can be obtained from a pair of anti-parallel spins compared to a pair of parallel spi…
Quantum information with continuous variables
Samuel L. Braunstein, Peter van Loock
Quantum information is a rapidly advancing area of interdisciplinary research. It may lead to real-world applications for communication and computation unavailable without the expl…
Quantum algorithm to distinguish Boolean functions of different weights
Samuel L. Braunstein, Byung-Soo Choi, Subhamoy Maitra +3
We exploit Grover operator of database search algorithm for weight decision algorithm. In this research, weight decision problem is to find an exact weight w from given two weights…
Practical Implementations of Twirl Operations
M. S. Anwar, L. Xiao, A. J. Short +4
Twirl operations, which convert impure singlet states into Werner states, play an important role in many schemes for entanglement purification. In this paper we describe strategies…
Quantum Searching via Entanglement and Partial Diffusion
Ahmed Younes, Jon Rowe, Julian Miller
In this paper, we will define a quantum operator that performs the inversion about the mean only on a subspace of the system (Partial Diffusion Operator). This operator is used in…
The Lorentz-Dirac force from QED for linear acceleration
Atsushi Higuchi, Giles D. R. Martin
We investigate the motion of a wave packet of a charged scalar particle linearly accelerated by a static potential in quantum electrodynamics. We calculate the expectation value of…