Zobrazeno 1 - 10
of 258
pro vyhledávání: '"Rigolin G"'
Autor:
Rieznik, A. A., Rigolin, G.
Publikováno v:
Opt. Lett. 30, 1108 (2005)
We present a new method to measure the guided, radiated and total decay rates in one-dimensional waveguides. It is also theoretically shown that large modifications of the total decay rate can be achieved in realistic EDFAs and EDWAs with effective m
Externí odkaz:
http://arxiv.org/abs/physics/0410040
Autor:
Santos, L. F., Rigolin, G.
Publikováno v:
Phys. Rev. A 71, 032321 (2005)
We use a disordered anti-ferromagnetic spin-1/2 chain with anisotropic exchange coupling to model an array of interacting qubits. All qubits have the same level spacing, except two, which are called the defects of the chain. The level spacings of the
Externí odkaz:
http://arxiv.org/abs/quant-ph/0408062
Autor:
Rigolin, G.
Publikováno v:
Phys. Rev. A 71, 032303 (2005)
We explicitly show a protocol in which an arbitrary two qubit a|00> + b|01> + c|10> + d|11> is faithfully and deterministically teleported from Alice to Bob. We construct the 16 orthogonal generalized Bell states which can be used to teleport the two
Externí odkaz:
http://arxiv.org/abs/quant-ph/0407219
Autor:
Rigolin, G.
We show that with the fourpartite quantum channel used to teleport an arbitrary two qubit state, we can construct a superdense coding protocol where it is possible to transmit 4 bits of classical information sending only 2 qubits. Alice and Bob initi
Externí odkaz:
http://arxiv.org/abs/quant-ph/0407193
Autor:
Rigolin, G.
Publikováno v:
Int. J. Quant. Inf. 2, 393 (2004)
We study the entanglement of a two-qubit one dimensional XYZ Heisenberg chain in thermal equilibrium at temperature T. We obtain an analytical expression for the entanglement of formation for this system in terms of the parameters of the Hamiltonian
Externí odkaz:
http://arxiv.org/abs/quant-ph/0311185
Publikováno v:
Phys. Rev. A 69, 042304 (2004)
We use a Heisenberg spin-1/2 chain to investigate how chaos and localization may affect the entanglement of pairs of qubits. To measure how much entangled a pair is, we compute its concurrence, which is then analyzed in the delocalized/localized and
Externí odkaz:
http://arxiv.org/abs/quant-ph/0310177
Autor:
Rigolin, G., Escobar, C. O.
Publikováno v:
Phys. Rev. A 69, 012307 (2004)
We derive two lower bounds on entanglement of formation for arbitrary mixed Gaussian states by two distinct methods. To achieve the first one we use a local measurement procedure derived by Giedke et al [Quantum Inf. and Comp. vol.1, 79 (2001)] that
Externí odkaz:
http://arxiv.org/abs/quant-ph/0307023
Autor:
Rigolin, G., Escobar, C. O.
Publikováno v:
Eur. Phys. J. D 37, 291 (2006)
We construct an explicit model where it can be established if a two mode pure Gaussian system is entangled or not by acting only on one of the parts that constitute the system. Measuring the dispersion in momentum and the time evolution of the disper
Externí odkaz:
http://arxiv.org/abs/quant-ph/0206044
Autor:
Rigolin, G.
Publikováno v:
Found. Phys. Lett. 15, 293-298 (2002)
A generalized uncertainty relation for an entangled pair of particles is obtained if we impose a symmetrization rule for all operators that we should use when doing any calculation using the entangled wave function of the pair. This new relation redu
Externí odkaz:
http://arxiv.org/abs/quant-ph/0008100
Autor:
Cuneo, A., Scarfo, L., Reda, G., Varettoni, M., Quaglia, F. M., Marchetti, M., De Paoli, L., Re, F., Pietrasanta, D., Rigolin, G. M., Orsucci, L., Ibatici, A., Gattei, V., Mauro, F. R., Trentin, L., Laurenti, L., Marasca, R., Foa, R., Angeletti, I., Chiurazzi, F., Del Poeta, G., Rosaria De Paolis, M., Farina, L., Ferrari, A., Gentile, M., Gottardi, D., Gozzetti, A., Leone, M., Levato, L., Maccaferri, M., Malerba, L., Motta, M., Murru, R., Nocilli, L., Olivieri, J., Stefoni, V.
Publikováno v:
Blood