Sample records for ENREDO CUANTICO (quantum entanglement)
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1

Spin entanglement loss by local correlation transfer to the momentum

Lamata, Lucas; León García, Juan José; Salgado, David

7 pages, 7 figures.-- PACS nrs.: 03.67.Mn, 03.65.Yz, 03.65.Ud.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0603225 | We show the decrease of spin-spin entanglement between two s= 1/2 fermions or two photons due to local transfer of correlations from the spin to the momentum degree ...

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2

Spin entanglement loss by local correlation transfer to the momentum

Lamata, Lucas; León García, Juan José; Salgado, David
2006-05-31

Digital.CSIC (Spain)

4

Sequential Quantum Cloning

Delgado, Y.; Lamata, Lucas; León García, Juan José; Salgado, D.; Solano, E.

4 pages, 1 table.-- PACS nrs.: 03.67.Mn; 03.67.Dd.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0607105 | Not all unitary operations upon a set of qubits can be implemented by sequential interactions between each qubit and an ancillary system. We analyze the specific case of sequent...

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5

Sequential Quantum Cloning

Delgado, Y.; Lamata, Lucas; León García, Juan José; Salgado, D.; Solano, E.
2007-04-13

Digital.CSIC (Spain)

6

Sequential Implementation of Global Quantum Operations

Lamata, Lucas; León García, Juan José; Pérez-García, D.; Salgado, D.; Solano, E.
2008-10-31

Digital.CSIC (Spain)

7

Quantum properties of tranverse pattern formation in second-harmonic generation

Bache, Morten; Scotto, Pierre; Zambrini, Roberta; San Miguel, Maxi; Saffman, Mark
2002-07-19

Digital.CSIC (Spain)

9

Polarization quantum properties in a type-II Optical Parametric Oscillator below threshold

Zambrini, Roberta; Gatti, Alessandra; Lugiato, Luigi A.; San Miguel, Maxi
2003-12-10

Digital.CSIC (Spain)

10

Photon exchange and correlation transfer in atom-atom entanglement dynamics

León García, Juan José; Sabín, Carlos

6 pages, 8 figures.-- PACS nrs.: 03.67.Bg; 03.65.Ud; 42.50.Ct.-- ArXiv pre-print available at: http://arxiv.org/abs/0811.2647 | We analyze the entanglement dynamics of a system composed by a pair of neutral two-level atoms that are initially entangled, and the electromagnetic field, initially in the...

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13

Multiphoton multimode polarization entanglement in parametric down-conversion

Gatti, Alessandra; Zambrini, Roberta; San Miguel, Maxi; Lugiato, Luigi A.

17 pages, 10 figures, 2 appendices.-- PACS nrs.: 42.50.Dv, 42.65.Lm.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0306133 | Previously published as proceeding at the European Quantum Electronics Conference, 2003 (EQEC'03), https://digital.csic.es/handle/10261/15052 | We study the qu...

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14

Multiphoton multimode polarization entanglement in parametric down-conversion

Gatti, Alessandra; Zambrini, Roberta; San Miguel, Maxi; Lugiato, Luigi A.
2003-11-19

Digital.CSIC (Spain)

15

Multidimensional quantum cosmic models: New solutions and gravitational waves

González-Díaz, Pedro F.; Rozas-Fernández, Alberto
2010-01-01

Digital.CSIC (Spain)

16

Multi-photon, multi-mode polarization entanglement in parametric down-conversion

Gatti, Alessandra; Zambrini, Roberta; San Miguel, Maxi; Lugiato, Luigi A.

1 page.-- Contributed to: European Quantum Electronics Conference 2003 (EQEC'03, Munich, Germany, Jun 22-27, 2003). | Later published as paper in: Physical Review A 68(5): 053807 (Nov 2003), https://digital.csic.es/handle/10261/14830. | The paper addresses the problem as to whether the microscopic p...

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17

Multi-photon, multi-mode polarization entanglement in parametric down-conversion

Gatti, Alessandra; Zambrini, Roberta; San Miguel, Maxi; Lugiato, Luigi A.
2003-06-01

Digital.CSIC (Spain)

18

Maximally entangled mixed states and conditional entropies

Batle, Josep; Casas, Montserrat; Plastino, Ángel; Plastino, Ángel R.

4 pages, 2 figures.-- PACS nrs.: 03.67.Mn, 89.70.+c.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0603056 | The maximally entangled mixed states of Munro et al. [Phys. Rev. A 64, 030302 (2001)] are shown to exhibit interesting features vis á vis conditional entropic measures. The sa...

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19

Maximally entangled mixed states and conditional entropies

Batle, Josep; Casas, Montserrat; Plastino, Ángel R.; Plastino, Ángel R. R.
2005-02-14

Digital.CSIC (Spain)

20

Inductive entanglement classification of four qubits under stochastic local operations and classical communication

Lamata, Lucas; León García, Juan José; Salgado, D.; Solano, E.

9 pages, 1 table.-- PACS nrs.: 03.67.Mn; 03.65.Ud; 02.10.Yn.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0610233 | Using an inductive approach to classify multipartite entangled states under stochastic local operations and classical communication introduced recently by the authors ...

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22

Inductive classification of multipartite entanglement under stochastic local operations and classical communication

Lamata, Lucas; León García, Juan José; Salgado, D.; Solano, E.

10 pages, no figures.-- PACS nrs.: 03.67.Mn; 03.65.Ud; 02.10.Yn.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0603243 | We propose an inductive procedure to classify N-partite entanglement under stochastic local operations and classical communication provided such a classification i...

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24

Holographic entanglement entropy probes (non)locality

Fernández Barbón, José L.; Fuertes, Carlos A.

Submitted on 13 Mar 2008 (v1), last revised 3 Apr 2008 (this version, v2).-- 24 pages and 8 figures; added references, corrected some typos and added a full NEW SECTION with an explicit result linking holography, Lorentz invariance and area law of entanglement entropy. | We study the short-distance ...

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25

Holographic entanglement entropy probes (non)locality

Fernández Barbón, José L.; Fuertes, Carlos A.
2008-04-03

Digital.CSIC (Spain)

26

Generation of bipartite spin entanglement via spin-independent scattering

Lamata, Lucas; León García, Juan José

4 pages, 3 figures.-- PACS nrs.: 03.67.Mn; 03.65.Ud.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0602090 | We consider the bipartite spin entanglement between two identical fermions generated in spin-independent scattering. We show how the spatial degrees of freedom act as ancillas...

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28

Generation of atom-atom correlations inside and outside the mutual light cone

León García, Juan José; Sabín, Carlos

7 pages, 3 figures.-- PACS nrs.: 03.67.Bg, 03.65.Ud, 42.50.Ct.-- ArXiv pre-print available at: http://arxiv.org/abs/0804.4641 | We analyze whether a pair of neutral two level atoms can become entangled in a finite time while they remain causally disconnected. The interaction with the electromagnetic...

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30

Entanglement swapping between spacelike-separated atoms

León García, Juan José; Sabín, Carlos

4 pages, 4 figures.-- PACS nrs.: 03.67.Bg; 03.65.Ud; 42.50.Ct.-- ArXiv pre-print available at: http://arxiv.org/abs/0807.2711 | We show a mechanism that projects a pair of neutral two-level atoms from an initially uncorrelated state to a maximally entangled state while they remain spacelike separate...

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31

Entanglement swapping between spacelike-separated atoms

León García, Juan José; Sabín, Carlos
2008-11-10

Digital.CSIC (Spain)

32

Entanglement dynamics in presence of diversity under decohering environments

Galve, Fernando; Giorgi, Gian Luca; Zambrini, Roberta
2010-02-01

Digital.CSIC (Spain)

33

Dynamics of entanglement via propagating microwave photons

Sabín, Carlos; García-Ripoll, Juan José; Solano, Enrique; León, Juan
2010-05-04

Digital.CSIC (Spain)

34

Cálculo de la concurrencia para el modelo de Heisenberg/ Calculation of concurrence to the Heisenberg model

Castellanos, R; Franco, R; Silva-Valencia, J
2010-09-01

Resumen en español La concurrencia es una cantidad que nos permite medir el grado de entreveramiento que presenta un sistema cuántico y se puede calcular a partir de la matriz densidad reducida. En este artículo mostramos explicitamente como calcular la concurrencia para una cadena finita de espines s =1/2 descrita por el modelo de Heisenberg anistrópico. Nosotros mostramos que para cadenas finitas la concurrencia tiene un máximo en el punto crítico Δ = 1, la cual es una de las pr (mas) incipales características en el límite termodinámico. Se mostró que es posible obtener información sobre las transiciones de fase del modelo calculando la concurrencia para cadenas de por lo menos 12 sitios Resumen en inglés The concurrence is a quantity that allows us to measure the entanglement of a quantum system and can be calculated from the reduced density matrix. In this paper we show explicitly how to calculate the concurrence for a finite chain of spins s =1/2 described by the anisotropic Heisenberg model. We show that for finite chains the concurrence has a maximum at the critical point Δ = 1, which is the main feature in the thermodynamic limit. We observe that it is possible (mas) to obtain information about quantum phase transitions of the model by calculating the concurrence for chains of at least 12 sites

Scientific Electronic Library Online (Spanish)

35

Connection between entanglement and the speed of quantum evolution

Batle, Josep; Casas, Montserrat; Plastino, Ángel; Plastino, Ángel R.

5 pages, 3 figures.-- PACS nrs.: 03.67.Mn, 89.70.+c, 03.65.-w, 02.50.-r.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0507030v1 | It has been recently pointed out [V. Giovannetti, S. Lloyd, and L. Maccone, Europhys. Lett. 62, 615 (2003)] that, for certain classes of states, quantum ...

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36

Connection between entanglement and the speed of quantum evolution

Batle, Josep; Casas, Montserrat; Plastino, Ángel R.; Plastino, Ángel R. R.
2005-09-29

Digital.CSIC (Spain)

40

A case of entanglement generation between causally disconnected atoms

León García, Juan José; Sabín, Carlos

7 pages, 4 figures.-- ArXiv pre-print available at: http://arxiv.org/abs/0805.2110 | We analyze the entanglement generated in a finite time between a pair of space-like separated atoms, one of which emits a photon. As we show to order e2, the origin of entanglement can be traced back to the uncertai...

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