Research / Quantum Optics / Quantum Information
Quantum Optics
Quantum information theory
Antonio Acín, Professor (ICREA), ERC Starting Grant Award

Regular Papers:

Quantum random networks
S. Perseguers, M. Lewenstein, A. Acín, J. I. Cirac
Nature Phys. 6, 539-543 (2010)

Guess your neighbor’s input: a multipartite nonlocal game with no quantum advantage
M. L. Almeida, J. D. Bancal, N. Brunner, A. Acín, N. Gisin, S. Pironio
Phys. Rev. Lett. 104, 230404 (2010)
Highlighted in Physics
Highlighted in Physorg.com

Perfect quantum privacy implies nonlocality
R. Augusiak, D. Cavalcanti, G. Prettico, A. Acín
Phys. Rev. Lett. 104, 230401 (2010)

Random numbers certified by Bell’s theorem
S. Pironio, A. Acín, S. Massar, A. Boyer de la Giroday, D. N. Matsukevich, P. Maunz, S. Olmschenk, D. Hayes,
L. Luo, T. A. Manning, C. Monroe
Nature 464, 1021-1024 (2010)

Convergent relaxations of polynomial optimization problems with noncommuting variables
S. Pironio, M. Navascués, A. Acín
SIAM J. Optim. 20, 2157-2180 (2010)

Unified framework for correlations in terms of local quantum observables
A. Acín, R. Augusiak, D. Cavalcanti, C. Hadley, J. K. Korbicz, M. Lewenstein, Ll. Masanes, M. Piani
Phys. Rev. Lett. 104, 140404 (2010)

Multipartite entanglement percolation
S. Perseguers, D. Cavalcanti, G. J. Lapeyre Jr., M. Lewenstein, A. Acín
Phys. Rev. A 81, 032327 (2010)

Entangled and bound
A. Acín
Nature Phys. 5, 711-712 (2009)
Link to Nature Phys.

Open-system dynamics of graph-state entanglement
D. Cavalcanti, R. Chaves, L. Aolita, L. Davidovich, A. Acín
Phys. Rev. Lett. 103, 030502 (2009)

Space-QUEST: experiments with quantum entanglement in space
R. Ursin, T. Jennewein, J. Kofler, J. M. Perdigues, L. Cacciapuoti, C. J. de Matos, M. Aspelmeyer, A. Valencia,
T. Scheidl, A. Fedrizzi, A. Acin, C. Barbieri, G. Bianco, C. Brukner, J. Capmany, S. Cova, D. Giggenbach, W. Leeb,
R. H. Hadfield, R. Laflamme, N. Lutkenhaus, G. Milburn, M. Peev, T. Ralph, J. Rarity, R. Renner, E. Samain,
N. Solomos, W. Tittel, J. P. Torres, M. Toyoshima, A. Ortigosa-Blanch, V. Pruneri, P. Villoresi, I. Walmsley,
G. Weihs, H. Weinfurter, M. Zukowski, A. Zeilinger
Europhys. News 40, 26-29 (2009)

Scalability of Greenberger-Horne-Zeilinger and random-state entanglement in the presence of decoherence
L. Aolita, D. Cavalcanti, A. Acin, A. Salles, M. Tiersch, A. Buchleitner, F. de Melo
Phys. Rev. A 79, 032322 (2009)

Nonsecret correlations can be used to distribute secrecy
J. Bae, T. Cubitt, A. Acín
Phys. Rev. A 79, 032304 (2009)

Tests of multimode quantum nonlocally with homodyne measurements
A. Acín, A. J. Cerf, A. Ferraro, J. Niset
Phys. Rev. A 79, 012112 (2009)

Structural approximations to positive maps and entanglement-breaking channels
J. K. Korbicz, M. L. Almeida, J. Bae, M. Lewenstein, A. Acín
Phys. Rev. A 78, 062105 (2008)

Quantum nonlocality and partial transposition for continuous-variable systems
A. Salles, D. Cavalcanti, A. Acín
Phys. Rev. Lett. 101, 040404 (2008)

Distillable entanglement and area laws in spin in harmonic-oscillator systems
D. Cavalcanti, A. Ferraro, A. García-Sáez, A. Acín
Phys. Rev. A 78, 012335 (2008)

A convergent hierarchy of semidefine programs characterizing the set of quantum correlations
M. Navascués, S. Pironio, A. Acín
New J. Phys. 10, 073013 (2008)
Highlighted in New Journal of Physics Best of 2008

Testing the dimension of Hilbert spaces
N. Brunner, S. Pironio, A. Acín, N. Gisin, A. A. Méthod, V. Sacarani
Phys. Rev. Lett. 100, 210503 (2008)

Pure state estimation and the characterization of entanglement
M. Navascués
Phys. Rev. Lett. 100, 070503 (2008)

Thermal bound entanglement in macroscopic systems and area law
A. Ferraro, D. Cavalcanti, A. García-Saez, A. Acín
Phys. Rev. Lett. 100, 080502 (2008)

Scaling laws for the decay of multiqubit entanglement
L. Aolita, R. Chaves, D. Cavalcanti, A. Acín, L. Davidovich
Phys. Rev. Lett. 100, 080501 (2008)

Monogamy and ground-state entanglement in highly connected systems
A. Ferraro, A. García-Saez, A. Acín
Phys. Rev. A 76, 052321 (2007)

Multipartite entanglement of superpositions
D. Cavalcanti, M. O. Terra Cunha, A. Ací­n
Phys. Rev. A 76, 042329 (2007)

Useful entanglement from the Pauli principle
D. Cavalcanti, L. M. Malard, F. M. Matinaga, M. O. Terra Cunha, M. França Santos
Phys. Rev. B 76, 113304 (2007)

Noise robustness of the nonlocality of entangled quantum states
M. L. Almeida, S. Pironio, J. Barrett, G. Tóth, A. Acín
Phys. Rev. Lett. 99, 040403 (2007)

Superiority of entangled measurements over all local strategies for the estimation of product coherent states
J. Niset, A. Acín, U. L. Andersen, N. J. Cerf, R. García-Patrón, M. Navascués, M. Sabuncu
Phys. Rev. Lett. 98, 260404 (2007)

Device-independent security of quantum cryptography against collective attacks
A. Acín, N. Brunner, N. Gisin, S. Massar, S. Pironio, V. Scarani
Phys. Rev. Lett. 98, 230501 (2007)

Discriminating states: the quantum chernoff bound
K. M. R. Audenaert, J. Calsamiglia, R. Muñoz-Tapia, E. Bagan, Ll. Masanes, A. Acín, F. Verstraete
Phys. Rev. Lett. 98, 160501 (2007)

Entanglement percolation in quantum networks
A. Acín, J. I. Cirac, M. Lewenstein
Nature Phys. 3, 256-259 (2007)
Link to Nature Phys.

Key distillation from quantum channels using two-way communication protocols
J. Bae, A. Acín
Phys. Rev. A 75, 012334 (2007)

Modeling Pauli measurements on graph states with nearest-neighbor classical communication
J. Barrett, C. M. Caves, B. Eastin, M. B. Elliott, S. Pironio
Phys. Rev. A 75, 012103 (2007)

Bounding the set of quantum correlations
M. Navascués, S. Pironio, A. Acín
Phys. Rev. Lett. 98, 010401 (2007)

Optimality of Gaussian attacks in continuous-variable quantum cryptography
M. Navascués, F. Grosshans, A. Acín
Phys. Rev. Lett. 97, 190502 (2006)

Multipartite secret correlations and bound information
L. Masanes, A. Acín
IEEE Transactions on Information Theory 52, 4686-4694 (2006)

Secrecy extraction from no-signaling correlations
V. Scarani, N. Gisin, N. Brunner, L. Masanes, S. Pino, A. Acín
Phys. Rev. A 74, 042339 (2006)

Maximally nonlocal and monogamous quantum correlations
J. Barrett, A. Kent, S. Pironio
Phys. Rev. Lett. 97, 170409 (2006)

Genuine tripartite entangled states with a local hidden-variable model
G. Tóth, A. Acín
Phys. Rev. A 74, 030306(R) (2006)

From Bell's theorem to secure quantum key distribution
A. Acín, N. Gisin, L. Masanes
Phys. Rev. Lett. 97, 120405 (2006)

Efficient quantum key distribution secure against no-signalling eavesdroppers
A. Acín, S. Massar, S. Pironio
New J. Phys. 8, 126 (2006)

Asymtotic quantum cloning is state estimation
J. Bae, A. Acin
Phys. Rev. Lett. 97, 030402 (2006)

Spectral engineering of entangled two-photon states
S. Carrasco, A. V. Sergienko, B. E. A. Saleh, M. C. Teich, J. P. Torres, L. Torner
Phys. Rev. A 73, 063802 (2006)

General properties of nonsignaling theories
Ll. Masanes, A. Acin, N. Gisin
Phys. Rev. A 73, 012112 (2006)

Secrecy properties of quantum channels
A. Acín, J. Bae, E. Bagan, M. Baig, L. Masanes, R. Muñoz-Tapia
Phys. Rev. A 73, 012327 (2006)

Optimal Bell tests do not require maximally entangled states
A. Acín, R. Gill, N. Gisin
Phys. Rev. Lett. 95, 210402 (2005)

Quantum cloning
V. Scarani, S. Iblisdir, N. Gisin, A Acín
Rev. Mod. Phys. 77, 1225-1256 (2005)

Multipartite asymmetric quantum cloning
S. Iblisdir, A. Acín, N. J. Cerf, R. Filip, J. Fiurášek, N. Gisin
Phys. Rev. A 72, 042328 (2005)

Experimental methods for detecting entanglement
J. B. Altepeter, E. R. Jeffrey, P. G. Kwiat, S. Tanzilli, N. Gisin, A. Acín
Phys. Rev. Lett. 95, 033601 (2005)

Gaussian operations and privacy
M. Navascués, A. Acín
Phys. Rev. A 72, 012303 (2005)

Nonlocality of cluster states of qubits
V. Scarani, A. Acín, E. Schenck, M. Aspelmeyer
Phys. Rev. A 71, 042325 (2005)

Multiple-copy two-state discrimination with individual measurements
A. Acín, E. Bagan, M. Baig, Ll. Masanes, R. Muñoz-Tapia
Phys. Rev. A 71, 032338 (2005)

Quantum correlations and secret bits
A. Acín, N. Gisin
Phys. Rev. Lett. 94, 020501 (2005)

Security bounds for continuous variables quantum key distribution
M. Navascués, A.Acín
Phys. Rev. Lett. 94, 020505 (2005)

Quantum key destillation from Gaussian states by Gaussian operations
M. Navascués, J. Bae, I. Cirac, M. Lewenstein, A. Sanpera, A. Acín
Phys. Rev. Lett. 94, 010502 (2005)

Atomic quantum gases in Kagomé lattices
L. Santos, M.A. Baranov, J.I. Cirac, H.-U. Everts, H. Fehrmann, M. Lewenstein
Phys. Rev. Lett. 93, 030601 (2004)

Bell-type test of energy-time entangled Qutrits
R. T. Thew, A. Acín, H. Zbinden, N. Gisin
Phys. Rev. Lett. 93, 010503 (2004)

Coincidence Bell inequality for three three-dimensional systems
A. Acín, J. L. Chen, N. Gisin, D. Kaszlikowski, L. C. Kwek, C. H. Oh, M. Zukowski
Phys. Rev. Lett. 92, 250404 (2004)

Experimental realization of entangled qutrits for quantum communication
R. Thew, A. Acín, H. Zbinden, N. Gisin
Quant. Inf. and Comp. 4, 93-102 (2004)

Multipartite bound information exists and can be activated
A. Acín, I. Cirac, L. Masanes
Phys. Rev. Lett. 92, 107903 (2004)

Bell's inequalities detect efficient entanglement
A. Acín, N. Gisin, L. Masanes, V. Scarani
Int. J. Quantum Inf 2, 23-31 (2004)

Equivalence between two-Qubit entanglement and secure key distribution
A. Acín, L. Masanes, N. Gisin
Phys. Rev. Lett. 91, 167901 (2003)

Invited talks:

Quantum cryptography
A. Acín
EURESCO IQING 03, Munich, Germany, December 2003

Talks:

Space-QUEST: experiments with quantum entanglement in space
R. Ursin, T. Jennewein, J. Kofler, J. M. Perdigues, L. Cacciapuoti, C. J. de Matos, M. Aspelmeyer, A. Valencia, T. Scheidl, A. Fedrizzi, A. Acin, C. Barbieri, G. Bianco, C. Brukner, J. Capmany, S. Cova, D. Giggenbach, W. Leeb, R. H. Hadfield, R. Laflamme, N. Lutkenhaus, G. Milburn, M. Peev, T. Ralph, J. Rarity, R. Renner, E. Samain, N. Solomos, W. Tittel, J. P. Torres, M. Toyoshima, A. Ortigosa-Blanch, V. Pruneri, P. Villoresi, I. Walmsley, G. Weihs, H. Weinfurter, M. Zukowski, A. Zeilinger
59th International Astronautical Congress (IAC) 2008, Glasgow, United Kingdom, 29 September-3 October 2008

Correlaciones cuanticas y criptografía
A. Acin, L. Masanes, N. Gisin
XXIX Bienal de Física, Madrid, July 2003

Posters:

Key destillation from Gaussian states by Gaussian operations
M. Navascues, J. Bae, I. Cirac, M. Lewenstein, A. Sanpera, A. Acín
Continuous Variables Quantum Information Processing, Veilbronn, Germany, April 2004
M. Navascues

Quantum cryptography protocols more robust against photon number spliting attacks
V. Scarani, A. Acín, G. Ribordy, N. Gisin
Conference on Quantum Information, Erice, Italy, March 2003
A. Acín

Masters Theses:

Algoritmes basats en teoria quàntica de la informació
Artur Garcia Saez
Enginyer Superior Informàtica

PhD Theses:

Resources for quantum information tasks: from the bipartite to the multipartite scenario
M. Almeida
Doctor

Entanglement and classical correlations in many-body systems
A. García
Doctor

Entanglement: from its mathematical description to its experimental observation
D. Cavalcanti
Doctor

Quantum information in infinite dimensional hilbert spaces
M. Navascués
Doctor

Entanglement and quantum cryptography
J. Bae
Doctor

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