In this paper, we introduce intrinsic non-locality and quantum intrinsic non-locality as quantifiers for Bell non-locality, and we prove that they satisfy certain desirable properties such as faithfulness, convexity, and monotonicity under local operations and shared randomness. We then prove that intrinsic non-locality is an upper bound on the secret-key-agreement capacity of any device-independent protocol conducted using a device characterized by a correlation p, while quantum intrinsic non-locality is an upper bound on the same capacity for a correlation arising from an underlying quantum model. We also prove that intrinsic steerability is faithful, and it is an upper bound on the secret-key-agreement capacity of any one-sided-device-independent protocol conducted using a device characterized by an assemblage . Finally, we prove that quantum intrinsic non-locality is bounded from above by intrinsic steerability.

VL - 22 UR - https://doi.org/10.1088/1367-2630/ab6eaa ER - TY - JOUR T1 - Frustrated quantum spin systems in small triangular lattices studied with a numerical method JF - Phys. Rev. B Y1 - 2019 A1 - Castells-Graells, D. A1 - Yuste, A. A1 - Sanpera, A. VL - 100 UR - https://link.aps.org/doi/10.1103/PhysRevB.100.155119 ER - TY - JOUR T1 - Feynman graphs and the large dimensional limit of multipartite entanglement JF - Journal of Mathematical Physics Y1 - 2018 A1 - Di Martino, Sara A1 - Facchi, Paolo A1 - Florio, Giuseppe VL - 59 UR - http://aip.scitation.org/doi/10.1063/1.5019481http://aip.scitation.org/doi/pdf/10.1063/1.5019481 JO - Journal of Mathematical Physics ER - TY - JOUR T1 - Fluctuation-dissipation theorem for non-equilibrium quantum systems JF - Quantum Y1 - 2018 A1 - Mehboudi, Mohammad A1 - Sanpera, Anna A1 - Parrondo, Juan M. R. VL - 2 UR - https://quantum-journal.orghttps://quantum-journal.org/papers/q-2018-05-24-66/ JO - Quantum ER - TY - JOUR T1 - Flexible resources for quantum metrology JF - New Journal of Physics Y1 - 2017 A1 - Friis, Nicolai A1 - Orsucci, Davide A1 - Skotiniotis, Michalis A1 - Sekatski, Pavel A1 - Dunjko, Vedran A1 - Briegel, Hans J. A1 - Dür, Wolfgang AB - Quantum metrology offers a quadratic advantage over classical approaches to parameter estimation problems by utilising entanglement and nonclassicality. However, the hurdle of actually implementing the necessary quantum probe states and measurements, which vary drastically for different metrological scenarios, is usually not taken into account. We show that for a wide range of tasks in metrology, 2D cluster states (a particular family of states useful for measurement-based quantum computation) can serve as flexible resources that allow one to efficiently prepare any required state for sensing, and perform appropriate (entangled) measurements using only single qubit operations. Crucially, the overhead in the number of qubits is less than quadratic, thus preserving the quantum scaling advantage. This is ensured by using a compression to a logarithmically sized space that contains all relevant information for sensing. We specifically demonstrate how our method can be used to obtain optimal scaling for phase and frequency estimation in local estimation problems, as well as for the Bayesian equivalents with Gaussian priors of varying widths. Furthermore, we show that in the paradigmatic case of local phase estimation 1D cluster states are sufficient for optimal state preparation and measurement. VL - 19 UR - http://stacks.iop.org/1367-2630/19/i=6/a=063044 ER - TY - JOUR T1 - From Log-Determinant Inequalities to Gaussian Entanglement via Recoverability Theory JF - IEEE Transactions on Information Theory Y1 - 2017 A1 - Lami, Ludovico A1 - Hirche, Christoph A1 - Adesso, Gerardo A1 - Winter, Andreas VL - 63 UR - http://ieeexplore.ieee.org/document/8004445/http://xplorestaging.ieee.org/ielx7/18/8071168/08004445.pdf?arnumber=8004445 JO - IEEE Trans. Inform. Theory ER - TY - JOUR T1 - Fifty years of Bell’s theorem JF - Journal of Physics A: Mathematical and Theoretical Y1 - 2014 A1 - Nicolas Brunner A1 - Gühne, Otfried A1 - Huber, Marcus VL - 47 UR - http://stacks.iop.org/1751-8121/47/i=42/a=420301?key=crossref.9d548f14fc7338685392dcd6228de98d ER - TY - JOUR T1 - Full Security of Quantum Key Distribution From No-Signaling Constraints JF - IEEE Transactions on Information Theory Y1 - 2014 A1 - Masanes, Lluis A1 - Renner, Renato A1 - Christandl, Matthias A1 - Winter, Andreas A1 - Barrett, Jonathan VL - 60 IS - 8 JO - IEEE Trans. Inform. Theory ER - TY - JOUR T1 - From Vector Meson Dominance to Quark-Hadron Duality JF - Il Nuovo Cimento Y1 - 2012 A1 - Bramon, Albert AB - A short review of the many contributions to hadron physics made by Mario Greco is presented. The review roughly covers his production between1971 and 1974, just before the advent of QCD, when quark-model ideas, duality principles and vector meson dominance were widely accepted, developed and applied. The present author had the privilege to collaborate with Mario in most of these contributions and looking backward in time to remember the good old days we spent together in Frascati has been a great pleasure. VL - 35C UR - http://arxiv.org/abs/1203.4205 ER - TY - JOUR T1 - Frustration, Area Law, and Interference in Quantum Spin Models JF - Physical Review Letters Y1 - 2008 A1 - Sen(De), Aditi A1 - Sen, Ujjwal A1 - Dziarmaga, Jacek A1 - Sanpera, Anna A1 - Lewenstein, Maciej VL - 101 UR - http://link.aps.org/abstract/PRL/v101/e187202 ER - TY - JOUR T1 - Fixed boundary conditions analysis of the 3d gonihedric Ising model with k=0 JF - Physics Letters B Y1 - 2004 A1 - Baig, Marià A1 - Clua, J. A1 - Johnston, D. A. A1 - Villanova, R. KW - Author Keywords: Spin systems KW - Fixed boundary conditions KW - Gonihedric models KW - Phase transitions AB - The gonihedric Ising model is a particular case of the class of models defined by Savvidy and Wegner intended as discrete versions of string theories on cubic lattices. In this Letter we perform a high statistics analysis of the phase transition exhibited by the 3d gonihedric Ising model with k=0 in the light of a set of recently stated scaling laws applicable to first order phase transitions with fixed boundary conditions. Even though qualitative evidence was presented in a previous paper to support the existence of a first order phase transition at k=0, only now are we capable of pinpointing the transition inverse temperature at $\beta$c=0.54757(63) and of checking the scaling of standard observables. VL - 585 UR - http://www.sciencedirect.com/science?\_ob=ArticleURL&\_udi=B6TVN-4BSN95Y-3&\_user=1517286&\_coverDate=04%2F08%2F2004&\_rdoc=1&\_fmt=high&\_orig=search&\_sort=d&\_docanchor=&view=c&\_acct=C000053449&\_version=1&\_urlVersion=0&\_userid=1517286&md5=b8fb559f9 ER - TY - JOUR T1 - Feynman's path-integral approach for intense-laser-atom interactions JF - Science (New York, N.Y.) Y1 - 2001 A1 - Salieres, P. A1 - Carre, B. A1 - Le Deroff, L. A1 - Grasbon, F. A1 - Paulus, G. G. A1 - Walther, H. A1 - Kopold, R. A1 - Becker, W. A1 - Milosevic, D. B. A1 - Sanpera, A. A1 - Lewenstein, M. AB - Atoms interacting with intense laser fields can emit electrons and photons of very high energies. An intuitive and quantitative explanation of these highly nonlinear processes can be found in terms of a generalization of classical Newtonian particle trajectories, the so-called quantum orbits. Very few quantum orbits are necessary to reproduce the experimental results. These orbits are clearly identified, thus opening the way for an efficient control as well as previously unknown applications of these processes. VL - 292 UR - http://www.sciencemag.org/cgi/content/abstract/292/5518/902 ER - TY - CONF T1 - {Fully Quantum Arbitrarily Varying Channels: Random Coding Capacity and Capacity Dichotomy} T2 - {2018 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY (ISIT)} Y1 - 0 A1 - Boche, Holger A1 - Deppe, Christian A1 - Noetzel, Janis A1 - Winter, Andreas AB - {We consider a model of communication via a fully quantum jammer channel with quantum jammer, quantum sender and quantum receiver, which we dub quantum arbitrarily varying channel (QAVC). Restricting to finite dimensional user and jammer systems, we show, using permutation symmetry and a de Finetti reduction, how the random coding capacity (classical and quantum) of the QAVC is reduced to the capacity of a naturally associated compound channel, which is obtained by restricting the jammer to i.i.d. input states. Furthermore, we demonstrate that the shared randomness required is at most logarithmic in the block length, via a quantum version of the ``elimination of of correlation{''} using a random matrix tail bound. This implies a dichotomy theorem: either the classical capacity of the QAVC is zero, and then also the quantum capacity is zero, or each capacity equals its random coding variant.} JF - {2018 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY (ISIT)} T3 - {IEEE International Symposium on Information Theory} PB - {IEEE; IEEE Informat Theory Soc; NSF; Huawei; Qualcomm} SN - {978-1-5386-4781-3} N1 - {IEEE International Symposium on Information Theory (ISIT), Vail, CO, JUN 17-22, 2018} ER -