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 -