Institution
ICFO – The Institute of Photonic Sciences
Facility•Barcelona, Spain•
About: ICFO – The Institute of Photonic Sciences is a facility organization based out in Barcelona, Spain. It is known for research contribution in the topics: Quantum & Quantum entanglement. The organization has 872 authors who have published 1965 publications receiving 56273 citations.
Topics: Quantum, Quantum entanglement, Plasmon, Graphene, Photon
Papers published on a yearly basis
Papers
More filters
••
TL;DR: A review of real-time dynamics of quantum impurity models and their realizations in quantum devices can be found in this article, where a single spin-1/2 coupled with an infinite collection of harmonic oscillators is considered.
34 citations
••
TL;DR: A new, compact, low power consumption, 32 by 2 single photon avalanche diode (SPAD) array that has no readout noise, low dead time and has high sensitivity in low light conditions, such as in vivo measurements is presented.
Abstract: Speckle contrast optical spectroscopy (SCOS) measures absolute blood flow in deep tissue, by taking advantage of multi-distance (previously reported in the literature) or multi-exposure (reported here) approach. This method promises to use inexpensive detectors to obtain good signal-to-noise ratio, but it has not yet been implemented in a suitable manner for a mass production. Here we present a new, compact, low power consumption, 32 by 2 single photon avalanche diode (SPAD) array that has no readout noise, low dead time and has high sensitivity in low light conditions, such as in vivo measurements. To demonstrate the capability to measure blood flow in deep tissue, healthy volunteers were measured, showing no significant differences from the diffuse correlation spectroscopy. In the future, this array can be miniaturized to a low-cost, robust, battery operated wireless device paving the way for measuring blood flow in a wide-range of applications from sport injury recovery and training to, on-field concussion detection to wearables.
34 citations
••
26 Apr 2021TL;DR: The main technical result of this work is a tight bound on the von Neumann entropy of one of Alice's measurement outcomes conditioned on a quantum eavesdropper for the family of asymmetric CHSH expressions the authors consider and allowing for an arbitrary amount of noise preprocessing.
Abstract: The simplest device-independent quantum key distribution protocol is based on the Clauser-Horne-Shimony-Holt (CHSH) Bell inequality and allows two users, Alice and Bob, to generate a secret key if they observe sufficiently strong correlations. There is, however, a mismatch between the protocol, in which only one of Alice's measurements is used to generate the key, and the CHSH expression, which is symmetric with respect to Alice's two measurements. We therefore investigate the impact of using an extended family of Bell expressions where we give different weights to Alice's measurements. Using this family of asymmetric Bell expressions improves the robustness of the key distribution protocol for certain experimentally-relevant correlations. As an example, the tolerable error rate improves from 7.15% to about 7.42% for the depolarising channel. Adding random noise to Alice's key before the postprocessing pushes the threshold further to more than 8.34%. The main technical result of our work is a tight bound on the von Neumann entropy of one of Alice's measurement outcomes conditioned on a quantum eavesdropper for the family of asymmetric CHSH expressions we consider and allowing for an arbitrary amount of noise preprocessing.
34 citations
••
TL;DR: In this paper, a Wilson-type discretization of the Gross-Neveu model is proposed to explore correlated symmetry-protected phases of matter using techniques borrowed from high-energy physics.
34 citations
••
21 Apr 2021
TL;DR: In this paper, the authors showed that stable lasing can be achieved in the zero-dimensional corner state in a second-order photonic topological insulator, which is based on the Kagome waveguide array with a rhombic configuration.
Abstract: In comparison with conventional lasers, topological lasers are more robust and can be immune to disorder or defects if lasing occurs in topologically protected states. Previously reported topological lasers were almost exclusively based on the first-order photonic topological insulators. Here, we show that lasing can be achieved in the zero-dimensional corner state in a second-order photonic topological insulator, which is based on the Kagome waveguide array with a rhombic configuration. If gain is present in the corner of the structure, where the topological corner state resides, stable lasing in this state is achieved, with the lowest possible threshold, in the presence of uniform losses and two-photon absorption. When gain acts in other corners of the structure, lasing may occur in edge or bulk states, but it requires substantially larger thresholds, and transition to stable lasing occurs over much larger propagation distances, sometimes due to instabilities, which are absent for lasing in corner states. We find that increasing two-photon absorption generally plays strong stabilizing action for nonlinear lasing states. The transition to stable lasing stimulated by noisy inputs is illustrated. Our work demonstrates the realistic setting for corner state lasers based on higher-order topological insulators realized with waveguide arrays.
34 citations
Authors
Showing all 928 results
Name | H-index | Papers | Citations |
---|---|---|---|
Maciej Lewenstein | 104 | 931 | 47362 |
F. Javier García de Abajo | 75 | 351 | 30221 |
Antonio Acín | 72 | 324 | 19984 |
Frank H. L. Koppens | 69 | 239 | 32754 |
Romain Quidant | 68 | 248 | 18262 |
Leszek Kaczmarek | 67 | 302 | 15985 |
Sefaattin Tongay | 65 | 254 | 20628 |
Zhipei Sun | 65 | 270 | 27030 |
Lluis Torner | 64 | 566 | 17978 |
Georg Heinze | 63 | 354 | 16391 |
Yaroslav V. Kartashov | 54 | 487 | 11174 |
Francesco Ricci | 54 | 295 | 15492 |
Gerasimos Konstantatos | 53 | 160 | 19627 |
Niek F. van Hulst | 53 | 178 | 12400 |
Turgut Durduran | 53 | 289 | 10525 |