Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Frerot, Irénée"'
In this paper, we investigate deliberation procedures that invite citizens with contextual opinions to explore alternative thinking frames. Contextuality is captured in a simple quantum cognitive model. We show how disagreeing citizens endowed with c
Externí odkaz:
http://arxiv.org/abs/2411.19596
We investigate the potential of deliberation to create consensus among fully-informed citizens. Our approach relies on two cognitive assumptions: i. citizens need a thinking frame (or perspective) to consider an issue; and ii. citizens cannot conside
Externí odkaz:
http://arxiv.org/abs/2410.05862
Autor:
Frérot, Irénée, Roscilde, Tommaso
We introduce a new paradigm for the preparation of deeply entangled states useful for quantum metrology. We show that when the quantum state is an eigenstate of an operator $A$, observables $G$ which are completely off-diagonal with respect to $A$ ha
Externí odkaz:
http://arxiv.org/abs/2407.01025
Autor:
Wang, Jie, Surace, Jacopo, Frérot, Irénée, Legat, Benoît, Renou, Marc-Olivier, Magron, Victor, Acín, Antonio
A ubiquitous problem in quantum physics is to understand the ground-state properties of many-body systems. Confronted with the fact that exact diagonalisation quickly becomes impossible when increasing the system size, variational approaches are typi
Externí odkaz:
http://arxiv.org/abs/2310.05844
Autor:
Müller-Rigat, Guillem, Srivastava, Anubhav Kumar, Kurdziałek, Stanisław, Rajchel-Mieldzioć, Grzegorz, Lewenstein, Maciej, Frérot, Irénée
Publikováno v:
Quantum 7, 1152 (2023)
We introduce a semidefinite programming algorithm to find the minimal quantum Fisher information compatible with an arbitrary dataset of mean values. This certification task allows one to quantify the resource content of a quantum system for metrolog
Externí odkaz:
http://arxiv.org/abs/2306.12711
Autor:
Frérot, Irénée, Vashisht, Amit, Morassi, Martina, Lemaître, Aristide, Ravets, Sylvain, Bloch, Jacqueline, Minguzzi, Anna, Richard, Maxime
Publikováno v:
Phys. Rev. X 13, 041058 (2023)
The elementary excitations in weakly interacting quantum fluids have a non-trivial nature which is at the basis of defining quantum phenomena such as superfluidity. These excitations and the physics they lead to have been explored in closed quantum s
Externí odkaz:
http://arxiv.org/abs/2304.08677
Publikováno v:
Reports on Progress in Physics, Volume 86, Number 11 (2023)
We review methods that allow one to detect and characterise quantum correlations in many-body systems, with a special focus on approaches which are scalable. Namely, those applicable to systems with many degrees of freedom, without requiring a number
Externí odkaz:
http://arxiv.org/abs/2302.00640
Probing quantum entanglement from magnetic-sublevels populations: beyond spin squeezing inequalities
Publikováno v:
Quantum 6, 887 (2022)
Spin squeezing inequalities (SSI) represent a major tool to probe quantum entanglement among a collection of few-level atoms, and are based on collective spin measurements and their fluctuations. Yet, for atomic ensembles of spin-$j$ atoms and ultrac
Externí odkaz:
http://arxiv.org/abs/2203.13547
Publikováno v:
Quantum 6, 778 (2022)
Mutually unbiased bases correspond to highly useful pairs of measurements in quantum information theory. In the smallest composite dimension, six, it is known that between three and seven mutually unbiased bases exist, with a decades-old conjecture,
Externí odkaz:
http://arxiv.org/abs/2203.09429
Publikováno v:
Phys. Rev. Lett. 128, 130601 (2022)
We show that quantum fluctuations display a singularity at thermal critical points, involving the dynamical $z$ exponent. Quantum fluctuations, captured by the quantum variance (I. Fr\'erot and T. Roscilde, Phys. Rev. B 94, 075121 (2016)), can be exp
Externí odkaz:
http://arxiv.org/abs/2110.15019