Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Mattia Walschaers"'
Autor:
David Barral, Mathieu Isoard, Giacomo Sorelli, Manuel Gessner, Nicolas Treps, Mattia Walschaers
Publikováno v:
New Journal of Physics, Vol 26, Iss 8, p 083012 (2024)
Entanglement and non-Gaussianity are physical resources that are essential for a large number of quantum-optics protocols. Non-Gaussian entanglement is indispensable for quantum-computing advantage and outperforms its Gaussian counterparts in a numbe
Externí odkaz:
https://doaj.org/article/aedc035102374144bc1c482b0d05fafc
Publikováno v:
New Journal of Physics, Vol 26, Iss 7, p 073022 (2024)
Quantum optical metrology aims to identify ultimate sensitivity bounds for the estimation of parameters encoded into quantum states of the electromagnetic field. In many practical applications, including imaging, microscopy, and remote sensing, the p
Externí odkaz:
https://doaj.org/article/69729fae8a7042ecae2c02eb75acd6dc
Autor:
Yu Xiang, Shuheng Liu, Jiajie Guo, Qihuang Gong, Nicolas Treps, Qiongyi He, Mattia Walschaers
Publikováno v:
npj Quantum Information, Vol 8, Iss 1, Pp 1-8 (2022)
Abstract Wigner negativity, as a well-known indicator of nonclassicality, plays an essential role in quantum computing and simulation using continuous-variable systems. The conditional preparation of Wigner-negative states through appropriate non-Gau
Externí odkaz:
https://doaj.org/article/b52667ee11a54b6bb59ab3aa70dc5791
Autor:
Mattia Walschaers
Publikováno v:
Quantum, Vol 7, p 1038 (2023)
Quantum correlations and Wigner negativity are two important signatures of nonclassicality in continuous-variable quantum systems. In this work, we investigate how both are intertwined in the context of the conditional generation of Wigner negativity
Externí odkaz:
https://doaj.org/article/f32ab535dfd54676bbd0e9e7ad060743
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p L032022 (2022)
We determine analytically the quantum Cramér-Rao bound for the estimation of the separation between two point sources in arbitrary Gaussian states. Our analytical expression is valid for arbitrary sources brightness, and determining how different re
Externí odkaz:
https://doaj.org/article/e63f167ef1cf4fe1aab5ffbbf1da3b1d
Autor:
Tomasz Linowski, Konrad Schlichtholz, Giacomo Sorelli, Manuel Gessner, Mattia Walschaers, Nicolas Treps, Łukasz Rudnicki
Publikováno v:
New Journal of Physics, Vol 25, Iss 10, p 103050 (2023)
Super resolution is one of the key issues at the crossroads of contemporary quantum optics and metrology. Recently, it was shown that for an idealized case of two balanced sources, spatial mode demultiplexing (SPADE) achieves resolution better than d
Externí odkaz:
https://doaj.org/article/0c78bd7be6c243d18295b6de00e351f9
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043010 (2022)
We analyze the problem of resolving two mutually coherent point sources with arbitrary quantum statistics, mutual phase, and relative and absolute intensity. We use a sensitivity measure based on the method of moments and compare direct imaging with
Externí odkaz:
https://doaj.org/article/63f5431fcad94dbfb73eb2eb3cd67000
Publikováno v:
PRX Quantum, Vol 3, Iss 3, p 030347 (2022)
Quantum correlations are at the core of current developments in quantum technologies. Certification protocols of entanglement and steering, suitable for continuous-variable non-Gaussian states are scarce and generally highly demanding from an experim
Externí odkaz:
https://doaj.org/article/b635bc19b02249c4b1a526aa3e9cde2b
Publikováno v:
Quantum, Vol 6, p 704 (2022)
Entanglement is an indispensable quantum resource for quantum information technology. In continuous-variable quantum optics, photon subtraction can increase the entanglement between Gaussian states of light, but for mixed states the extent of this en
Externí odkaz:
https://doaj.org/article/a34dd160184f4653a9c31065b3a10e71
Autor:
Mattia Walschaers
Publikováno v:
PRX Quantum, Vol 2, Iss 3, p 030204 (2021)
Gaussian states have played an important role in the physics of continuous-variable quantum systems. They are appealing for the experimental ease with which they can be produced, and for their compact and elegant mathematical description. Nevertheles
Externí odkaz:
https://doaj.org/article/91f140bac1334eb7a1ccfb1a0ce0c53d