Zobrazeno 1 - 10
of 423
pro vyhledávání: '"Matteo G A Paris"'
Publikováno v:
New Journal of Physics, Vol 26, Iss 5, p 053024 (2024)
We address quantum characterization of anisotropic spin chains in the presence of anti-symmetric exchange, and investigate whether the Hamiltonian parameters of the chain may be estimated with precision approaching the ultimate limit imposed by quant
Externí odkaz:
https://doaj.org/article/86e80a7830314171aae20d6add393734
Publikováno v:
New Journal of Physics, Vol 22, Iss 8, p 083027 (2020)
Quantum probing is the art of exploiting simple quantum systems interacting with a complex environment to extract precise information about some environmental parameters, e.g. the temperature of the environment or its spectral density. Here we analyz
Externí odkaz:
https://doaj.org/article/6ebec6f3f0634be7b7f179d7b14163c1
Publikováno v:
New Journal of Physics, Vol 21, Iss 10, p 103045 (2019)
We address state reconstruction by photon-number-resolving detectors, and demonstrate that they may be effectively exploited to perform quantum tomography of states of light. In particular, we find that the pattern function technique, originally deve
Externí odkaz:
https://doaj.org/article/66cc7fe3c5964d928a3d09a7c37dd8f5
Publikováno v:
New Journal of Physics, Vol 19, Iss 12, p 123011 (2017)
We address the estimation of the magnetic field B acting on an ensemble of atoms with total spin J subjected to collective transverse noise. By preparing an initial spin coherent state, for any measurement performed after the evolution, the mean-squa
Externí odkaz:
https://doaj.org/article/84629ae5373343b9b1a110480a9c4da5
Publikováno v:
New Journal of Physics, Vol 19, Iss 5, p 053015 (2017)
We suggest and demonstrate a tomographic method to characterise homodyne detectors at the quantum level. The positive operator measure associated with the detector is expanded in a quadrature basis and probed with a set of coherent states. The coeffi
Externí odkaz:
https://doaj.org/article/3f02d7dc7a2a4c9182ac72951444abcd
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-7 (2022)
Abstract We address propagation and entanglement of Gaussian states in optical media characterised by nontrivial spectral densities. In particular, we consider environments with a finite bandwidth $$J(\omega ) = J_0 \left[ \theta (\omega -\Omega ) -
Externí odkaz:
https://doaj.org/article/e63a6635d9554da5b5007f8990147e26
Publikováno v:
Communications Physics, Vol 4, Iss 1, Pp 1-8 (2021)
Quantum compilers are characterized by a trade-off between the length of the sequences, the precompilation time, and the execution time. Here, the authors propose an approach based on deep reinforcement learning to approximate unitary operators as ci
Externí odkaz:
https://doaj.org/article/ab73e5736a1642b98d3c091262945c6e
Autor:
Alessandro Candeloro, Sholeh Razavian, Matteo Piccolini, Berihu Teklu, Stefano Olivares, Matteo G. A. Paris
Publikováno v:
Entropy, Vol 23, Iss 10, p 1353 (2021)
Active optical media leading to interaction Hamiltonians of the form H=λ˜(a+a†)ζ represent a crucial resource for quantum optical technology. In this paper, we address the characterization of those nonlinear media using quantum probes, as oppose
Externí odkaz:
https://doaj.org/article/418b99a37062488eb3cd0155a8587249
Publikováno v:
Physical Review Research. 5
We address multiparameter quantum estimation for coherently driven nonlinear Kerr resonators in the presence of loss. In particular, we consider the realistic situation in which the parameters of interest are the loss rate and the nonlinear coupling,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff5fb1d6c75c7af4ce2554fa895613a0
https://doi.org/10.1103/physrevresearch.5.013185
https://doi.org/10.1103/physrevresearch.5.013185
We propose a near-optimum receiver for the discrimination of binary phase-shift-keyed coherent states employing photon-number-resolving detectors. The receiver exploits a discrimination strategy based on both the so-called homodyne-like and the direc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::782b0707128afbbed2df36ea9f1ed24c
https://hdl.handle.net/2434/958800
https://hdl.handle.net/2434/958800
