Zobrazeno 1 - 10
of 772
pro vyhledávání: '"Albarelli, A."'
We derive fundamental bounds for general quantum metrological models involving both temporal or spatial correlations (mathematically described by quantum combs), which may be effectively computed in the limit of a large number of probes or sensing ch
Externí odkaz:
http://arxiv.org/abs/2410.01881
Autor:
Górecki, Wojciech, Albarelli, Francesco, Felicetti, Simone, Di Candia, Roberto, Maccone, Lorenzo
When using infinite-dimensional probes (such as a bosonic mode), one could in principle obtain infinite precision when estimating some physical parameters. This is unphysical, as it would require infinite resources, so one needs to impose some additi
Externí odkaz:
http://arxiv.org/abs/2409.18791
The treatment of quantum thermodynamic systems beyond weak coupling is of increasing relevance, yet extremely challenging. The evaluation of thermodynamic quantities in strong-coupling regimes requires a nonperturbative knowledge of the bath dynamics
Externí odkaz:
http://arxiv.org/abs/2407.17886
We investigate the precision of estimating the interaction strength between a two-level system (TLS) and a single-photon pulse when the latter is subject to chirping. We consider linear, quadratic, and sinusoidal temporal phases applied to Gaussian a
Externí odkaz:
http://arxiv.org/abs/2405.02723
Autor:
Albarelli, Francesco, Genoni, Marco G.
Publikováno v:
Phys. Lett. A 494, 129260 (2024)
In this manuscript we present a pedagogical introduction to continuously monitored quantum systems. We start by giving a simplified derivation of the Markovian master equation in Lindblad form, in the spirit of collision models and input-output theor
Externí odkaz:
http://arxiv.org/abs/2312.13214
Publikováno v:
Phys. Rev. A 110, 032436 (2024)
Noise affects the performance of quantum technologies, hence the importance of elaborating operative figures of merit that can capture its impact in exact terms. In quantum metrology, the introduction of the Fisher information measurement noise susce
Externí odkaz:
http://arxiv.org/abs/2312.02035
Publikováno v:
Quantum Sci. Technol. 9 035004 (2024)
It depends. For a single molecule interacting with one mode of a biphoton probe, we show that the spectroscopic information has three contributions, only one of which is a genuine two-photon contribution. When all the scattered light can be measured,
Externí odkaz:
http://arxiv.org/abs/2307.02204
Publikováno v:
Phys. Rev. A 108, 062421 (2023)
One of the main advantages expected from using quantum probes as thermometers is non invasiveness, i.e., a negligible perturbation to the thermal sample. However, invasiveness is rarely investigated explicitly. Here, focusing on a pure-dephasing spin
Externí odkaz:
http://arxiv.org/abs/2305.03436
In recent years, the employment of deep learning methods has led to several significant breakthroughs in artificial intelligence. Different from traditional machine learning models, deep learning-based approaches are able to extract features autonomo
Externí odkaz:
http://arxiv.org/abs/2302.02804
Autor:
Innocenti, Luca, Lorenzo, Salvatore, Palmisano, Ivan, Albarelli, Francesco, Ferraro, Alessandro, Paternostro, Mauro, Palma, G. Massimo
Publikováno v:
PRX Quantum 4, 040328, 2023
We provide a new perspective on shadow tomography by demonstrating its deep connections with the general theory of measurement frames. By showing that the formalism of measurement frames offers a natural framework for shadow tomography -- in which ``
Externí odkaz:
http://arxiv.org/abs/2301.13229