Zobrazeno 1 - 10
of 192
pro vyhledávání: '"Górecki, Wojciech"'
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
Autor:
Shi, Haowei, Brady, Anthony J., Górecki, Wojciech, Maccone, Lorenzo, Di Candia, Roberto, Zhuang, Quntao
The nature of dark matter is a fundamental puzzle in modern physics. A major approach of searching for dark matter relies on detecting feeble noise in microwave cavities. However, the quantum advantages of common quantum resources such as squeezing a
Externí odkaz:
http://arxiv.org/abs/2409.04656
Assuming a Markovian time evolution of a quantum sensing system, we provide a general characterization of the optimal sensitivity scalings with time, under the most general quantum control protocols. We allow the estimated parameter to influence both
Externí odkaz:
http://arxiv.org/abs/2404.03954
Publikováno v:
Phys. Rev. A 110, 032405 (2024)
We give two upper bounds to the mutual information in arbitrary quantum estimation strategies. The first is based on some simple Fourier properties of the estimation apparatus. The second is derived using the first but, interestingly, depends only on
Externí odkaz:
http://arxiv.org/abs/2403.17345
We derive a general upper bound to mutual information in terms of the Fisher information. The bound may be further used to derive a lower bound for the Bayesian quadratic cost. These two provide alternatives to other inequalities in the literature (e
Externí odkaz:
http://arxiv.org/abs/2403.10248
Publikováno v:
Phys. Rev. Lett. 133, 040801 (2024)
We compare critical quantum sensing to passive quantum strategies to perform frequency estimation, in the case of single-mode quadratic Hamiltonians. We show that, while in the unitary case both strategies achieve precision scaling quadratic with the
Externí odkaz:
http://arxiv.org/abs/2402.15559
Autor:
Marciniak, Maciej, Łebek, Maciej, Kopyciński, Jakub, Górecki, Wojciech, Ołdziejewski, Rafał, Pawłowski, Krzysztof
We investigate the effect of a quench from a one-dimensional gas with strong and repulsive local interactions to a strongly attractive one, known as the super-Tonks-Girardeau effect. By incorporating both an optical lattice and non-local interactions
Externí odkaz:
http://arxiv.org/abs/2306.10910
Autor:
Górecki, Wojciech
The Heisenberg limit provides a fundamental bound on the achievable estimation precision with a limited number of $N$ resources used (e.g., atoms, photons, etc.). Using entangled quantum states makes it possible to scale the precision with $N$ better
Externí odkaz:
http://arxiv.org/abs/2304.14370
We investigate dark solitons in two-component Bose systems with competing interactions in one dimension. Such a system hosts a liquid phase stabilized by the beyond-mean field corrections. Using the generalized Gross-Pitaevskii equation, we reveal th
Externí odkaz:
http://arxiv.org/abs/2304.00861