Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Dario Tamascelli"'
Publikováno v:
PRX Quantum, Vol 3, Iss 2, p 020310 (2022)
We consider the problem of frequency estimation for a single bosonic field evolving under a squeezing Hamiltonian and continuously monitored via homodyne detection. In particular, we exploit reinforcement learning techniques to devise feedback contro
Externí odkaz:
https://doaj.org/article/d816e82244674adca2ecc70e0501dd2d
Autor:
Dario Tamascelli
Publikováno v:
Entropy, Vol 22, Iss 11, p 1320 (2020)
The chain mapping of structured environments is a most powerful tool for the simulation of open quantum system dynamics. Once the environmental bosonic or fermionic degrees of freedom are unitarily rearranged into a one dimensional structure, the ful
Externí odkaz:
https://doaj.org/article/1257ed1e85f341c0b473d98197f4aba0
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 5, p 053036 (2019)
Using the paradigm of information backflow to characterize a non-Markovian evolution, we introduce so-called precursors of non-Markovianity, i.e. necessary properties that the system and environment state must exhibit at earlier times in order for an
Externí odkaz:
https://doaj.org/article/659b50881b51456dad4edd47bf401749
Publikováno v:
Quantum, Vol 2, p 110 (2018)
We study quantum frequency estimation for $N$ qubits subjected to independent Markovian noise, via strategies based on time-continuous monitoring of the environment. Both physical intuition and an extended convexity property of the quantum Fisher inf
Externí odkaz:
https://doaj.org/article/24b7c6c325834b75859e8f10886a8698
The elucidation of the mechanisms behind chiral-induced spin selectivity remains an outstanding scientific challenge. Here we consider the role of delocalised phonon modes in electron transport in chiral structures and demonstrate that spin selectivi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06e603b645a32f1cfb8ef12012c926a6
http://arxiv.org/abs/2209.05323
http://arxiv.org/abs/2209.05323
We determine the conditions for the equivalence between the multi-time expectation values of a general finite-dimensional open quantum system when interacting with, respectively, an environment undergoing a free unitary evolution or a discrete enviro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfb6d14bd65f6456cfb7b9c434bdafb3
http://arxiv.org/abs/2209.00293
http://arxiv.org/abs/2209.00293
Autor:
Alexander Nüßeler, Dario Tamascelli, Andrea Smirne, James Lim, Susana F. Huelga, Martin B. Plenio
Publikováno v:
Physical review letters. 129(14)
We exploit the properties of chain mapping transformations of bosonic environments to identify a finite collection of modes able to capture the characteristic features, or fingerprint, of the environment. Moreover we show that the countable infinity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc5176f9f48230192623f55168bf4237
https://pubmed.ncbi.nlm.nih.gov/36240420
https://pubmed.ncbi.nlm.nih.gov/36240420
We address multi-parameter quantum estimation for one-dimensional discrete-time quantum walks and its applications to quantum metrology. We use the quantum walker as a probe for unknown parameters encoded on its coin degrees of freedom. We find an an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7b124fd2da2ebde3614239e6163fffe
http://arxiv.org/abs/2110.02032
http://arxiv.org/abs/2110.02032
Continuous-time quantum walks (CTQW) have shown the capability to perform efficiently the spatial search of a marked site on many kinds of graphs. However, most of such graphs are hard to realize in an experimental setting. Here we study CTQW spatial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3a955fcd90d9dfbbcc299f84c5b1fc0
http://arxiv.org/abs/2106.03867
http://arxiv.org/abs/2106.03867