Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Rivas, Ángel"'
Autor:
González, Ignacio, Rivas, Ángel
We consider the problem of the general assessment of non-Markovianity in multipartite open quantum systems. To this end, we elaborate on a previously introduced non-Markovian measure to formulate a finite and additive quantifier with appropriate asym
Externí odkaz:
http://arxiv.org/abs/2406.14674
This paper deals with the reliability of random access (RA) protocols for massive wireless smart grid communication (m-SGC). We propose and analyze an improved grant-free RA (GF-RA) protocol for critical SG applications under strict QoS m-SGC require
Externí odkaz:
http://arxiv.org/abs/2305.02108
Autor:
Rivas, Ángel
Publikováno v:
Open Syst. Inf. Dyn. 29, 2250012 (2022)
We construct a dynamical map which is not positive divisible and does not present information backflow either (as measured by trace norm quantifiers). It is formulated for a qutrit system undergoing noninvertible dynamics. This provides an evidence t
Externí odkaz:
http://arxiv.org/abs/2209.03584
Publikováno v:
Phys. Rev. Research 4, 043032 (2022)
Genuinely two-dimensional robust crosscurrents -- which flow against the natural direction of heat flux -- have been missing since the discovery of their one-dimensional counterpart. We provide a setup to realize them on a cubic three-dimensional (3D
Externí odkaz:
http://arxiv.org/abs/2201.11586
Publikováno v:
Phys. Rev. Lett. 128, 120403 (2022)
We study two-dimensional bosonic and fermionic lattice systems under nonequilibrium conditions corresponding to a sharp gradient of temperature imposed by two thermal baths. In particular, we consider a lattice model with broken time-reversal symmetr
Externí odkaz:
http://arxiv.org/abs/2106.05988
Autor:
Pal, Amit Kumar, Schindler, Philipp, Erhard, Alexander, Rivas, Ángel, Martin-Delgado, Miguel-Angel, Blatt, Rainer, Monz, Thomas, Müller, Markus
Publikováno v:
Quantum 6, 632 (2022)
Quantum error correction procedures have the potential to enable faithful operation of large-scale quantum computers. They protect information from environmental decoherence by storing it in logical qubits, built from ensembles of entangled physical
Externí odkaz:
http://arxiv.org/abs/2012.07911
Autor:
Rivas, Ángel
Publikováno v:
Phys. Rev. Lett. 124, 160601 (2020)
A general thermodynamic framework is presented for open quantum systems in fixed contact with a thermal reservoir. The first and second law are obtained for arbitrary system-reservoir coupling strengths, and including both factorized and correlated i
Externí odkaz:
http://arxiv.org/abs/1910.01246
Autor:
Hall, Michael J. W., Rivas, Ángel
Publikováno v:
Phys. Rev. A 100, 062105 (2019)
We look at what type of arguments can rule out the joint reality (or value definiteness) of two observables of a physical system, such as a qubit, and give several strong yet simple no-go results based on assumptions typically weaker than those consi
Externí odkaz:
http://arxiv.org/abs/1908.03387
Autor:
Rivas, Ángel
Publikováno v:
Entropy 21, 725 (2019)
We present a thermodynamic framework for the refined weak coupling limit. In this limit the interaction between system and environment is weak, but not negligible. As a result, the system dynamics becomes non-Markovian breaking divisibility condition
Externí odkaz:
http://arxiv.org/abs/1907.07743