Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Giarmatzi, Christina"'
Autor:
Roy, Abhinash Kumar, Srivastava, Varun, Mahanti, Soumik, Giarmatzi, Christina, Gilchrist, Alexei
The characterization of multi-time correlations in open quantum systems is of fundamental importance. In this work, we investigate multi-time processes using the process matrix formalism and show that the presence of a quantum non-Markovian environme
Externí odkaz:
http://arxiv.org/abs/2309.16190
Autor:
Giarmatzi, Christina, Jones, Tyler, Gilchrist, Alexei, Pakkiam, Prasanna, Fedorov, Arkady, Costa, Fabio
Current quantum technologies are at the cusp of becoming useful, but still face formidable obstacles such as noise. Noise severely limits the ability to scale quantum devices to the point that they would offer an advantage over classical devices. To
Externí odkaz:
http://arxiv.org/abs/2308.00750
Akademický článek
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Autor:
Giarmatzi, Christina, Costa, Fabio
Publikováno v:
Quantum 5, 440 (2021)
We present a method to detect quantum memory in a non-Markovian process. We call a process Markovian when the environment does not provide a memory that retains correlations across different system-environment interactions. We define two types of non
Externí odkaz:
http://arxiv.org/abs/1811.03722
Processes with an indefinite causal structure may violate a causal inequality, which quantifies quantum correlations that arise from a lack of causal order. In this paper, we show that when the inequalities are analysed with a Gaussian-localised fiel
Externí odkaz:
http://arxiv.org/abs/1804.05498
Autor:
Giarmatzi, Christina, Costa, Fabio
Publikováno v:
npj Quantum Information 4, 17 (2018)
Finding a causal model for a set of classical variables is now a well-established task---but what about the quantum equivalent? Even the notion of a quantum causal model is controversial. Here, we present a causal discovery algorithm for quantum syst
Externí odkaz:
http://arxiv.org/abs/1704.00800
Publikováno v:
Phys. Rev. A 94, 032131 (2016)
We consider the most general correlations that can be obtained by a group of parties whose causal relations are well-defined, although possibly probabilistic and dependent on past parties' operations. We show that, for any fixed number of parties and
Externí odkaz:
http://arxiv.org/abs/1608.01528
Autor:
Oreshkov, Ognyan, Giarmatzi, Christina
Publikováno v:
New J. Phys. 18, 093020 (2016)
We develop rigorous notions of causality and causal separability in the process framework introduced in [Oreshkov, Costa, Brukner, Nat. Commun. 3, 1092 (2012)], which describes correlations between separate local experiments without a prior assumptio
Externí odkaz:
http://arxiv.org/abs/1506.05449
Autor:
Araújo, Mateus, Branciard, Cyril, Costa, Fabio, Feix, Adrien, Giarmatzi, Christina, Brukner, Časlav
Publikováno v:
New J. Phys. 17 (2015) 102001
Our common understanding of the physical world deeply relies on the notion that events are ordered with respect to some time parameter, with past events serving as causes for future ones. Nonetheless, it was recently found that it is possible to form
Externí odkaz:
http://arxiv.org/abs/1506.03776