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- National Quantum Information Centre in GdanskPL167 papers
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76 papers · 1 filter
Algorithmic approach to Cosmological Coherent State Expectation Values in LQG
Klaus Liegener, Łukasz Rudnicki
In the lattice approach to Loop Quantum Gravity on a fixed graph computations tend to be involved and are rarely analytically manageable. But, when interested in the expectation va…
Detection power of separability criteria based on a correlation tensor: a case study
Gniewomir Sarbicki, Giovanni Scala, Dariusz Chruściński
Detection power of separability criteria based on a correlation tensor is tested within a family of generalized isotropic state in . For all these c…
Eternally non-Markovian dynamics of a qubit interacting with a single-photon wavepacket
Anita Dąbrowska, Dariusz Chruściński, Sagnik Chakraborty +1
An evolution of a two-level system (qubit) interacting with a single-photon wave packet is analyzed. It is shown that a hierarchy of master equations gives rise to phase covariant…
Quantum information in Hawking radiation
Erik Aurell, Michał Eckstein, Paweł Horodecki
In 1974 Steven Hawking showed that black holes emit thermal radiation, which eventually causes them to evaporate. The problem of the fate of information in this process is known as…
Simultaneous estimation of multiple phases in generalised Mach-Zehnder interferometer
Marcin Markiewicz, Mahasweta Pandit, Wieslaw Laskowski
In this work we investigate the problem of simultaneous estimation of phases using generalised three- and four-mode Mach-Zehnder interferometer. In our setup, we assume that the ph…
On safe post-selection for Bell tests with ideal detectors: Causal diagram approach
Pawel Blasiak, Ewa Borsuk, Marcin Markiewicz
Reasoning about Bell nonlocality from the correlations observed in post-selected data is always a matter of concern. This is because conditioning on the outcomes is a source of non…