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28 papers · 2 filters
Massive Unruh particles cannot be directly observed
Filip Kiałka, Alexander R. H. Smith, Mehdi Ahmadi +1
We show that massive particles created in a relativistically accelerated reference frame, as predicted by the Unruh effect, can only be found in a tiny layer above the event horizo…
Certification of high-dimensional entanglement and Einstein-Podolsky-Rosen steering with cold atomic quantum memory
Michał Dąbrowski, Mateusz Mazelanik, Michał Parniak +3
The advent of structured, high-dimensional entangled states brings new possibilities for quantum imaging, information processing and quantum key distribution. We experimentally gen…
Bell inequality, Einstein-Podolsky-Rosen steering and quantum metrology with spinor Bose-Einstein condensates
T. Wasak, J. Chwedenczuk
We propose an experiment, where the Bell inequality is violated in a many-body system of massive particles. The source of correlated atoms is a spinor Bose-Einstein condensat…
Bipartite unitary gates and billiard dynamics in the Weyl chamber
Antonio Mandarino, Tomasz Linowski, Karol Życzkowski
Long time behavior of a unitary quantum gate , acting sequentially on two subsystems of dimension each, is investigated. We derive an expression describing an arbitrary iter…
Fundamental limits to frequency estimation: A comprehensive microscopic perspective
Jan F. Haase, Andrea Smirne, Jan Kołodyński +2
We consider a scenario in which qubit-like probes are used to sense an external field that linearly affects their energy splitting. Following the frequency estimation approach in w…
Visibility-based hypothesis testing using higher-order optical interference
Michał Jachura, Marcin Jarzyna, Michał Lipka +2
Many quantum information protocols rely on optical interference to compare datasets with efficiency or security unattainable by classical means. Standard implementations exploit fi…