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6 papers · 2 filters
Semi-device-independent bounds on entanglement
Yeong-Cherng Liang, Tamas Vertesi, Nicolas Brunner
Detection and quantification of entanglement in quantum resources are two key steps in the implementation of various quantum-information processing tasks. Here, we show that Bell-t…
Full-revivals in 2-D Quantum Walks
M. Stefanak, B. Kollar, T. Kiss +1
Recurrence of a random walk is described by the Polya number. For quantum walks, recurrence is understood as the return of the walker to the origin, rather than the full-revival of…
Mapping the spatial distribution of entanglement in optical lattices
Emilio Alba, Geza Toth, Juan Jose Garcia-Ripoll
We study the entangled states that can be generated using two species of atoms trapped in independently movable, two-dimensional optical lattices. We show that using two sets of me…
Permutationally invariant quantum tomography
Geza Toth, Witlef Wieczorek, David Gross +3
We present a scalable method for the tomography of large multiqubit quantum registers. It acquires information about the permutationally invariant part of the density operator, whi…
Recurrences in three-state quantum walks on a plane
B. Kollár, M. Štefaňák, T. Kiss +1
We analyze the role of dimensionality in the time evolution of discrete time quantum walks through the example of the three-state walk on a two-dimensional, triangular lattice. We…
The role of self-coherence in correlations of bosons and fermions in linear counting experiments. Notes on the wave-particle duality
Sandor Varro
Correlations of detection events in two detectors are studied in case of linear excitation of the measuring apparatus. On the basis of classical probability theory and fundamental…