1.7k citations · 5.2k across the 66 of their papers we have counts for
8 papers · 1 filter
Fragile single-cone Dirac quantum walks in two dimensions
C. W. J. Beenakker, J. Sánchez Férnan, J. Tworzydło
It is known that a one-dimensional (1D) quantum walk gives a local space-time discretization of the massless Dirac equation with a single quasi-energy cone (no fermion doubling at…
Efficient discrimination between real and complex quantum theories
Josep Batle, Tomasz Białecki, Tomasz Rybotycki +2
We improve the test to show the impossibility of a quantum theory based on real numbers by a larger ratio of complex-to-real bound on a Bell-type parameter. In contrast to previous…
Cross-platform certification of the qubit space with a minimal number of parameters
Tomasz Rybotycki, Tomasz Białecki, Josep Batle +2
We demonstrate a determinant dimension witness of a qubit space. Our test has a minimal number of independent parameters. We achieve it by mapping the Bloch sphere -rotation a…
Quantum null-hypothesis device-independent Schmidt rank witness
Josep Batle, Tomasz Białecki, Tomasz Rybotycki +2
We investigate the dimensionality of bipartite quantum systems by construction of a device-independent null witness test. This test assesses whether a given bipartite state conform…
Precise certification of a qubit space
Tomasz Białecki, Tomasz Rybotycki, Josep Batle +2
We demonstrate an implementation of the precise test of dimension on the qubit, using the public IBM quantum computer, using the determinant dimension witness. The accuracy is belo…
Testing accuracy of qubit rotations on a public quantum computer
Tomasz Białecki, Tomasz Rybotycki, Jakub Tworzydło +1
We analyze the results of the test of qubit rotations on the public quantum computer provided by IBM. We measure a single qubit rotated by about a random axis, and we a…
Scattering theory of plasmon-assisted entanglement transfer and distillation
J. L. van Velsen, J. Tworzydlo, C. W. J. Beenakker
We analyse the quantum mechanical limits to the plasmon-assisted entanglement transfer observed by E. Altewischer, M.P. van Exter, and J.P. Woerdman [Nature, 418, 304 (2002)]. The…
Quantum-optical communication rates through an amplifying random medium
J. Tworzydlo, C. W. J. Beenakker
We study the competing effects of stimulated and spontaneous emission on the information capacity of an amplifying disordered waveguide. At the laser threshold the capacity reaches…