12 papers
Quantum error-correcting codes from aperiodic monotiles: the Hat and the Spectre
Josep Batle, Adam Bednorz
Li and Boyle showed that the Penrose tiling defines a quantum error-correcting code: superpositions of tilings over isometry orbits protect quantum information against erasure of a…
Testing time order and Leggett-Garg inequalities with noninvasive measurements on public quantum computers
Tomasz Rybotycki, Tomasz BiaÅecki, Josep Batle +4
We demonstrate the first violation of the Leggett-Garg inequality and time-order noninvariance on public quantum computers using genuine noninvasive measurements. By gathering suff…
Device-independent prepare-and-prepare bipartite null witness dimension test with a single joint measurement
Josep Batle, Tomasz BiaÅecki, Tomasz Rybotycki +1
We propose a device-independent null witness dimensionality test with bipartite measurements and input from two separate parties. The dimension is determined from the rank of the m…
Cross-platform certification of the qubit space with a minimal number of parameters
Tomasz Rybotycki, Tomasz BiaÅecki, 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…
Stable High-Order Vortices in Spin-Orbit-Coupled Spin-1 Bose-Einstein Condensates
Xin-Feng Zhang, Huan-Bo Luo, Josep Batle +2
The present contribution explores phase transitions that occur in the ground state (GS) of spin-1 Bose-Einstein condensates (BECs) with spin-orbit coupling (SOC) under the action o…
Closing objectivity loophole in Bell tests on a public quantum computer
Adam Bednorz, Josep Batle, Tomasz BiaÅecki +1
We have constructed and run a Bell test of local realism focusing on the objectivity criterion. The objectivity means that the outcomes are confirmed macroscopically by a few obser…