134 citations · 174 across the 6 of their papers we have counts for
6 papers · 1 filter
Nine Lorentz covariant bitensors for two Dirac spinors to indicate all entangled states
Markus Johansson
The spinorial degrees of freedom of two spacelike separated Dirac particles are considered and a collection of nine locally Lorentz covariant bitensors is constructed. Four of thes…
Lorentz invariant polynomials as entanglement indicators for Dirac particles
Markus Johansson
The spinorial degrees of freedom of two or more spacelike separated Dirac particles are considered and a method for constructing mixed polynomials that are invariant under the spin…
Comment on 'Reasonable fermionic quantum information theories require relativity'
Markus Johansson
In [N. Friis, New J. Phys. 18, 033014 (2016)] the non-relativistic description of fermions is considered and in particular the role of the parity superselection rule in relation to…
Constructing entanglement measures for fermions
Markus Johansson, Zahra Raissi
In this paper we describe a method for finding polynomial invariants under Stochastic Local Operations and Classical Communication (SLOCC), for a system of delocalized fermions sha…
Robustness of non-adiabatic holonomic gates
Markus Johansson, Erik Sjöqvist, L. Mauritz Andersson +4
The robustness to different sources of error of the scheme for non-adiabatic holonomic gates proposed in [New J. Phys. {\bf 14}, 103035 (2012)] is investigated. Open system effects…
Topological phases and multiqubit entanglement
Markus Johansson, Marie Ericsson, Kuldip Singh +2
Global phase factors of topological origin, resulting from cyclic local evolution, called topological phases, were first described in [Phys. Rev. Lett. {\bf 90}, 230403 (…