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12 papers · 2 filters
States that are far from being stabilizer states
David Andersson, Ingemar Bengtsson, Kate Blanchfield +1
Stabilizer states are eigenvectors of maximal commuting sets of operators in a finite Heisenberg group. States that are far from being stabilizer states include magic states in qua…
Geometric uncertainty relation for quantum ensembles
Hoshang Heydari, Ole Andersson
Geometrical structures of quantum mechanics provide us with new insightful results about the nature of quantum theory. In this work we consider mixed quantum states represented by…
Landau-like states in neutral particles
Saikat Banerjee, Hans Ågren, Alexander V. Balatsky
We show the emergence of a new type of dispersion relation for neutral atoms with an interesting similarity with the spectrum of 2-dimensional electrons in an applied perpendicular…
Hacking energy-time entanglement-based systems with classical light
Jonathan Jogenfors, Ashraf M. Elhassan, Johan Ahrens +2
Photonic systems based on energy-time entanglement have been proposed to test local realism using the Bell inequality. A violation of this inequality normally also certifies securi…
A Symmetry Approach to Geometric Phase for Quantum Ensembles
Ole Andersson, Hoshang Heydari
We use tools from the theory of dynamical systems with symmetries to stratify Uhlmann's standard purification bundle and derive a new connection for mixed quantum states. For unita…
Nonlocal correlations in the star-network configuration
Armin Tavakoli, Paul Skrzypczyk, Daniel Cavalcanti +1
The concept of bilocality was introduced to study the correlations which arise in an entanglement swapping scenario, where one has two sources which can naturally taken to be indep…