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Research news

  • Steering is an essential feature of non-locality in quantum theory 2018-10-15 A physical theory is called non-local when observers can produce instantaneous effects over distant systems. Non-local theories rely on two fundamental effects: local uncertainty relations and steering of physical states at a distance. In quantum mechanics, the former one dominates the other in non-local games. A new study proved that the entanglement-based steering also plays an important role.
  • A schematic showing the band spectrum for a non-Hermitian Chern insulator, which is insulating in the bulk but supports chiral, electronic states on its edges. The gray spectrum corresponds to the eigenvalues of the Hamiltonian with periodic boundary conditions, while the blue corresponds to the eigenvalues of the Hamiltonian on a cylinder. The red corresponds to the chiral, edge state. Strikingly, the spectrum of the system with periodic boundary conditions is vastly different from the spectrum with open boundary conditions. Using the biorthogonal properties of the open system, however, the new theory can accurately predict when it attaches to the bulk spectrum, indicated by the orange and green dashed lines. Topology of non-Hermitian systems unraveled 2018-10-02 The study of topological materials has been an important task in condensed matter physics over the past few decades and was the subject of the 2016 Nobel prize in physics. Recent experiments and theoretical works have shown that unexpected phenomena occur in many open, non-equilibrium and complex systems that can be described using non-Hermitian physics.

16 profile research areas at Stockholm University

Stockholm University is a prominent research university characterised by its independent basic research. The university has identified 16 profile areas within the broad research spectrum. The research within three out of these profile areas is performed at the Department of Physics.

Astrophysics, Cosmology and Particle Physics Profile Area

Astrophysics, Cosmology and Particle Physics

From the smallest building blocks of the universe to how galaxies form and evolve over billions of years

Den dubbla elektrostatiska lagringsringen DESIREE vid Fysikum

Atomic and Chemical Physics

This profile area spans many fields, from studies of single isolated atoms to fundamental molecular processes in bulk water.

Mathematical models

Mathematical Theory Development and Modelling

The mathematical equations that describe matter and its interactions at the fundamental level
 

Contacts

Sven Mannervik
Head of the Department of Physics

Tel: 08 5537 8650
e-mail: mannervi@fysik.su.se

Research Divisions

AtomicPhysics_puff-227.jpg
Chemical physics division
Condensed Matter and Quantum Optics
Cosmology, Particle Astrophysics and Strings
Elementary Particle Physics
Instrumentaton Physics
Medical Radiation- Puff