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Research news in Condensed Matter and Quantum Optics

Figure 1: A colloidal particle in an optical trap (shown as a red ball), in the presence of thermal noise, can be made to work as a microscopic machine or heat engine. Its fluctuations have some typical features, some of which are shown here. Ref: Phys. Rev. Lett. 122, 140601

Efficiency fluctuations in microscopic machines

Results of a recent study by physicists from Stockholm University in collaboration with researchers at Nordita and the University of Bielefeld, provide a general understanding of the efficiency fluctuations in microscopic machines.

Steering is an essential feature of non-locality in quantum theory 2

Steering is an essential feature of non-locality in quantum theory

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.

non-Hermitian Chern insulator

Topology of non-Hermitian systems unraveled

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.

Ana Predojevic and Markus Hennrich

Two prestigious Quantum Technology grants for Fysikum

Fysikum has been very successful in the highly competitive QuantERA ERA-NET Cofund call in Quantum Technologies. Two proposals coordinated by Ana Predojevic and Markus Hennrich, at Fysikum, Stockholm University have been selected for funding.

From the blog

KOMKO division

Condensed Matter and Quantum Optics division

Head of division

Eddy Ardonne
Room C5:3025
Tel: +46 (0)8 5537 8596
E-mail: ardonne@fysik.su.se