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Press releases

The Faculty of Physics of the University of Warsaw will educate staff for the Polish nuclear sector

2022-04-29

Leading Polish universities – University of Warsaw and the Warsaw University of Technology in the presence of H.E. Frédéric Billet, Ambassador of France to Poland, have signed an agreement with France’s International Institute for Nuclear Energy (I2EN). | More

Physicists from the University of Warsaw co-created a microlaser emitting two circular beams

2022-03-23

Scientists from the University of Warsaw, the Military University of Technology and the University of Southampton presented a new type of tunable microlaser emitting two beams. – These beams are polarized circularly and directed at different angles – says Prof. Jacek Szczytko from the Faculty of Physics of the University of Warsaw. This achievement was obtained by creating the so-called a persistent-spin helix on the surface of the microcavity. The results have been published in "Physical Review Applied". | More

Colossal Black Holes Locked in Dance at Heart of Galaxy

2022-02-23

An international team of astronomers found evidence for a unique pair of supermassive black holes orbiting each other in the center of a quasar. Dr Przemysław Mróz from the Astronomical Observatory of the University of Warsaw is one of the co-authors of the study published in The Astrophysical Journal Letters. | More

A useful application for a quantum processor: the improvement of spectroscopy measurements

2022-02-11

Researchers from the University of Warsaw have built the first quantum processor in Poland and are putting it to use in spectroscopy. They’ve demonstrated how quantum information processing can efficiently provide information on matter hidden in light.
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Publication of physicists from the University of Warsaw in "Nature"

2021-12-15

Scientists from the Faculty of Physics at the University of Warsaw led by dr hab. Michał Tomza together with the experimental group of prof. Tobias Schaetz from the University of Freiburg were the first to observe Feshbach resonances between a single ion and ultracold atoms. The results of their work have been published in "Nature". The article was additionally highlighted on the journal's cover. | More

The optical Stern-Gerlach Deflection and Young’s experiment in the reciprocal space

2021-11-09

Scientists for the first time demonstrated Young's experiment for photons in the reciprocal space. Spin patterns corresponding to the persistent spin helix and the Stern-Gerlach experiment are realized in an optically anisotropic liquid crystal microcavity. By applying electric voltage across the microcavity, the liquid crystal molecules inside could be rotated in such a way that the light passing through the cavity was forced to change its internal state into right- and left-handed circular polarized components. | More

Lasing as a tool for detection of protein aggregates

2021-10-06

Scientists from the Laboratory of Ultrafast Processes at the Faculty of Physics of the University of Warsaw have developed a method that allows to detect small protein aggregates (oligomers), the presence of which in the nervous tissue and the cerebrospinal fluid may signal the early stages of neurodegenerative diseases such as the Alzheimer's or Parkinson's diseases. The method is based on the use of the phenomenon of stimulated emission to amplify the light emitted spontaneously by dye molecules associated with protein aggregates. A paper describing this research is promoted on the main cover of the September issue of ACS Photonics. | More

Non-linear effects in coupled optical microcavities

2021-07-28

Scientists from the Faculty of Physics of the University of Warsaw demonstrated exciton-polariton lasing and parametric scattering of exciton-polaritons in a system of coupled optical microcavities. The results have been published in the prestigious journal "Nanophotonics". Exciton-polaritons are quasiparticles formed by a strong coupling between excitons and photons in a semiconductor. Their bosonic nature and non-linear interactions allow the observation of fascinating phenomena such as Bose-Einstein condensation of polaritons and polariton lasing, which, unlike typical lasering, occurs without occupation inversion. | More

Emulsion microdroplets can swim by producing their own flagella

2021-07-15

Researchers from the Faculty of Physics at the University of Warsaw, University of Cambridge, Queen Mary University of London and University of Sofia have shown that slow cooling of a suspension of oil droplets with surfactant in water may lead to non-spherical shapes of the droplets, which can produce filamentous structures resembling bacterial flagella. The filaments induce motion of the droplets, and the process is fully reversible via cyclic changes of the temperature of their environment. An article describing the findings has just been published in “Nature Physics”. | More

Lasing in biological materials as a structure-sensitive research tool

2021-06-22

A team of scientists from the Ultrafast Processes Laboratory at the Faculty of Physics of the University of Warsaw, supported by a researcher from the Chalmers University of Technology (Sweden), showed how to detect changes in the DNA structure using all-optical methods based on the emission of light. This was achieved by time-resolved measurements of the intensity of light emitted by an organic dye bound to the studied material after it was excited by a short pulse of laser light and by using the phenomenon of light amplification in a medium excited by a strong laser pulse. A paper describing these experiments found its way to the cover of one of the leading magazines in the field of physical chemistry, The Journal of Physical Chemistry Letters. | More

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