In a recent paper published in Physical Review X, a team of scientists from MPQ in Munich, ICFO in Barcelona, University of Innsbruck and the Center for Theoretical Physics of the Polish Academy of Sciences have proposed a new simple test to study nonlocal correlations in quantum many-body systems. They have studied whether nonlocal correlations appear in natural systems, more precisely, as ground states of some spin Hamiltonians, such as […]
Until quite recently, creating a hologram of a single photon was believed to be impossible due to fundamental laws of physics. However, scientists at the Faculty of Physics, University of Warsaw, have successfully applied concepts of classical holography to the world of quantum phenomena. A new measurement technique has enabled them to register the first-ever hologram of a single light particle, thereby shedding new light on the foundations of quantum […]
Can the passage of time be measured precisely, always and everywhere? The answer will upset many watchmakers. A team of physicists from the universities of Warsaw and Nottingham have just shown that when we are dealing with very large accelerations, no clock will actually be able to show the real passage of time, known as ?proper time?.
Neither quantum computers nor quantum cryptography will become prevalent technologies without memory systems able to manipulate quantum information easily and effectively. The Faculty of Physics at the University of Warsaw has recently made inroads into popularizing quantum information technologies by creating an atomic memory with outstanding parameters and an extremely simple construction.
Squeeze and you shall measure ? squeezed coherent states shown to be optimal for gravitational wave detection
Extremely precise measurements of distances are key in all techniques used to detect gravitational waves. To increase this precision, physicists have started using quantum effects linked with photons. A paper published in „Physical Review A” by Polish and German physicists shows that it is not necessary to use quantum light states more refined than the squeezed coherent states available currently.
Colliding matter waves from a Bose-Einstein condensate violate a relation called the Cauchy-Schwarz inequality, proving that such interactions must be considered quantum mechanically.
The scientists from the Faculty of Physics, University of Warsaw, and the University of Nottingham, have developed theoretical tools making it possible to establish the limits of the precision actually attainable using entangled states under realistic experimental conditions. This has enabled current experimental achievements in the field of precision measurements to be compared, for the first time, against the fundamental limitations of quantum mechanics.