66 citations · 172 across the 9 of their papers we have counts for
9 papers
The time-energy certainty relation
Zbyszek P. Karkuszewski
All energy measurements of a quantum system are prone to inaccuracies. In particular, if such measurements are carried over a finite period of time the accuracy of the result is af…
A single measurement of a quantum many-body system of bosons
Zbyszek P. Karkuszewski
Here I propose an approximate way of simulating the outcomes of a single-experiment density measurement that is performed on a state of N bosons. The approximation is accurate if o…
Spectral analysis of short time signals
Zbyszek P. Karkuszewski
The very old problem of extracting frequencies from time signals is addressed in the case of signals that are very short as compared to their intrinsic time scales. The solution of…
Harmonic inversion helps to beat time-energy uncertainty relations
Zbyszek P. Karkuszewski
It is impossible to obtain accurate frequencies from time signals of a very short duration. This is a common believe among contemporary physicists. Here I present a practical way o…
Images of the Dark Soliton in a Depleted Condensate
Jacek Dziarmaga, Zbyszek P. Karkuszewski, Krzysztof Sacha
The dark soliton created in a Bose-Einstein condensate becomes grey in course of time evolution because its notch fills up with depleted atoms. This is the result of quantum mechan…
Quantum Depletion of an Excited Condensate
Jacek Dziarmaga, Zbyszek P. Karkuszewski, Krzysztof Sacha
We analyze greying of the dark soliton in a Bose-Einstein condensate in the limit of weak interaction between atoms. The condensate initially prepared in the excited dark soliton s…