22 citations · 22 across the 2 of their papers we have counts for
5 papers
Harnessing the center-of-mass excitations in quantum metrology
Karol Gietka
In quantum metrology, one typically creates correlations among atoms or photons to enhance measurement precision. Here, we show how one can use other excitations to perform quantum…
Inverted harmonic oscillator dynamics of the nonequilibrium phase transition in the Dicke model
Karol Gietka, Thomas Busch
We show how the dynamics of the Dicke model after a quench from the ground-state configuration of the normal phase into the superradiant phase can be described for a limited time b…
Adiabatic critical quantum metrology cannot reach the Heisenberg limit even when shortcuts to adiabaticity are applied
Karol Gietka, Friederike Metz, Tim Keller +1
We show that the quantum Fisher information attained in an adiabatic approach to critical quantum metrology cannot lead to the Heisenberg limit of precision and therefore regular q…
Multipartite-Entanglement Dynamics in Regular-to-Ergodic Transition: a Quantum-Fisher-Information approach
Karol Gietka, Jan Chwedeńczuk, Tomasz Wasak +1
The characterization of entanglement is a central problem for the study of quantum many-body dynamics. Here, we propose the quantum Fisher information as a useful tool for the stud…
A supersolid-based gravimeter in a ring cavity
Karol Gietka, Farokh Mivehvar, Helmut Ritsch
We propose a novel type of composite light-matter interferometer based on a supersolid-like phase of a driven Bose-Einstein condensate coupled to a pair of degenerate counterpropag…