83 citations · 225 across the 15 of their papers we have counts for
3 papers · 2 filters
How confused can an entanglement witness be to be still persuasive
Jan Roik, Karol Bartkiewicz, Antonín Černoch +1
Detection of entangled states is essential in both fundamental and applied quantum physics. However, this task proves to be challenging especially for general quantum states. One c…
Rotation-time symmetry in bosonic systems and the existence of exceptional points in the absence of symmetry
Ewelina Lange, Grzegorz Chimczak, Anna Kowalewska-Kudłaszyk +1
We study symmetries of open bosonic systems in the presence of laser pumping. Non-Hermitian Hamiltonians describing these systems can be parity-time () symmetric in spe…
Experimental diagnostics of entanglement swapping by a collective entanglement test
Vojtěch Trávníček, Karol Bartkiewicz, Antonín Černoch +1
The paper reports on experimental diagnostics of entanglement swapping protocol by means of collective entanglement witness. Our approach is suitable to detect disturbances occurri…