"Entanglement and decoherence of ultracold gases"
financed by National Science Center in frame of the competition SONATA 7Project  main idea
The topic is on the border between Quantum Information and physics of ultracold gases. There exist relatively simple conceptually schemes, which use either collisions between atoms or interaction between light and matter, to produce highly entangled atomic state (including even the Schroedinger cat). Unfortunately, always the entangling unitary dynamics is assisted by dissipative procesess, killing the quantum coherence.The aim of the project is to find the limitations of such schemes, including the unavoidable decoherence processes.
Main results
Explicite, realistic conditions to create Schrodinger cat state in ultracold gases.Explicite, realistic conditions to create EinsteinPodolskyRosen correlations in ultracold gas.
New method to stop entanglement dynamics and store the quantum correlations by self trapping.
Thermal entangled states in F=1 spinor condensates.
Publications
2019
M.A. Kristensen, M.B. Christensen, M. Gajdacz, M. Iglicki, K. Pawłowski,
C. Klempt, J.F.Sherson, K. Rzazewski, A.J.Hilliard, J.J.Arlt Observation of Atom Number Fluctuations in a BoseEinstein Condensate Phys. Rev. Lett. arxiv 

T. Hatomura, K. Pawłowski
Superadiabatic generation of cat states in bosonic Josephson junctions under particle losses Phys. Rev. A arxiv 
2018
R. Oldziejewski, W. Gorecki K. Pawłowski, K. Rzazewski
Manybody solitonlike states of bosonic ideal gas PRA 97, 063617 (2018) in Kalejdoscope of PRA, arxiv 

R. Oldziejewski, W. Gorecki K. Pawłowski, K. Rzazewski
Roton in a fewbody dipolar system NJP 20, 123006 (2018) arxiv 

D. Kajtoch, K. Pawłowski, E. Witkowska
Metrologically useful states of spin1 Bose condensates with macroscopic magnetization PRA 97, 023616 (2018) arxiv 
2017
K. Szymanski, K. Pawłowski
Evolution of entanglement under an Isinglike Hamiltonian with particle losses PRA 96, 062312 (2017) arxiv 

H. Kurkjian, K. Pawłowski, A. Sinatra
EPRentangled BoseEinstein condensates in statedependent potentials: a dynamical study PRA 96, 013621 (2017) hal, 

K. Pawłowski, M. Fadel, P, Treutlein, Y. Castin, A. Sinatra
Mesoscopic quantum superpositions in bimodal BoseEinstein condensates: decoherence and strategies to counteract it PRA 95, 063609 (2017) in Kalejdoscope of PRA, hal, arxiv 

K. Pawłowski, Ł.A. Turski
On the Dissipative Version of the GrossPitaevski Equation Phys. Lett. A, 381, 1710 (2017) arxiv 
2016
D. Kajtoch, K. Pawłowski, E. Witkowska
Entanglement storage by classcial fixed points in the twoaxis countertwisting model Physical Review A, 93, 022331 (2016) in Kalejdoscope of PRA 