21.15109/CONCORDA/9V5CHWDombi, AndrásAndrásDombi0000-0003-2158-0609Wigner Research Centre for PhysicsClark, Thomas WilliamThomas WilliamClarkWigner Research Centre for PhysicsWilliams, Francis Ian BickfordFrancis Ian BickfordWilliamsWigner Research Centre for PhysicsJessen, FlorianFlorianJessenEberhard Karls Universität TübingenFortágh, JózsefJózsefFortághEberhard Karls Universität TübingenNagy, DávidDávidNagyWigner Research Centre for PhysicsVukics, AndrásAndrásVukicsWigner Research Centre for PhysicsDomokos, PéterPéterDomokosWigner Research Centre for PhysicsARP2023Physicsquantum opticscavity QEDself-trappingmany-body physicscold atomsCurko, ArpadWigner Research Centre for Physics2023-10-102023-10-1110.1088/1367-2630/ac1a3c136737413671367591947143854936680001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128800012880001288000128text/plaintext/plaintext/plaintext/plaintext/plaintext/plaintext/plaintext/plaintext/plainapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication/octet-streamapplication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BY 4.0We study experimentally the optical dipole trapping of a cloud of cold atoms in a high-finesse cavity in the parameter regime where the atomic back-action on the cavity mode is significant. Back-action based effects lead to state selective optical manipulation schemes. We identify a parameter range where the collective back action of the atoms is needed for the trapping, i.e. a single atom would not be trapped under the same laser drive conditions. The collective self-trapping is demonstrated by the observation of a significant increase of the trapping time as a function of the atom number. The atomic back action on the cavity field gives rise to a simultaneous real-time monitoring of the number of trapped atoms. This is used to show a non-exponential collapse of the atom trap.National Research, Development and Innovation Office of Hungary (NKFIH)2017-1.2.1-NKP-2017-00001