Controlled insertion ofone andtwoatomsinto a high-finesse optical cavity
Wolfgang Alt, Tobias Kampschulte, Mkrtych Khudaverdyan, Sebastian Reick, Ariane Stiebeiner, Institutfur Physik, Johannes Gutenberg-Universitdt · 2006
Entangled quantum states haveapplications asamodelsystem forstrongly correlated manybodystates, asresource forquantum information processing andasatool forenhanced precision measurements. Deterministic entanglement schemes create thedesired state bytransferring thesystem under theaction ofacarefully chosen Hamiltonian into an entangled state. Thesystem mustfollow a unitary evolution, anduncontrolled parasitic interactions withthe environment leading tospontaneous decay orpartial measurements ofthestate havetobeavoided. Entangled states canalsobecreated inaprobabilistic manner: By performing asuitable partial measurement ofthesystem's state, the probe measurement outcomeindicates whether thesystemhasbeen laser projected into thedesired state ornotbythemeasurement's backaction. Suchprobabilistic schemescan relaxthestringent requirements onthesuppression ofdissipation inourcavity-QED system [1,2]. cavity Inourexperiment, we loada chosen numberofdoppler-cooled mirror