Subradiant states - as a special kind of entangled states of severel two-level atoms -have recently gained wide attention because these states are exceptional in the sense that they dissipate energy much slower then other collective states. This property implies also that their decoherence is slow, and henceforth they are promising candidates for registers of a quantum computer. Here we propose a scheme which can be used to prepare subradiant states in a cavity. We present perturbative and also exact results showing that after a certain time the evolution of a multiatomic system in a detuned cavity leads to an appropriate entangled state. At this time instant it is sufficient to apply subsequent laser pulses on a control atom in order prepare a state in the subradiant, i.e., a decoherence free subspace.
|Number of pages||6|
|Journal||Fortschritte der Physik|
|Publication status||Published - Dec 1 2001|
ASJC Scopus subject areas
- Physics and Astronomy(all)