Cavity-mediated collective laser-cooling of a non-interacting atomic gas inside an asymmetric trap to very low temperatures

A cavity-mediated collective quantum effect in sonoluminescing bubbles

“…Combined with the ability of optical cavities to spontaneously emit photons and the similarities of the sonoluminescing bubble with the experimental setups used for laser cooling [21,22] and cavity-mediated laser cooling [18,23], the above described interaction suggests that the atomic particles can change their temperature very rapidly, once the cavity approaches its minimum radius. To obtain a more intuitive picture and to show that the result is indeed heating and not cooling, notice that the frequency of the cavity field is relatively small, as long as the bubble radius is relatively large.…”

“…For example, single bubble sonoluminescence experiments with ionic liquids reach significantly higher temperatures than experiments based on noble gas atoms. The purpose of this paper is to emphasise that such a heating mechanism could be based on a recently-identified cavity-mediated collective quantum effect [18]. More details of its relevance in sonoluminescence experiments can be found in Refs.…”

“…Once the plasma is formed, collisions create correlations between the electronic and the vibrational states of the atomic particles which can fuel a cavity-mediated collective quantum optical heating process [19,20]. As in ion trap experiments [22] and in cavity-mediated laser cooling [18,23], the rapid temperature changes of the confined particles are due a complex interplay between electronic and vibrational degrees of freedom combined with the spontaneous emission of photons. If repeated over many cycles, such a mechanism can have a significant effect.…”

The role of quantum coherence in dimer and trimer excitation energy transfer

“…There are different processes where quantum coherence has been shown to enhance the outcome in some aspect, i.e., function as a resource. Examples can be found in quantum thermodynamics [14,15,16,17,18] and photocells [19,20]. A mechanism for which the importance of quantum coherence has been widely discussed and studied over the last years is excitation energy transfer (EET) in photosynthetic complexes.…”