Entanglement, energy transfer and coherence visibility in small molecular systems

Abstract

We study the dynamical entanglement of vibrations, intramolecular energy transfer and coherence properties in triatomic molecular systems based on discrete self-trapping theory. O 3 and SO 2 samples are employed as typical local-mode (LM) and normal-mode molecules, respectively. It is demonstrated that the LM molecule prepared in a LM characteristic state is much more suitable to realize quantum computation. In addition, by introducing a section of entanglement and energy transfer, we investigate the relationship between the two quantities generally. The dynamics between entanglement and energy transfer can reveal a good synchronism under some conditions. Moreover, the intramolecular coherence properties presented by the coherence visibility are discussed in some cases.

Nano‐Cavity QED with Tunable Nano‐Tip Interaction

“…This increases experimental flexibility enabling, for example, measurement of anticrossing curves through addressing different emitters with intrinsically varying cavity detuning δ instead of changing fundamental experimental parameters like laser power or temperature that can impact the underlying system properties . One can envision a broad range of new experiments based on this flexibility, such as TESC imaging in 2D Van der Waals materials, the investigation of randomly located single photon emitting defects in solid state systems that are difficult to probe with stationary plasmonic cavities despite their exceptional properties for quantum information and technology, and coupling of multiple single emitters for entanglement and superradiance . While room temperature strong coupling is feasible in nano‐plasmonic cavities, it has been assumed that the strong dissipation and dephasing introduced by the thermal vibrational reservoir at these temperatures would make them inaccessible to technologies that require quantum coherence and control of single emitter‐photon states.…”