Compared with biphotons, the three‐body photons have a more plentiful energy construction. Further, excellent properties such as entangled multiqubit states, high security, flexibility, and information capacity are observed as the increased number of photons is manipulated, in turn increasing the need for a multiple‐body quantum information process. Here, a novel method is proposed to generate natural narrowband three‐body photons of W state, entangled in time (or energy) via a single step of six‐wave mixing process (SWMP). Emphasizing on the linear and nonlinear susceptibilities of the SWMP, the properties of temporal correlation of the generated triphoton in the photon coincidence counting measurements are studied. Based on the photon–atom interfaces, these susceptibilities compete or coexist with each other. Meanwhile, in a dressed‐state picture, the nonlinear susceptibility decides the temporal correlation of the triphoton wave packet as damped multiperiodic Rabi oscillation, suggesting the property of the high‐dimensional time−energy entangled triphoton state. Moreover, combining the topology energy level constructions with the optical responses is a significant method for investigating the peculiarity in the temporal correlation of the generated three‐body photons.
The competition and coexistence between linear and nonlinear multiphoton optical responses in multidressing fields; these exhibit shaping temporal waveforms is investigated. In the group delay regime, the width of the rectangular profile in double‐dressing fields is reduced compared to that of the single‐dressing field. In the Rabi oscillation regime, the number of periods in double‐dressing fields increases relative to the single‐dressing field, and the tri‐ and quadphotons are observed to feature six and nine coherent channels, respectively. Finally, changing the optical depth and power of the dressing field can alter the optical response. Compared with the single‐dressing field, cascaded and nested double‐dressing fields reduce the linear coherence time and increase the number of periods; this is useful for photon storage and long‐distance communication. Moreover, increasing the number of dressing coherent channels increases the high‐dimensional entangled information capacity, which is more conducive to the realization of quantum communication and quantum networks.
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