Coherent quantum dynamics of systems with coupling-induced creation pathways

Temporally Asymmetric Biphoton States in Cavity-Enhanced Optical Parametric Processes

“…Figure 2(b) plots the signal forward -idler backward configuration where the oscillatory features are complimentary to Fig. 2(a) creating time-evolving pathencoded states of the two photons[16]. The coincidence flux in the remaining two configurations (Fig.2(c), (d)) is considerably low compared to the configurations where the signal is detected in the forward direction indicating that most of the bi-photons are generated in the forward direction as expected.…”

“…On the other hand, for coincidences at τ > 0, the idler photon is detected first, and since the scattering rate of the signal is small, it has a high probability to exit the cavity in the forward direction and there are no oscillations in this part of the coherence function. [16]. The coincidence flux in the remaining two configurations (Fig.…”

“…One of the most efficient methods of generating quantum states of light is based on optical parametric processes such as spontaneous parametric down conversion (SPDC) and spontaneous four wave mixing (SFWM). These sources generate time-energy entangled photon pairs and have been demonstrated to also produce entanglement in discrete variables such as polarization and path [14][15][16], spatial mode [17,18] , time and frequency bins [19,20] etc. Efforts have been made to engineer the continuous variable time-frequency entanglement that emerges from these processes, for example, by manipulating pump properties, engineering dispersion of the nonlinear medium to obtain exotic phase matching conditions or by time or frequency domain post-processing of the generated photons [21][22][23][24][25][26][27][28][29].…”