Method for the Direct Generation of Multidimensional Biphoton States with Polarization–Frequency Quantum Entanglement
Maksim A. Smirnov, A. M. Smirnova, O. A. Ermishev, K. S. Melnik, Sergey A. Moiseev · Journal of Experimental and Theoretical Physics Letters · 2025
An approach has been proposed to directly generate a multidimensional biphoton state that combines the polarization and frequency quantum entanglement of visible and infrared modes in a microstructured fiber. The possibility of controlling polarization states and equalizing the amplitudes of all generated spectral modes without a significant decrease in the generation rate has been shown. The prospects for the use of multidimensional biphoton states in optical quantum processing and quantum communications have been discussed.