Preserving photon statistics of quantum optical states throughout frequency conversion is vital in trendy quantum applied sciences, as quantum networks generally demand the interfacing of many subsystems working in considerably totally different spectral areas. Nevertheless, present approaches supply solely very small frequency shifts and restricted tunability. In addition they undergo from excessive insertion loss and Raman noise originating within the supplies used.
In a brand new research, scientists reported a breakthrough in frequency up-conversion of single photons primarily based on a hollow-core photonic crystal fiber (PCF) stuffed with hydrogen fuel. Scientists created a spatio-temporal hologram of molecular vibrations within the fuel by stimulating Raman scattering. They then used this hologram for extremely environment friendly, correlation-preserving frequency conversion of single photons.
The system operates at a pressure-tunable wavelength, which could possibly be useful in quantum communications the place environment friendly sources of indistinguishable single-photons are unavailable at wavelengths suitable with present fiber networks.
The strategy combines quantum optics, gas-based nonlinear optics, hollow-core PCF, and the physics of molecular vibrations to kind an environment friendly software that may function in any spectral band from the ultraviolet to the mid-infrared – an ultra-broad working vary inaccessible to the present applied sciences. The findings could also be used to develop fiber-based instruments in quantum communications and quantum-enhanced imaging applied sciences.
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