Time-Spatial Mode Selective Quantum Frequency Converter
Santosh Kumar, He Zhang, Prajnesh Kumar, Malvika Garikapati, Yong Meng, Sua, and Yu-Ping Huang
TL;DR
This paper demonstrates a high-extinction, mode-selective quantum frequency converter that operates over combined spatial and temporal modes, enhancing quantum state tomography and quantum communication efficiency.
Contribution
It introduces a novel method for mode-selective frequency conversion using a modulated, delayed pump with adaptive feedback, achieving significant extinction in high-dimensional quantum states.
Findings
Achieved up to 30 dB extinction in mode selectivity.
Demonstrated simultaneous high-dimensional operations in space and time.
Enhanced quantum state tomography and quantum communication potential.
Abstract
We experimentally demonstrate a mode-selective quantum frequency converter over a compound spatio-temporal Hilbert space. We show that our method can achieve high-extinction for high-dimensional quantum state tomography by selectively upconverting the signal modes with a modulated and delayed pump. By preparing the pump in optimized modes through adaptive feedback control, selective frequency conversion is demonstrated with up to 30 dB extinction. The simultaneous operations over high-dimensional degrees of freedom in both spatial and temporal domains can serve as a viable resource for photon-efficient quantum communications and computation.
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