Abstract
We describe a technique for dynamic quantum optical arbitrary-waveform generation and manipulation, which is capable of mode selectively operating on quantum signals without inducing significant loss or decoherence. It is built upon combining the developed tools of quantum frequency conversion and optical arbitrary waveform generation. Considering realistic parameters, we propose and analyze applications such as programmable reshaping of picosecond-scale temporal modes, selective frequency conversion of any one or superposition of those modes, and mode-resolved photon counting. We also report on experimental progress to distinguish two overlapping, orthogonal temporal modes, demonstrating over 8 dB extinction between picosecond-scale time-frequency modes, which agrees well with our theory. Our theoretical and experimental progress, as a whole, points to an enabling optical technique for various applications such as ultradense quantum coding, unity-efficiency cavity-atom quantum memories, and high-speed quantum computing.
Highlights
The past decades have witnessed tremendous advances of interdisciplinary fields via the use of exotic optical technology exploiting the nonclassical features of light waves to achieve performance elusive to their classical counterparts [1]
We describe a technique for dynamic quantum optical arbitrary-waveform generation and manipulation, which is capable of mode selectively operating on quantum signals without inducing significant loss or decoherence
By incorporating quantum frequency conversion with classical optical arbitrary waveform generation, we have demonstrated numerically and experimentally a variety of all-optical tools for manipulating and measuring high-speed quantum signals, ideally without loss or decoherence
Summary
The past decades have witnessed tremendous advances of interdisciplinary fields via the use of exotic optical technology exploiting the nonclassical features of light waves to achieve performance elusive to their classical counterparts [1]. The Green’s functions and their mode structures in Eq (2), are determined by the phase matching property of the waveguide and the pump pulse shapes By manipulating those two, it is possible to tailor both the temporal profiles of the eigenmodes and their coefficients. It is possible to tailor both the temporal profiles of the eigenmodes and their coefficients To this end, it was proposed that single-mode QFC can be achieved by engineering the group velocity of the pump wave to match that of either the signal or the SF wave while making it very different from the other [25, 26, 17]. Implemented with the dynamic OAWG technique described, it can achieve real-time management of the mode profiles and structures This represents a new capability in quantum optics, allowing for, e.g., secure quantum communications in high dimensional Hilbert spaces
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