Journal
PHYSICAL REVIEW LETTERS
Volume 120, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.213601
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [Sonderforschungsbereich TRR 142]
- Gottfried Wilhelm Leibniz-Preis
- European Unions (EU) Horizon Research and Innovation program [665148]
- Natural Sciences and Engineering Resource Council of Canada (NSERC)
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High-dimensional quantum information processing promises capabilities beyond the current state of the art, but addressing individual information-carrying modes presents a significant experimental challenge. Here we demonstrate effective high-dimensional operations in the time-frequency domain of nonclassical light. We generate heralded photons with tailored temporal-mode structures through the pulse shaping of a broadband parametric down-conversion pump. We then implement a quantum pulse gate, enabled by dispersion-engineered sum-frequency generation, to project onto programmable temporal modes, reconstructing the quantum state in seven dimensions. We also manipulate the time-frequency structure by selectively removing temporal modes, explicitly demonstrating the effectiveness of engineered nonlinear processes for the mode-selective manipulation of quantum states.
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