Temporal distinguishability in Hong-Ou-Mandel interference for harnessing high-dimensional frequency entanglement
Abstract
High-dimensional quantum entanglement is currently one of the most prolific fields in quantum information processing due to its high information capacity and error resilience. A versatile method for harnessing high-dimensional entanglement has long been hailed as an absolute necessity in the exploration of quantum science and technologies. Here we exploit Hong-Ou-Mandel interference to manipulate discrete frequency entanglement in arbitrary-dimensional Hilbert space. The generation and characterization of two-, four- and six-dimensional frequency entangled qudits are theoretically and experimentally investigated, allowing for the estimation of entanglement dimensionality in the whole state space. Additionally, our strategy can be generalized to engineer higher-dimensional entanglement in other photonic degrees of freedom. Our results may provide a more comprehensive understanding of frequency shaping and interference phenomena, and pave the way to more complex high-dimensional quantum information processing protocols.
- Publication:
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npj Quantum Information
- Pub Date:
- 2021
- DOI:
- 10.1038/s41534-021-00504-0
- arXiv:
- arXiv:2010.03335
- Bibcode:
- 2021npjQI...7..167C
- Keywords:
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- Quantum Physics
- E-Print:
- npj Quantum Information 7, 67 (2021)