Experimental high-dimensional entanglement certification and quantum steering with time-energy measurements

High-dimensional entanglement provides unique ways of transcending the limitations of current approaches in quantum information processing, quantum communications based on qubits. The generation of time-frequency qudit states offer significantly increased quantum capacities while keeping the number...

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Bibliographic Details
Published in:arXiv.org 2024-11
Main Authors: Kai-Chi, Chang, Murat Can Sarihan, Cheng, Xiang, Erker, Paul, Hong Li, Nicky Kai, Mueller, Andrew, Spiropulu, Maria, Shaw, Matthew D, Korzh, Boris, Huber, Marcus, Chee Wei Wong
Format: Article
Language:English
Subjects:
Certification
Data processing
Dispersion
Information processing
Optical fibers
Photons
Quantum entanglement
Quantum phenomena
Qubits (quantum computing)
Steering
Time measurement
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Summary:High-dimensional entanglement provides unique ways of transcending the limitations of current approaches in quantum information processing, quantum communications based on qubits. The generation of time-frequency qudit states offer significantly increased quantum capacities while keeping the number of photons constant, but pose significant challenges regarding the possible measurements for certification of entanglement. Here, we develop a new scheme and experimentally demonstrate the certification of 24-dimensional entanglement and a 9-dimensional quantum steering. We then subject our photon-pairs to dispersion conditions equivalent to the transmission through 600-km of fiber and still certify 21-dimensional entanglement. Furthermore, we use a steering inequality to prove 7-dimensional entanglement in a semi-device independent manner, proving that large chromatic dispersion is not an obstacle in distributing and certifying high-dimensional entanglement and quantum steering. Our approach, leveraging intrinsic large-alphabet nature of telecom-band photons, enables scalable, commercially viable, and field-deployable entangled and steerable quantum sources, providing a pathway towards fully scalable quantum information processer and high-dimensional quantum communication networks.
ISSN:2331-8422