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

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

URL: http://arxiv.org/abs/2310.20694v1
Date: Tue, 31 Oct 2023 17:55:36 GMT
Title: Experimental high-dimensional entanglement certification and quantum steering with time-energy measurements
Authors: Kai-Chi Chang, Murat Can Sarihan, Xiang Cheng, Paul Erker, Andrew Mueller, Maria Spiropulu, Matthew D. Shaw, Boris Korzh, Marcus Huber, and Chee Wei Wong
Abstract summary: Time-frequency qudit states offer significantly increased quantum capacities while keeping the number of photons constant. We develop a new scheme and experimentally demonstrate the certification of 24-dimensional entanglement and a 9-dimensional quantum steering. Our highly scalable scheme is based on commercial telecommunication optical fiber components and recently developed low-jitter high-efficiency single-photon detectors.
Score: 4.573407244528267
License: http://creativecommons.org/licenses/by/4.0/
Abstract: 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 highly scalable scheme is based on commercial telecommunication optical fiber components and recently developed low-jitter high-efficiency single-photon detectors, thus opening new pathways towards advanced large-scale quantum information processing and high-performance, noise-tolerant quantum communications with time-energy measurements

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