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Quantum Candidate Talk

March 1, 2023 | 4:00 pm - 5:00 pm

Title: Scalable, Ultrafast Quantum Information Processors in Nanophotonics

Abstract: Continuous-variable quantum information processing (CVQIP) through quantum optics offers unprecedented scalability for developing fault-tolerant information processors at room temperature. The critical interest in CVQIP comes primarily from its ability to generate large-scale entangled quantum states, known as cluster states, which serve as a computation substrate for performing measurement-based quantum computation. Cluster states are typically generated from single, or two-mode squeezed vacuum states. Despite significant progress, generating, manipulating, and measuring squeezed states in nanophotonics remains challenging, with performances required for various applications in quantum information science and technology.

Firstly, I will present our approach to overcoming this challenge in the rapidly emerging lithium niobate nanophotonic platform by utilizing ultrashort-pulse phase-sensitive optical parametric amplifiers for the generation and all-optical loss-tolerant measurement of squeezed states on the same chip [1]. Secondly, we discuss hardware-efficient quantum state tomography and quantum state engineering for non-Gaussian resources, which are essential to quantum computational advantages and fault tolerance [2-4]. Finally, I will outline all-optical routes for fault-tolerant universal quantum computing architectures with ultrafast clock speeds, measurement-free quantum communication networks, and quantum-enhanced chip-scale distributed sensors.
[1] R. Nehra et al, Science 377 (6612), 1333-1337 (2022)

[2-4] R. Nehra et al. Optica 6 (10), 1356-1360 (2019); R. Nehra et al. Physical Review Research 2 (4), 042002 (2020);  R. Yanagimoto, R. Nehra, et al., arXiv:2209.01114


March 1, 2023
4:00 pm - 5:00 pm
Event Category:


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2401 Stinson Drive
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