Quantum Advantage in Optical Laser Communications using NISQ-era Quantum Processors

Who: Kaushik P. Seshadreesan, University of Pittsburgh
Friday, December 3, 2021 - 11:00am

A PQI Seminar

Abstract: Optical laser communication forms a cornerstone of modern-day data communications. In the quantum-limited regime of lasercom, where the received optical signal power is small, e.g., in deep-space communications, pre-detection quantum domain collective processing of blocks of received signal pulses corresponding to communication codewords can provide enhanced communication capacity. We present a novel quantum receiver design methodology based on a quantum belief propagation algorithm that attains such enhancement. I will discuss the receiver design and the feasibility of implementing the receiver using noisy intermediate-scale non-error-corrected quantum processors of the type currently being developed in the quantum computing industry.

Bio: Kaushik Seshadreesan previously held postdoctoral positions at the Max Planck Institute for the Science of Light, and the Wyant College of Optical Sciences at the University of Arizona. Kaushik’s research broadly lies in quantum information science and technologies, spanning quantum information theory, quantum sensing, quantum communications, and quantum computation. He is currently primarily interested in quantum communication networks. As quantum technologies continue to grow and mature, interconnecting quantum gadgets such as quantum sensors or quantum computers is key to realizing their full potential. This requires the ability to communicate quantum information faithfully and efficiently over such quantum networks. Kaushik is interested in addressing research questions and challenges that lie across the different layers of a full quantum networking stack towards realizing the future quantum internet.

Registration link: https://pitt.zoom.us/webinar/register/WN_zSb2N6j7Q6mbXtMyyG2W3A