Lecture On: Photonic Platforms for Quantum Information Technologies By Dr. Syamsundar De
DEPARTMENT OF INSTRUMENTATION AND APPLIED PHYSICS
INDIAN INSTITUTE OF SCIENCE
BANGALORE – 560 012
Cordially invites you for a short lecture on
“Photonic Platforms for Quantum Information Technologies: From Time-Multiplexing to Measurement-Based Methods”
By
Dr. Syamsundar De
Integrated Quantum Optics (IQO),
Institute for Photonic Quantum Systems (PhoQS), Paderborn University,
Germany.
Date: Friday, July 9, 2021
Time: 04.00 P.M
Venue: Online (Microsoft Teams):
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teams.microsoft.com
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Abstract
Historically, photonic platforms have served as a formidable testing ground for the fundamental ideas of quantum physics such as quantum superposition and entanglement. Over the years, maturing photonic technologies have led us to the current situation where these technologies are increasingly being applied for the development of practical quantum information applications by harnessing the aforementioned quantum principles. Photonic platforms are, indeed, appealing due to their low decoherence, low loss, light-speed transmission, and ease of manipulation. The next-generation photonic technologies are continually seeking methodologies to scale up the capacity of a system to encode a large amount of quantum information to benefit from a true quantum advantage. In this talk, I will introduce two promising approaches, namely, time-multiplexing and measurement-based methods, that enable the implementation of large-scale, reconfigurable photonic networks to tackle the scaling bottleneck. While in the former each network node corresponds to a time-bin mode of pulsed light, for the latter the effect of the evolutions through the network are reproduced by measuring in the appropriate superposition bases. I will, subsequently, discuss how the realization of such original photonic quantum networks, on the one hand, facilitates exploring novel fundamental quantum effects intrinsic to network architectures (e.g., local versus global quantum interference). On the other hand, it paves the route towards the implementation of practical quantum simulation (e.g., transport of quantum particles in disordered medium) and quantum computation (e.g., quantum walks on high-dimensional graphs) protocols.
Biography:
Dr. Syamsundar De received his BSc in Physics and BTech in Radio Physics and Electronics from the University of Calcutta in 2007 and 2010, respectively. In 2010, he was awarded the Thales-French Ministry of External and European Affairs Scholarship owing to outstanding academic merit for pursuing a Master’s degree. He received his Master’s degree in Applied Physics from École Polytechnique, France in 2012. Later that year, he obtained EDOM doctoral fellowship from Paris-Saclay University to pursue his doctoral research under the supervision of Prof. Fabien Bretenaker at Aimé-Cotton Laboratory. He obtained his Ph.D. in 2015 and he was awarded the “Best Thesis” prize from Paris-Saclay University for his thesis, entitled ‘Noise in Dual-Frequency Semiconductor and Solid-State Lasers’. In 2015, he joined the group of Prof. Nicolas Treps and Prof. Claude Fabre at Kastler-Brossel Laboratory at Sorbonne University, France as a postdoc. From 2018 onwards, he is working as a research associate in the group of Prof. Christine Silberhorn at Paderborn University, Germany. His research interests include ultrafast quantum optics, complex quantum networks, high-dimensional quantum encoding, hybrid quantum systems combining discrete- and continuous-variable techniques, high-precision time frequency metrology, and laser dynamics and noise.
Host Faculty: Prof. Sai Siva Gorthi
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ALL ARE WELCOME
CHAIRMAN
Date/Time
Date(s) - 09/07/2021
4:00 pm - 5:30 pm
Online-Microsoft Teams
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