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Effective Non-Hermitian Quantum Physics - From Sensing to Exotic Topology by Aashish Clerk

International Centre for Theoretical Sciences via YouTube

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Explore the fascinating world of non-Hermitian quantum physics in this 50-minute lecture by Aashish Clerk at the International Centre for Theoretical Sciences. Delve into topics ranging from sensing applications to exotic topology, covering dispersive measurements, exceptional point sensing, and the Kitaev Majorana chain. Learn about the challenges and potential of non-Hermitian systems, including fluctuation effects, signal strength, and bounds on signal-to-noise ratio. Discover how non-reciprocity can enhance sensors and gain insights into phase-dependent directionality. Conclude with a Q&A session addressing potential implementations of these concepts in real-world applications.

Syllabus

Non-Hermitian Physics - PHHQP XVIII
Effective Non-Hermitian Quantum Physics: From Sensing to Exotic Topology
Non-Hermitian Quantum Dynamics: From Sensing to Novel Topology
Dispersive measurement
Generalized dispersive setup
Exceptional point sensing
Experiments on EP Sensing
Issues
Including fluctuation effects
Modelling a realistic measurement
Signal Strength
Bound from reciprocity
Signal to noise ratio
Bounds on SNR
Non-reciprocity enhanced sensors
Summary: non-Hermitian quantum sensing
Quick Review: Kitaev Majorana chain
Momentum space picture
From Majoranas to quadratures
Phase-dependent directionality
Conclusions
Q&A
Implementations?