Why Light-Matter Interaction is Like a Chemical Reaction: Stochastic Simulation of Nanolasers
#Quantum
#Entanglement
#PhaseEstimation
#QuantumComputing
Abstract:
Nanolasers operating at low power levels have intrinsic quantum noise, strongly affecting intensity fluctuations and laser coherence. In this talk, I’ll show how we can use stochastic simulation methods, originally developed for modeling chemical reactions, to study the interaction of photons and electrons in nanolasers. Starting from full quantum mechanical master equations, I derive a Markov-chain model, which can be sampled using Gillespie's First Reaction Method to accurately predict many properties of the nanolaser, including the intensity noise and emission spectrum. This approach offers a way to model and study the mesoscopic regime of nanolasers, with several tens or hundreds of emitters, where full quantum mechanical treatments are impossible and semiclassical rate equations with Langevin noise are invalid.
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- J. Armand Bombardier J-1034, Polytechnique Montréal
- Montréal, Quebec
- Canada H3T 1J4
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Contact: nicolas.quesada@polymtl.ca
- Co-sponsored by Prof. Nicolas Quesada
- Starts 20 March 2026 09:00 PM UTC
- Ends 26 March 2026 05:00 PM UTC
- No Admission Charge
Speakers
Matias Bundgaard-Nielsen of Technical University of Denmark
Topic:
Why Light-Matter Interaction is Like a Chemical Reaction: Stochastic Simulation of Nanolasers
Abstract:
Nanolasers operating at low power levels have intrinsic quantum noise, strongly affecting intensity fluctuations and laser coherence. In this talk, I’ll show how we can use stochastic simulation methods, originally developed for modeling chemical reactions, to study the interaction of photons and electrons in nanolasers. Starting from full quantum mechanical master equations, I derive a Markov-chain model, which can be sampled using Gillespie's First Reaction Method to accurately predict many properties of the nanolaser, including the intensity noise and emission spectrum. This approach offers a way to model and study the mesoscopic regime of nanolasers, with several tens or hundreds of emitters, where full quantum mechanical treatments are impossible and semiclassical rate equations with Langevin noise are invalid.
Biography:
Matias Bundgaard-Nielsen is a PhD student in quantum optics at the Technical University of Denmark, working on computational methods for open quantum systems. His research focuses on non-Markovian dynamics, quantum noise in nanophotonic systems, and the modeling of propagating quantum states of light. He is the creator of the open-source Julia package WaveguideQED.jl, and his work combines theoretical physics with high-performance scientific computing.