M. Tsang, “Quantum reversal: a general theory of coherent quantum absorbers,” Quantum 9, 1650 (2025) [PDF]. Go to the journal website for a popular summary.
Heraeus Seminar on Multiparameter Quantum Sensing and Metrology in Bad Honnef, Germany on Feb 3-6
I will be giving a talk at the workshop. Food and lodging are free for all participants. Application deadline is November 28.
Quantum Onsager relations accepted by Quantum Science and Technology
Mankei Tsang, “Quantum Onsager relations,” Quantum Science and Technology 10, 015015 (2024); https://doi.org/10.1088/2058-9565/ad8513.
A preprint, before a minor revision was accepted, is available at https://arxiv.org/abs/2403.12896.
This work generalizes the celebrated Onsager relations in statistical physics using Fisher information in parameter estimation theory, revealing a remarkable connection between the two areas.
Quantum optics lecture notes v0.2.1
Bug fixes.
A4 paper size: https://www.ece.nus.edu.sg/stfpage/tmk/Quantum_Optics_v0.2.1.pdf
US letter paper size: https://www.ece.nus.edu.sg/stfpage/tmk/Quantum_Optics_letterpaper_v0.2.1.pdf
Quantum optics lecture notes
I am sharing the lecture notes for an undergraduate course PC4246 Quantum Optics that I will be teaching at NUS next semester:
https://www.ece.nus.edu.sg/stfpage/tmk/Quantum_Optics_v0.2.pdf
Still very rough; use at your own risk. Comments welcome. I include only topics that are essential in my humble and very biased opinion and I have to omit many other important topics; apologies if I omit your favorites. The course will cover Chapter 1-12. Chapter 13 is the beginning of an attempt to bridge between the basics and my own research; hope to add more chapters in the future.
New paper, upcoming talks
| Xiao-Jie Tan and Mankei Tsang | Quantum limit to subdiffraction incoherent optical imaging. III. Numerical analysis | Physical Review A 108, 052416 (2023) |
| Mankei Tsang | Quantum noise spectroscopy as an incoherent imaging problem | Invited Talk | 53rd Winter Colloquium on the Physics of Quantum Electronics, Snowbird, Utah, USA | 2024-01-10 |
| Mankei Tsang | Quantum-inspired incoherent imaging and optomechanical sensing | IQIM Seminar, Caltech, USA | 2024-01-12 |
Quantum conditional expectations
Our latest work on quantum conditional expectations is published in Quantum:
| Mankei Tsang | Operational meanings of a generalized conditional expectation in quantum metrology | Quantum 7, 1162 (2023) |
This work is a continuation of the following:
| Mankei Tsang | Generalized conditional expectations for quantum retrodiction and smoothing | Physical Review A 105, 042213 (2022) |
I gave a talk on the basic idea at the University of Toronto on Nov 10; the recording is here:
https://www.youtube.com/watch?v=dAkvLLvhlTw
and the slides are here:
https://drive.google.com/file/d/1GpNSbcrr-MI7cTqkTY32nWYck76mdGe6/view?usp=drive_link
Recent recordings
- “Resolving starlight: a quantum perspective,” CQIQC/QO/AMO Seminar, University of Toronto, Canada, Oct 20, 2023: https://www.youtube.com/watch?v=458pYv8QVtE. [Slides PDF]
- “Quantum waveform estimation, detection, and noise spectroscopy,” KITP Conference “Frontiers of Quantum Metrology,” UCSB, USA, Oct 12, 2023: https://online.kitp.ucsb.edu/online/qmetro-c23/tsang/. [Slides PDF]
KITP UCSB seminar recording
A recording of my seminar “Resolving starlight: a quantum perspective” at the Kavli Institute for Theoretical Physics (KITP), University of California-Santa Barbara (under the program “New Directions in Quantum Metrology“) on 13 Sep, 2023 is here:
https://online.kitp.ucsb.edu/online/qmetro23/tsang/
The slides can be found at the website above or here.