www.nature.com/articles/s41... I've been saying that entanglement-assisted stellar interferometry is unlikely to become practical in my lifetime, but that won't stop me from shamelessly claiming a little bit of credit every time others make heroic progress in this direction.
www.science.org/doi/10.1126/..., www.science.org/doi/10.1126/... STO has a Pockels coefficient >30x that of lithium niobate at cryogenic temperature. Sounds like a miracle.
Is QCMC dead as well?
To be fair the criticism also applies to a lot of my work though.
"This theory is going to revolutionize the car industry... We assume that the road is a frictionless plane and we won't study what happens when there is friction. We also perform a demo using superfluids." This is what a lot of quantum metrology papers look like to me.
If only everyone were this honest [Stroock, Gaussian Measures]
Thank you for your invitation. I am intrigued by paper, but unfortunately it is against my principles---and indeed common sense---to provide free service for a for-profit company. It is nothing personal and it has nothing to do with the quality of the paper. I appreciate your understanding.
It holds even in the classical case, where rho(X) = P(Y|X) is the probability distribution of an observation Y given X and a physical channel is modeled by a Markov map. Nothing mysterious or uniquely quantum about it.
No-cloning theorem in a tweet: define the tensor-product map f(rho)=rho x rho, plug in rho(X) as a function of unknown X, and observe that your favorite info measure (mine is quantum Fisher info) has increased. Since a physical channel can't increase info, f cannot be physical.
For those looking forward to the next edition of the Workshop on Quantum-Inspired Superresolution, previously held in 2021 and 2023 by Zoom (blog.nus.edu.sg/mankei/2nd-w...), sorry that I have not been able to host one this year, but I hope to do it again next summer.
The Bhattacharyya distance is so much better in this case—gives both a tighter lower bound and an upper bound on the hypothesis-testing error, within a factor of two of the optimal Chernoff exponent, doesn't blow up with pure states in quantum, amenable to Riemannian treatment in info geometry.
They are very gracious in acknowledging our theory, but the real heroes are of course the experimentalists who have to make it work in practice. Let’s hope it’s the first of many—the quantum is the limit!
absolutely delighted that people found our idea useful.
"On-sky Demonstration of Subdiffraction-limited Astronomical Measurement Using a Photonic Lantern." I haven't read the paper yet, but this sounds exciting. iopscience.iop.org/article/10.3... newsroom.ucla.edu/releases/tel...
When I review a bad paper but try to stay diplomatic
www.youtube.com/watch?v=MLh0... Stunning experiment of macroscopic quantum tunneling at room temperature! Widespread applications as well. (not trying to belittle the amazing Nobel achievement at all, just fun to point out)
SQUID and superconducting circuits are cool, but with all due respect the benefit of quantum computing to mankind is not even net positive yet.
Certainly a scientist of the highest calibre, but "greatest benefit to mankind"? Not sure about that.
The AI has spoken
x.com/arxiv/status... We have this curious phenomenon that the number of papers is exploding in recent years, but Nobel prizes are more often going to older people and older work. What if quantity is negatively correlated with quality?
Putting my thoughts together. Why networks beat "hero" sensors and what birds can teach us.
quantum-noise.ghost.io/quantum-sens...
doi.org/10.1109/MSP.... Sad to learn that Van Trees passed away in 2023. His books are for me the perfect balance of principles and practice. For many years they were my secret recipe for my research—just pick a chapter and generalize to quantum.
relative to what? V60?
Many have expressed interest in semiparametric theory but it seems to go over a lot of people's heads, so hope the notes help (although I'm hardly an expert on this). Quantum version follows naturally but not in the notes yet. P.S. I promise I'll come back to quantum and optics some day. (2/2)
Quantum Optics Lecture Notes v0.5: the main addition is Appendices K and L on the classical "semiparametric Cramer-Rao bound." (1/2)
www.ece.nus.edu.sg/stfpage/tmk/...
www.ece.nus.edu.sg/stfpage/tmk/...
A random memory: when I was an undergrad I went to an optics professor for advice; one question I asked was whether I could do research in theoretical optics. He looked at me with disgust and said, "there's nothing left to do in theoretical optics."
The long-term goal is to build a bridge from introductory quantum optics to my current research, although the bridge is going nowhere and neither sturdy nor accessible at the moment.
Quantum Optics Lecture Notes v0.4:
A4 size: www.ece.nus.edu.sg/stfpage/tmk/...
Letter size: www.ece.nus.edu.sg/stfpage/tmk/...
Added some appendices on open quantum systems and classical statistics. Updated the appendix on probability.
