Turns out some ultimate limits may not be as ultimate as you think.
With Kaiyuan Ji we show how allowing just a little inconclusiveness is enough to beat fundamental bounds in quantum hypothesis testing — and much more can be achieved by accepting higher costs.
arxiv.org/abs/2510.07601
2nd paper proves that the pretty good measurement for a general bosonic ensemble is pretty good for estimation
Combining these results, the pretty good measurement for a bosonic Gaussian ensemble is Gaussian & pretty good for estimation. So this begs for an experimental realization
2/2
Two recent works joint w/ Hemant Mishra and @ludovicolami.bsky.social are ripe for quantum optics experimentalists to consider:
arxiv.org/abs/2303.04949
arxiv.org/abs/2505.20447
1st paper proves that the pretty good measurement for a bosonic Gaussian ensemble is a bosonic Gaussian measurement
1/2
Happy Pi Day everyone! We are finally posting more photos!
Day 4 began with a dual feature on the generalized quantum Stein's lemma: Masahito Hayashi from The Chinese University of Hong Kong, Shenzen and Ludovico Lami from Scuola Normale Superiore (@sns.it)!
#MasahitoHayashi #LudovicoLami
I have a positive update regarding this matter:
The German National Library of Science and Technology in Hannover (TIB, www.tib.eu) confirmed that they will download and archive the entire arxiv.org as a safety measure.
Thanks a lot Jens, really honoured that you like the paper. Also the talk in Switzerland was an incredibly entertaining--and interactive--experience!
Our third short plenary is a merged talk about a solution for the generalized quantum Stein’s lemma, and asymptotic quantification of entanglement with a single copy. @ludovicolami.bsky.social (#qusoft and @sns.it) #MarioBerta #BartoszRegula
