Sign in

Francesco Anna Mele

@francescoannamele.bsky.social
244 followers 369 following 153 posts

IQIM postdoctoral Scholar at Caltech

PostsRepliesMedia
Francesco Anna Mele @francescoannamele.bsky.social · 04/10/2026
Q learning theory has been extensively developed in settings where the unknown object to learn is a state or a channel. Much less is known when the unknown object instead evolves continuously through time, like a physical signal (e.g. electromagnetic or gravitational waves) 1/
140
Francesco Anna Mele @francescoannamele.bsky.social · 03/10/2026
Remember one of the invited talk at QIP26? It was about an experiment run on Google’s quantum computer as a promising way to experimentally demonstrate verifiable quantum advantage. This became colloquially known as “Quantum Echoes” 1/
130
Reposted by Francesco Anna Mele
Adam Wills @adamwills1.bsky.social · 29/09/2026
Particularly excited for this year’s installment of “who can get the highest QIP registration number”
091
Francesco Anna Mele @francescoannamele.bsky.social · 27/09/2026
How does classical behaviour emerge from quantum mechanics? In our new paper, we answer this question through the lens of Gaussian state learning. arxiv.org/pdf/2609.26705
162
Francesco Anna Mele @francescoannamele.bsky.social · 31/07/2026
It’s not as famous as the Jacobian conjecture, but it puzzled theorists in bosonic quantum communication for long time, since a 1999 seminal work by Holevo and Werner. Yes, there is a non-Gaussian state that improves the Holevo-Werner lower bound on the quantum capacity of the thermal attenuator! 1
150
Francesco Anna Mele @francescoannamele.bsky.social · 25/07/2026
This is exactly the kind of public and constructive discussion I was hoping to see! Robert Huang is talking about the impact of AI and the social norms around its use in our qinfo community www.youtube.com/live/vT5blu-...
youtube.com
Talk by Hsin-Yuan Huang (Caltech)
YouTube video by Simons Institute for the Theory of Computing
1182
Reposted by Francesco Anna Mele
Robin Kothari @robinkothari.bsky.social · 22/07/2026
Frontier LLMs can now solve many quantum computing and theoretical computer science problems that I've personally spent weeks or months working on. How is everyone else dealing with the existential crisis that accompanies this reality?
5194
Francesco Anna Mele @francescoannamele.bsky.social · 22/07/2026
Sadly, unless you pay $200 per month (230 EUR if you’re European 🙂), you’re no longer as competitive in quantum info theory (as I guess in any applied-math topic).
5213
Francesco Anna Mele @francescoannamele.bsky.social · 11/05/2026
In this paper, I review recent advances in quantum learning theory with bosonic systems. I hope that it is a pedagogical start to get you up to date on this exciting new field, which unveils many fundamental research questions. arxiv.org/pdf/2605.08082
1110
Francesco Anna Mele @francescoannamele.bsky.social · 21/04/2026
Happy to be joining Google Quantum AI as a Student Researcher starting this May! I’ll start in Los Angeles at the 2026 Google Quantum Summer Symposium, and then I’ll be based in Munich, where I’ll be working with Tom O'Brien. Really looking forward to it!
1110
Francesco Anna Mele @francescoannamele.bsky.social · 20/03/2026
In today’s paper, we make important advances in our understanding of tomography of CV Gaussian states! arxiv.org/pdf/2603.18136 1/
191
Reposted by Francesco Anna Mele
Richard Kueng @richardkueng.bsky.social · 08/01/2026
This year's Quantum Computing Theory in Practice Conference (QCTiP) is scheduled for 04/20/2026-04/25/2026 in Oxford, UK 🇬🇧: qctipconf.github.io Talk submission deadline is just round the corner: 01/11/2026. Looking forward to many exciting contributions and a great time in Hogwarts🪄, aehm Oxford🎓.
11810
Francesco Anna Mele @francescoannamele.bsky.social · 25/12/2025
Listening this song while writing my PhD thesis
030
Francesco Anna Mele @francescoannamele.bsky.social · 05/12/2025
Happy to share that our paper “Complexity of quantum tomography from genuine non-Gaussian entanglement” has been published in Nature Communications! www.nature.com/articles/s41... Thanks a lot to my great coauthors Xiaobin Zhao, Pengcheng Liao, Ulysse Chabaud, and Quntao Zhuang!
nature.com
Complexity of quantum tomography from genuine non-Gaussian entanglement - Nature Communications
The interplay between properties of quantum correlation and learning sample complexity in bosonic quantum systems is currently unclear. The authors prove efficient learning for broad classes of non-Ga...
030
Francesco Anna Mele @francescoannamele.bsky.social · 01/12/2025
Given a mixed state, one can always write down its purifications. However, the “purification operation” is unphysical, i.e. it cannot be realised via a quantum channel. arxiv.org/pdf/2511.234... 1/
180
Reposted by Francesco Anna Mele
Jens Eisert @jenseisert.bsky.social · 29/11/2025
This is a publication I am extremely happy about. It is a bit rebellious, and yet it touches upon an old and important question: How can we learn an unknown continuous quantum state from data? www.nature.com/articles/s41... We prove that quantum state tomography is a lot harder than anticipated.
1111
Francesco Anna Mele @francescoannamele.bsky.social · 26/11/2025
Nature Physics has published our work! nature.com/articles/s4156… Thanks a lot to my amazing coauthors @antonioannamele.bsky.social , Lennart Bittel, @jenseisert.bsky.social, Vittorio Giovannetti, Ludovico Lami, Lorenzo Leone, @sfeoliviero.bsky.social !
nature.com
190
Francesco Anna Mele @francescoannamele.bsky.social · 08/11/2025
So excited that my coauthors and I have three papers accepted at QIP this year! - Optimising quantum data hiding arxiv.org/abs/2510.03538 - Efficient learning of CV Gaussian unitaries arxiv.org/abs/2510.05531 - Is it Gaussian? Testing CV Gaussian states arxiv.org/pdf/2510.07305
arxiv.org
Optimising quantum data hiding
Quantum data hiding is the existence of pairs of bipartite quantum states that are (almost) perfectly distinguishable with global measurements, yet close to indistinguishable when only measurements im...
0110
Reposted by Francesco Anna Mele
Dulwich Quantum Computing @dulwichquantum.bsky.social · 05/11/2025
The only thing that could possibly be hotter than Italian twins explaining entanglement in Italian is Italian triplets explaining the GHZ state.
0314
Francesco Anna Mele @francescoannamele.bsky.social · 05/11/2025
Happy to share our TEDx talk where me and my twin @antonioannamele.bsky.social chat about quantum technologies! (Italian only) youtu.be/yzXUsDUPt8A?...
youtu.be
Quantum Computer: una possibile rivoluzione | Francesco Anna Mele & Antonio Anna Mele | TEDxPolicoro
YouTube video by TEDx Talks
0201
Francesco Anna Mele @francescoannamele.bsky.social · 05/11/2025
Honoured to have received the Boeing Quantum Creators Prize at the Chicago Quantum Exchange event today! This prize recognises early-career researchers who advance quantum information in new directions
1120
Francesco Anna Mele @francescoannamele.bsky.social · 09/10/2025
Okay, last post on *quantum learning theory with CV systems* (for a few months🫣) Today's new work tackles another natural and central question in this rapidly developing field: Given an unknown CV state, how to test whether is it Gaussian or not? arxiv.org/pdf/2510.07305 1/
181
Francesco Anna Mele @francescoannamele.bsky.social · 08/10/2025
The saga of *quantum learning theory with CV systems* never ends! And indeed, when you look closely at this field, many natural and promising questions arise. For instance: How to learn CV Gaussian unitaries? arxiv.org/pdf/2510.05531 1/
2102
Francesco Anna Mele @francescoannamele.bsky.social · 07/10/2025
New work on *quantum data hiding*! If you have a quirk for semidefinite/linear programming as an analytical tool for quantum info, this paper might interest you arxiv.org/pdf/2510.03538 1/
170
Francesco Anna Mele @francescoannamele.bsky.social · 26/09/2025
Excited and honored to be selected as a winner of the Boeing Quantum Creators Prize 🥳 This international award recognizes early-career researchers who are advancing quantum information science and engineering in new directions! 🔗 chicagoquantum.org/2025BQCP
3190
Francesco Anna Mele @francescoannamele.bsky.social · 22/09/2025
So honored to receive the award for new talented physicists from the Italian Physical Society🥳 en.sif.it
0200
Francesco Anna Mele @francescoannamele.bsky.social · 19/09/2025
My website is now online! 🔗 sites.google.com/sns.it/franc... I’ll try to keep it updated with my research work.
sites.google.com
Francesco Anna Mele
ABOUT ME
080
Francesco Anna Mele @francescoannamele.bsky.social · 29/04/2025
I’d like to advertise two cute technical results of today’s paper that may be of independent interest (I hope): A new decomposition of Gaussian unitaries and new bosonic trace distance bounds (the saga of bosonic trace distance bounds never ends! 😍) arxiv.org/abs/2504.19319 1/
181
Francesco Anna Mele @francescoannamele.bsky.social · 29/04/2025
New bosonic paper out! Take the covariance matrix of a pure state and count the number of symplectic eigenvalues that are strictly larger than one: this is a powerful non-Gaussian monotone — the *symplectic rank* arxiv.org/abs/2504.19319 1/
1101
Francesco Anna Mele @francescoannamele.bsky.social · 28/03/2025
New paper out today on "Q Thermo with CV systems"! What is the maximum energy that you can extract from a quantum state via Gaussian unitaries only? We solve this problem by establishing a simple, cute formula for the *Gaussian ergotropy*. 1/ arxiv.org/abs/2503.21748
181
Francesco Anna Mele @francescoannamele.bsky.social · 18/03/2025
New paper out!
 We study one-shot q communication over reasonable non-Markovian lossy Gaussian channels. To do so, we prove error bounds on the convergence rate of the *powerful* Avram-Parter's (and Szego's) theorem, which may be of independent interest in matrix analysis. arxiv.org/abs/2503.13207
arxiv.org
Non-asymptotic quantum communication on lossy transmission lines with memory
Non-asymptotic quantum Shannon theory analyses how to transmit quantum information across a quantum channel as efficiently as possible within a specified error tolerance, given access to a finite, fix...
150
Francesco Anna Mele @francescoannamele.bsky.social · 07/03/2025
Our paper on Computable Entanglement Cost has finally been published in PRL. Take a look! journals.aps.org/prl/abstract... @physicists, when you compute the famous *logarithmic negativity*, you should compute our quantity instead! 1/
1232