Rafael Wagner
@quantumrw.bsky.social
PhD Student in quantum foundations and quantum information
Pinned
Rafael Wagner
@quantumrw.bsky.social
· Sep 23
Contextuality in Anomalous Heat Flow
For a class of quantum systems that exhibit contextuality, a rigorous theoretical connection between anomalous heat flow and quantumness is established, thereby opening avenues to explore nonclassical...
journals.aps.org
New paper out in #PRX_Quantum! 📃📃
We show when a heat-flow reversal is actually a signature of quantum nonclassicality as described by quantum generalized contextuality.
#QuantumInformation #Contextuality #Nonclassicality #QuantumThermodynamics
journals.aps.org/prxquantum/a...
We show when a heat-flow reversal is actually a signature of quantum nonclassicality as described by quantum generalized contextuality.
#QuantumInformation #Contextuality #Nonclassicality #QuantumThermodynamics
journals.aps.org/prxquantum/a...
Reposted by Rafael Wagner
Review: Ultrafast physics with structured light ⚛️
by Yiqi Fang, Zijian Lyu & Yunquan Liu
www.nature.com/articles/s42...
by Yiqi Fang, Zijian Lyu & Yunquan Liu
www.nature.com/articles/s42...
Ultrafast physics with structured light - Nature Reviews Physics
Spatiotemporal structuring of optical fields offers opportunities to probe and control electron motions in light–matter interactions. This Review discusses the recent advances in both fundamental phys...
www.nature.com
November 13, 2025 at 10:38 AM
Review: Ultrafast physics with structured light ⚛️
by Yiqi Fang, Zijian Lyu & Yunquan Liu
www.nature.com/articles/s42...
by Yiqi Fang, Zijian Lyu & Yunquan Liu
www.nature.com/articles/s42...
Reposted by Rafael Wagner
My student @johnbostanci.bsky.social, Chinmay Nirkhe, Jonas Haferkamp, and Mark Zhandry have put out a tour-de-force paper that shows, relative to a classical oracle, QMA is stronger than QCMA -- i.e., quantum proofs >> classical proofs. Congratulations to the authors! arxiv.org/abs/2511.09551
Separating QMA from QCMA with a classical oracle
We construct a classical oracle proving that, in a relativized setting, the set of languages decidable by an efficient quantum verifier with a quantum witness (QMA) is strictly bigger than those decid...
arxiv.org
November 13, 2025 at 2:59 AM
My student @johnbostanci.bsky.social, Chinmay Nirkhe, Jonas Haferkamp, and Mark Zhandry have put out a tour-de-force paper that shows, relative to a classical oracle, QMA is stronger than QCMA -- i.e., quantum proofs >> classical proofs. Congratulations to the authors! arxiv.org/abs/2511.09551
Reposted by Rafael Wagner
Well-informed and accurate takes on the current state of quantum computing by @dangaristo.bsky.social. Good listen if you're outside the field or just entering it and want to get an honest picture.
Kudos for using the term "physics experiment" instead of "computer", and for coining "quantum FOMO".
Kudos for using the term "physics experiment" instead of "computer", and for coining "quantum FOMO".
In which I said a few words about quantum computing and tried not to ramble too much.
Quantum computing: What's all the hype about?
We’ll unpack the promise of quantum computing.
www.marketplace.org
November 13, 2025 at 6:05 AM
Well-informed and accurate takes on the current state of quantum computing by @dangaristo.bsky.social. Good listen if you're outside the field or just entering it and want to get an honest picture.
Kudos for using the term "physics experiment" instead of "computer", and for coining "quantum FOMO".
Kudos for using the term "physics experiment" instead of "computer", and for coining "quantum FOMO".
Reposted by Rafael Wagner
A recent @nature.com article claims that classical (unquantised) gravity produces entanglement. We show that their model does not produce entanglement. Even if the model produced entanglement, it would be mediated by the quantised matter interaction, and not gravity. scirate.com/arxiv/2511.0... 🧪⚛️
Classical gravity cannot mediate entanglement
In Nature, 646, 813 (2025), Aziz and Howl claim that classical (unquantised) gravity produces entanglement. We show that their model does not produce entanglement. Even if the model produced entanglem...
scirate.com
November 11, 2025 at 3:24 PM
A recent @nature.com article claims that classical (unquantised) gravity produces entanglement. We show that their model does not produce entanglement. Even if the model produced entanglement, it would be mediated by the quantised matter interaction, and not gravity. scirate.com/arxiv/2511.0... 🧪⚛️
Reposted by Rafael Wagner
Day 2 of the #NaturalPhilosophy Symposium concluded with a panel discussion featuring the day's speakers: Alan Guth, Jennifer Nagel, David Albert, Simon DeDeo, Emily Riehl, and Anil Seth.
Stay tuned for the exciting final day of the Symposium!
www.youtube.com/watch?v=Apnv...
Stay tuned for the exciting final day of the Symposium!
www.youtube.com/watch?v=Apnv...
November 11, 2025 at 2:16 PM
Day 2 of the #NaturalPhilosophy Symposium concluded with a panel discussion featuring the day's speakers: Alan Guth, Jennifer Nagel, David Albert, Simon DeDeo, Emily Riehl, and Anil Seth.
Stay tuned for the exciting final day of the Symposium!
www.youtube.com/watch?v=Apnv...
Stay tuned for the exciting final day of the Symposium!
www.youtube.com/watch?v=Apnv...
Reposted by Rafael Wagner
The neat thing about writing about foundations of quantum mechanics is that it makes everyone mad, often for completely different reasons.
November 8, 2025 at 12:04 PM
The neat thing about writing about foundations of quantum mechanics is that it makes everyone mad, often for completely different reasons.
Reposted by Rafael Wagner
I wouldn't worry about a QIP reject. The conference is too crowded and big now, and so the PC is desperate to write down meaningless reasons for rejection. In my opinion, the smaller conferences are more significant these days, where more meaningful research interactions can take place.
November 8, 2025 at 9:15 AM
I wouldn't worry about a QIP reject. The conference is too crowded and big now, and so the PC is desperate to write down meaningless reasons for rejection. In my opinion, the smaller conferences are more significant these days, where more meaningful research interactions can take place.
Reposted by Rafael Wagner
Our new Helios quantum computer. Read all about it.
arxiv.org/abs/2511.05465
#quantum #quantumcomputing #quantinuum #helios
arxiv.org/abs/2511.05465
#quantum #quantumcomputing #quantinuum #helios
Helios: A 98-qubit trapped-ion quantum computer
We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features $^{137}$Ba$^{+}$ hyperfine qubits, all-to-all c...
arxiv.org
November 10, 2025 at 2:08 AM
Our new Helios quantum computer. Read all about it.
arxiv.org/abs/2511.05465
#quantum #quantumcomputing #quantinuum #helios
arxiv.org/abs/2511.05465
#quantum #quantumcomputing #quantinuum #helios
Reposted by Rafael Wagner
Our new quantum computer Helios is out. Take a look at this paper for technical details of its design, operations, and benchmarks.
arxiv.org/abs/2511.05465
arxiv.org/abs/2511.05465
Helios: A 98-qubit trapped-ion quantum computer
We report on Quantinuum Helios, a 98-qubit trapped-ion quantum processor based on the quantum charge-coupled device (QCCD) architecture. Helios features $^{137}$Ba$^{+}$ hyperfine qubits, all-to-all c...
arxiv.org
November 10, 2025 at 11:45 AM
Our new quantum computer Helios is out. Take a look at this paper for technical details of its design, operations, and benchmarks.
arxiv.org/abs/2511.05465
arxiv.org/abs/2511.05465
Had a great time in Paris!
Talked about our recent preprint arxiv.org/abs/2509.10949
#QuiDiQua3 was great, lots of greats discussions, and talks. Happy also to catch up on some good friends :)
Can't wait for #QuiDiQua4 (next year in Brussels!)
#QuantumInfo #Contextuality #QuantumOptics
Talked about our recent preprint arxiv.org/abs/2509.10949
#QuiDiQua3 was great, lots of greats discussions, and talks. Happy also to catch up on some good friends :)
Can't wait for #QuiDiQua4 (next year in Brussels!)
#QuantumInfo #Contextuality #QuantumOptics
November 10, 2025 at 9:25 PM
Had a great time in Paris!
Talked about our recent preprint arxiv.org/abs/2509.10949
#QuiDiQua3 was great, lots of greats discussions, and talks. Happy also to catch up on some good friends :)
Can't wait for #QuiDiQua4 (next year in Brussels!)
#QuantumInfo #Contextuality #QuantumOptics
Talked about our recent preprint arxiv.org/abs/2509.10949
#QuiDiQua3 was great, lots of greats discussions, and talks. Happy also to catch up on some good friends :)
Can't wait for #QuiDiQua4 (next year in Brussels!)
#QuantumInfo #Contextuality #QuantumOptics
Reposted by Rafael Wagner
Department of Physics at UIUC is looking for an Assistant Professor in Theoretical Quantum Information Science, including, but not limited to, quantum error correction, quantum optics, quantum algorithms, and AMO physics.
Application deadline: Dec 1
illinois.csod.com/ux/ats/caree...
Application deadline: Dec 1
illinois.csod.com/ux/ats/caree...
Grainger Engineering: Assistant Professor in Theoretical QIS - Department of Physics
Duties & Responsibilities
illinois.csod.com
November 5, 2025 at 1:14 PM
Department of Physics at UIUC is looking for an Assistant Professor in Theoretical Quantum Information Science, including, but not limited to, quantum error correction, quantum optics, quantum algorithms, and AMO physics.
Application deadline: Dec 1
illinois.csod.com/ux/ats/caree...
Application deadline: Dec 1
illinois.csod.com/ux/ats/caree...
Reposted by Rafael Wagner
Happy to share our TEDx talk where me and my twin @antonioannamele.bsky.social chat about quantum technologies!
(Italian only)
youtu.be/yzXUsDUPt8A?...
(Italian only)
youtu.be/yzXUsDUPt8A?...
Quantum Computer: una possibile rivoluzione | Francesco Anna Mele & Antonio Anna Mele | TEDxPolicoro
YouTube video by TEDx Talks
youtu.be
November 5, 2025 at 6:31 PM
Happy to share our TEDx talk where me and my twin @antonioannamele.bsky.social chat about quantum technologies!
(Italian only)
youtu.be/yzXUsDUPt8A?...
(Italian only)
youtu.be/yzXUsDUPt8A?...
#QuiDiQua3 alert!!
Happy to be in Paris for such a nice conference in quantum info, optics, and foundations all linked by quasiprobability distributions!
Happy to be in Paris for such a nice conference in quantum info, optics, and foundations all linked by quasiprobability distributions!
November 5, 2025 at 1:45 PM
#QuiDiQua3 alert!!
Happy to be in Paris for such a nice conference in quantum info, optics, and foundations all linked by quasiprobability distributions!
Happy to be in Paris for such a nice conference in quantum info, optics, and foundations all linked by quasiprobability distributions!
Reposted by Rafael Wagner
Now under construction: The bridge connecting research on quantum matter and quantum information in the Ginsburg Center @caltech.edu to the high energy theory group in Downs-Lauritsen Laboratory. Exciting!
October 29, 2025 at 5:13 PM
Now under construction: The bridge connecting research on quantum matter and quantum information in the Ginsburg Center @caltech.edu to the high energy theory group in Downs-Lauritsen Laboratory. Exciting!
Reposted by Rafael Wagner
People take for granted the fact that mangos are so delicious, but most don’t know that every logical mango is made out of many physical mangos.
October 30, 2025 at 6:52 AM
People take for granted the fact that mangos are so delicious, but most don’t know that every logical mango is made out of many physical mangos.
Reposted by Rafael Wagner
The Paul Ehrenfest Best Paper Award for #Quantum Foundations for 2024 has been awarded to Rainer Verch and Chris Fewster in recognition of their outstanding paper, “Quantum Fields and Local Measurements.”
Congratulations!
Congratulations!
October 30, 2025 at 1:41 PM
The Paul Ehrenfest Best Paper Award for #Quantum Foundations for 2024 has been awarded to Rainer Verch and Chris Fewster in recognition of their outstanding paper, “Quantum Fields and Local Measurements.”
Congratulations!
Congratulations!
Reposted by Rafael Wagner
Learn more about this discovery in the scientific paper on "Error detection without post-selection in adaptive quantum circuits".
🔬: arxiv.org/abs/2509.25326
🔬: arxiv.org/abs/2509.25326
Error detection without post-selection in adaptive quantum circuits
Current quantum computers are limited by errors, but have not yet achieved the scale required to benefit from active error correction in large computations. We show how simulations of open quantum sys...
arxiv.org
October 30, 2025 at 4:14 PM
Learn more about this discovery in the scientific paper on "Error detection without post-selection in adaptive quantum circuits".
🔬: arxiv.org/abs/2509.25326
🔬: arxiv.org/abs/2509.25326
I am super happy to have finished my #PhD in #Quantum!!
Thank you all for my friends and for my amazing supervisors!!
I am super happy! Soon I'll post my thesis on arXiv :)
Thank you all for my friends and for my amazing supervisors!!
I am super happy! Soon I'll post my thesis on arXiv :)
Newly minted PhD! Rafael Wagner passed his PhD viva at Univ. Minho today with flying colours. Multiple papers and collaborations, deep foundational insights and even experiments, this thesis has it all. Congrats Rafael! @inlnano.bsky.social
October 30, 2025 at 2:55 PM
Reposted by Rafael Wagner
Thinking of patenting my favorite method for ranking researchers: reading their papers and deciding whether they are good.
Hilariously bad idea. In my subfield author lists are almost always alphabetical!
🧪For those of us who do complex collaborations with multiple corresponding authors this is terrible . I suspect it will also hit female authors disproportionately as they tend to have more collaborations across fields…https://www.nature.com/articles/d41586-025-03281-4
October 26, 2025 at 4:04 PM
Thinking of patenting my favorite method for ranking researchers: reading their papers and deciding whether they are good.
Gold
Over the recent weeks and months, John Preskill and I sat down to think about where we are in quantum computing. While the noisy intermediate-scale quantum (#NISQ) era is just unfolding as we speak, the time seems right to look ahead to the next steps to come.
scirate.com/arxiv/2510.1...
scirate.com/arxiv/2510.1...
October 24, 2025 at 11:23 AM
Gold
Reposted by Rafael Wagner
I also think its a bit weird that the paper has not addressed many known mechanisms/no-go theorems showing that this is indeed impossible.
Which aspects of these theorems are you avoiding?
This work is only bringing confusion to an already delicate highly interdisciplinary research topic.
Which aspects of these theorems are you avoiding?
This work is only bringing confusion to an already delicate highly interdisciplinary research topic.
No they do not. I'll try to write something up in the next few days....
October 24, 2025 at 11:21 AM
I also think its a bit weird that the paper has not addressed many known mechanisms/no-go theorems showing that this is indeed impossible.
Which aspects of these theorems are you avoiding?
This work is only bringing confusion to an already delicate highly interdisciplinary research topic.
Which aspects of these theorems are you avoiding?
This work is only bringing confusion to an already delicate highly interdisciplinary research topic.
Reposted by Rafael Wagner
As promised... No, classical spacetime can’t produce entanglement. I can create entanglement by turning a knob on a laser, but the knob isn't mediating entanglement. Is the knob "producing" the entanglement? This week's Nature paper is causing confusion! superposer.substack.com/p/no-classic... 🧪⚛️
No they do not. I'll try to write something up in the next few days....
October 24, 2025 at 9:29 AM
As promised... No, classical spacetime can’t produce entanglement. I can create entanglement by turning a knob on a laser, but the knob isn't mediating entanglement. Is the knob "producing" the entanglement? This week's Nature paper is causing confusion! superposer.substack.com/p/no-classic... 🧪⚛️
“The public has a distorted view of science, because children are taught in school that science is a collection of firmly established truths.
In fact, science is not a collection of truths. It is a continuing exploration of mysteries”
Freeman Dyson (1923–2020), in "How We Know", 2011
In fact, science is not a collection of truths. It is a continuing exploration of mysteries”
Freeman Dyson (1923–2020), in "How We Know", 2011
October 19, 2025 at 9:05 AM
“The public has a distorted view of science, because children are taught in school that science is a collection of firmly established truths.
In fact, science is not a collection of truths. It is a continuing exploration of mysteries”
Freeman Dyson (1923–2020), in "How We Know", 2011
In fact, science is not a collection of truths. It is a continuing exploration of mysteries”
Freeman Dyson (1923–2020), in "How We Know", 2011