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
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
Reposted by Rafael Wagner
Ruhende HI-Viren aus der Deckung holen: Das kann ein körpereigenes Protein🦠, das als Vitamin-A-Transporter 🚚bekannt ist. Ulmer Forschende haben diesen natürlichen Wirkstoff zur Latenz-Umkehr entdeckt. Die ist ein weiterer Schritt in Richtung AIDS-Heilung. t1p.de/RBP4 *wt/🔬: Pastorio #uulm
October 16, 2025 at 12:19 PM
Ruhende HI-Viren aus der Deckung holen: Das kann ein körpereigenes Protein🦠, das als Vitamin-A-Transporter 🚚bekannt ist. Ulmer Forschende haben diesen natürlichen Wirkstoff zur Latenz-Umkehr entdeckt. Die ist ein weiterer Schritt in Richtung AIDS-Heilung. t1p.de/RBP4 *wt/🔬: Pastorio #uulm
Reposted by Rafael Wagner
With a long transfer from the Sahara to Fes, I finally finished going through the starter packs below. It was great to see everything you all have been working on! I like to spend some time reading through each profile, so I start to remember who's working on what. Please comment more starter packs!
October 12, 2025 at 8:07 AM
With a long transfer from the Sahara to Fes, I finally finished going through the starter packs below. It was great to see everything you all have been working on! I like to spend some time reading through each profile, so I start to remember who's working on what. Please comment more starter packs!
Reposted by Rafael Wagner
What if the measurement problem isn't about explaining how the classical world emerges from the quantum world...
...but about what happens when quantum systems interact with something that's already classical?
Turns out, the collapse postulate + Born rule emerge!
scirate.com/arxiv/2510.0...
🧪⚛️🧵1/5
...but about what happens when quantum systems interact with something that's already classical?
Turns out, the collapse postulate + Born rule emerge!
scirate.com/arxiv/2510.0...
🧪⚛️🧵1/5
A one-world interpretation of quantum mechanics
The measurement problem is the issue of explaining how the objective classical world emerges from a quantum one. Here we take a different approach. We assume that there is an objective classical syste...
scirate.com
October 13, 2025 at 7:49 AM
What if the measurement problem isn't about explaining how the classical world emerges from the quantum world...
...but about what happens when quantum systems interact with something that's already classical?
Turns out, the collapse postulate + Born rule emerge!
scirate.com/arxiv/2510.0...
🧪⚛️🧵1/5
...but about what happens when quantum systems interact with something that's already classical?
Turns out, the collapse postulate + Born rule emerge!
scirate.com/arxiv/2510.0...
🧪⚛️🧵1/5
Rudi B. P. Pietsch, one of the PhD Students I co-supervise (with prof. Plenio) here at the University of Ulm #UniUlm recently published his first ever research article at #PRA!
Huge congrats to Rudi and Dani!
Its the first of many : )
#QuantumThermodynamics
journals.aps.org/pra/abstract...
Huge congrats to Rudi and Dani!
Its the first of many : )
#QuantumThermodynamics
journals.aps.org/pra/abstract...
October 13, 2025 at 3:01 PM
Rudi B. P. Pietsch, one of the PhD Students I co-supervise (with prof. Plenio) here at the University of Ulm #UniUlm recently published his first ever research article at #PRA!
Huge congrats to Rudi and Dani!
Its the first of many : )
#QuantumThermodynamics
journals.aps.org/pra/abstract...
Huge congrats to Rudi and Dani!
Its the first of many : )
#QuantumThermodynamics
journals.aps.org/pra/abstract...
Reposted by Rafael Wagner
New (single-author) work: If you simply switch on a typical short-range Hamiltonian for constant time and then measure, the resulting distribution is generically intractable for classical computers.
scirate.com/arxiv/2510.0...
scirate.com/arxiv/2510.0...
Quantum advantage from random geometrically-two-local Hamiltonian dynamics
Classical hardness-of-sampling results are largely established for random quantum circuits, whereas analog simulators natively realize time evolutions under geometrically local Hamiltonians. Does a ty...
scirate.com
October 9, 2025 at 12:46 PM
New (single-author) work: If you simply switch on a typical short-range Hamiltonian for constant time and then measure, the resulting distribution is generically intractable for classical computers.
scirate.com/arxiv/2510.0...
scirate.com/arxiv/2510.0...
Can't wait to drink contextual tea
Put in mind of the Infinite Improbability Drive, as I listen to Bárbara Amaral explain over @cqiqc-uoft.bsky.social Quantum Tea how contextuality may power anomalous heat flow…
see journals.aps.org/prxquantum/a... for more on her actual work...
#Contextuality #QuantumThermodynamics
see journals.aps.org/prxquantum/a... for more on her actual work...
#Contextuality #QuantumThermodynamics
October 9, 2025 at 12:09 PM
Can't wait to drink contextual tea