María Gragera Garcés
@grageragarces.github.io
Building distributed quantum systems
PhD student in quantum @Uni of Edinburgh
Quantum, Food and Books
Previously: Quantinuum, IBM Q & Cisco R&D
Also find me in : https://linktr.ee/grageragarces
PhD student in quantum @Uni of Edinburgh
Quantum, Food and Books
Previously: Quantinuum, IBM Q & Cisco R&D
Also find me in : https://linktr.ee/grageragarces
Pinned
go.bsky.app/75SvR2M - Who am I missing?
~got bored this afternoon, do forgive me. But on a serious note would love to know who I haven't discovered on here yet (or mistakenly omitted due to the sheer amount of people)
~got bored this afternoon, do forgive me. But on a serious note would love to know who I haven't discovered on here yet (or mistakenly omitted due to the sheer amount of people)
My newest blog post: a short rant about how two adjacent communities are using the word non-local gate and we’re all getting very confused: grageragarces.github.io/dqc_articles...
Non-local gates are better in some architectures!
grageragarces.github.io
October 3, 2026 at 9:22 AM
My newest blog post: a short rant about how two adjacent communities are using the word non-local gate and we’re all getting very confused: grageragarces.github.io/dqc_articles...
Reposted by María Gragera Garcés
They did it? wow! blog.arxiv.org/2026/10/01/u...
October 1, 2026 at 9:00 PM
They did it? wow! blog.arxiv.org/2026/10/01/u...
New physics world article by yours truly:
Two superconducting qubits, separated by a metre of coaxial cable, can settle into an entangled state by being exposed to the same quantum-correlated microwave field. 🧪⚛️ physicsworld.com/a/noise-that...
Noise that entangles may accelerate the dawn of quantum technologies – Physics World
Two superconducting qubits, a metre of cable apart, have been driven into an entangled state not in spite of their environment, but by it
physicsworld.com
September 8, 2026 at 6:12 AM
New physics world article by yours truly:
Finally back in Edinburgh for Fringe. Saw shitfaced Shakespeare. Quite fun. The premise is that one of the classically trained actors in the play is indeed shitfaced and the others must adapt the play to their whims whilst trying to stay serious. We somehow ended up with a puppet father in Hamlet.
August 11, 2026 at 6:57 AM
Finally back in Edinburgh for Fringe. Saw shitfaced Shakespeare. Quite fun. The premise is that one of the classically trained actors in the play is indeed shitfaced and the others must adapt the play to their whims whilst trying to stay serious. We somehow ended up with a puppet father in Hamlet.
I'm in Paris this week visiting VeriQloud! If you're working in the Paris quantum ecosystem and would like to meet up for a coffee and/or show me your awesome quantum lab, message me! I'd love to visit some of the many people working on fantastic projects around the city, despite the heat.
July 28, 2026 at 1:34 PM
I'm in Paris this week visiting VeriQloud! If you're working in the Paris quantum ecosystem and would like to meet up for a coffee and/or show me your awesome quantum lab, message me! I'd love to visit some of the many people working on fantastic projects around the city, despite the heat.
On a brilliant twist of fate I met the engineers running eduroam a couple of weeks ago. Felt like meeting superstars, & fun fact Helsinki is apparently not the only airport with eduroam! Others include Stockholm and Luxembourg. Even they are amazed and how well the project has gone down since 2002
July 21, 2026 at 5:20 PM
On a brilliant twist of fate I met the engineers running eduroam a couple of weeks ago. Felt like meeting superstars, & fun fact Helsinki is apparently not the only airport with eduroam! Others include Stockholm and Luxembourg. Even they are amazed and how well the project has gone down since 2002
New short paper exploring how variational quantum circuits (a type of QML circuit) can be either trainable, cut affordably, or non-simulable, but probably not all three.
Another reason not to distribute through classical channels: scirate.com/arxiv/2607.1...
Another reason not to distribute through classical channels: scirate.com/arxiv/2607.1...
scirate.com
July 21, 2026 at 5:03 PM
New short paper exploring how variational quantum circuits (a type of QML circuit) can be either trainable, cut affordably, or non-simulable, but probably not all three.
Another reason not to distribute through classical channels: scirate.com/arxiv/2607.1...
Another reason not to distribute through classical channels: scirate.com/arxiv/2607.1...
Latest painting (by numbers)
July 18, 2026 at 8:25 PM
Latest painting (by numbers)
Do you live in the UK? Register to donate stem cells to help blood cancer patients: www.dkms.org.uk
DKMS UK
We are fighting blood cancer. We want as many people as possible to join the blood stem cell donor register.
www.dkms.org.uk
July 18, 2026 at 7:22 PM
Do you live in the UK? Register to donate stem cells to help blood cancer patients: www.dkms.org.uk
Reposted by María Gragera Garcés
For the past 70 years, scientists have taught us that female mammals are born with a finite ovarian egg supply. In humans, that supply dwindles until menopause, when it goes bankrupt.
That dogma might be utterly wrong, new research suggests.
www.scientificamerican.com/article/the-...
That dogma might be utterly wrong, new research suggests.
www.scientificamerican.com/article/the-...
The biological dogma that women don’t make new eggs after birth may be wrong
Female mammals have long thought to be born with all the eggs they would ever have, but new research is challenging that consensus
www.scientificamerican.com
July 6, 2026 at 6:45 PM
For the past 70 years, scientists have taught us that female mammals are born with a finite ovarian egg supply. In humans, that supply dwindles until menopause, when it goes bankrupt.
That dogma might be utterly wrong, new research suggests.
www.scientificamerican.com/article/the-...
That dogma might be utterly wrong, new research suggests.
www.scientificamerican.com/article/the-...
Coseners was great, I missed cheese and british irony. Selling quantum to a room full of classical internet & communications architects went down quite well
July 4, 2026 at 6:12 PM
Coseners was great, I missed cheese and british irony. Selling quantum to a room full of classical internet & communications architects went down quite well
Such a pleasure to have participated at NUS’s HACKAMONTH this June! Beyond grateful to my co-hackers and the staff at Singapore’s Center of Quantum Tech, for an incredible month & wonderful collaborations! One of the papers written during this time is already out, but keep an eye out for more :)
June 27, 2026 at 1:05 AM
Such a pleasure to have participated at NUS’s HACKAMONTH this June! Beyond grateful to my co-hackers and the staff at Singapore’s Center of Quantum Tech, for an incredible month & wonderful collaborations! One of the papers written during this time is already out, but keep an eye out for more :)
I visited the first museum on the afterlife. Can now claim I have been to hell and back 😉
June 27, 2026 at 12:56 AM
I visited the first museum on the afterlife. Can now claim I have been to hell and back 😉
Some pictures of the orchid garden at the Singaporean botanical garden
June 20, 2026 at 2:29 PM
Some pictures of the orchid garden at the Singaporean botanical garden
New pre-print: a quantum ring all-reduce, the primitive behind large-scale ML training. We cut online communication, enable info-theoretically private aggregation, & show quadratic/exponential advantages on gradient-conflict problems.
scirate.com/arxiv/2606.2...
scirate.com/arxiv/2606.2...
Quantum ring all-reduce: communication and privacy advantages for distributed learning
Machine learning models have scaled to unprecedented sizes, making training across distributed devices the de facto standard in the field. In this work, we explore how quantum communications can make ...
scirate.com
June 19, 2026 at 2:19 AM
New pre-print: a quantum ring all-reduce, the primitive behind large-scale ML training. We cut online communication, enable info-theoretically private aggregation, & show quadratic/exponential advantages on gradient-conflict problems.
scirate.com/arxiv/2606.2...
scirate.com/arxiv/2606.2...
Yesterday I gave a short intro to Distributed Quantum Computing at the Center of Quantum tech in Singapore!
You can check out my (20 min long) dry run here: m.youtube.com/watch?v=xUrb...
You can check out my (20 min long) dry run here: m.youtube.com/watch?v=xUrb...
June 16, 2026 at 12:37 AM
Yesterday I gave a short intro to Distributed Quantum Computing at the Center of Quantum tech in Singapore!
You can check out my (20 min long) dry run here: m.youtube.com/watch?v=xUrb...
You can check out my (20 min long) dry run here: m.youtube.com/watch?v=xUrb...
In case you doubt why would distribution be useful for compute:
~ from arxiv.org/pdf/1802.05799
~ from arxiv.org/pdf/1802.05799
June 9, 2026 at 6:28 AM
In case you doubt why would distribution be useful for compute:
~ from arxiv.org/pdf/1802.05799
~ from arxiv.org/pdf/1802.05799
It would be very nice if quantum circuit benchmarking suites like MQTBench came with expected results for the circuits in 0 noise environments so that we can test against them. It's easy enough for things like W or GHZ generators but I have no clue what your Grover implementation was converging on
June 9, 2026 at 4:29 AM
It would be very nice if quantum circuit benchmarking suites like MQTBench came with expected results for the circuits in 0 noise environments so that we can test against them. It's easy enough for things like W or GHZ generators but I have no clue what your Grover implementation was converging on
Having a great time in sunny Singapore during the first week of CQT’s HACKMONTH
June 5, 2026 at 7:16 AM
Having a great time in sunny Singapore during the first week of CQT’s HACKMONTH
I find this mildly entertaining
June 2, 2026 at 11:14 AM
I find this mildly entertaining
I’ll be at the Center of Quantum Tech in the National University if Singapore t’ill late June. Reach out if you’re around!
June 2, 2026 at 9:37 AM
I’ll be at the Center of Quantum Tech in the National University if Singapore t’ill late June. Reach out if you’re around!
Reposted by María Gragera Garcés
I have a few things to plug so I guess this needs to be a thread.
First: new paper!
What if instead of designing quantum software with H's in boxs and of weird things, what if you just play whack-a-mole with a managable set of variables.
Turns out it works!
scirate.com/arxiv/2605.2...
First: new paper!
What if instead of designing quantum software with H's in boxs and of weird things, what if you just play whack-a-mole with a managable set of variables.
Turns out it works!
scirate.com/arxiv/2605.2...
Cute Cat Plays Whack-A-Mole Game
ALT: Cute Cat Plays Whack-A-Mole Game
static.klipy.com
May 29, 2026 at 2:04 PM
I have a few things to plug so I guess this needs to be a thread.
First: new paper!
What if instead of designing quantum software with H's in boxs and of weird things, what if you just play whack-a-mole with a managable set of variables.
Turns out it works!
scirate.com/arxiv/2605.2...
First: new paper!
What if instead of designing quantum software with H's in boxs and of weird things, what if you just play whack-a-mole with a managable set of variables.
Turns out it works!
scirate.com/arxiv/2605.2...
Interested in what resource estimation for minimisation looks like in DQC? Well I have a new blog post: grageragarces.github.io/dqc_articles...
What can you tune?
grageragarces.github.io
May 30, 2026 at 1:55 PM
Interested in what resource estimation for minimisation looks like in DQC? Well I have a new blog post: grageragarces.github.io/dqc_articles...
1/2 After a week of causality lectures and explanations over sake and whiskey I think I’m starting to get it:
May 29, 2026 at 5:56 PM
1/2 After a week of causality lectures and explanations over sake and whiskey I think I’m starting to get it:
Lovely ride to the Isle of Skye today for the QI spring school
May 25, 2026 at 9:24 PM
Lovely ride to the Isle of Skye today for the QI spring school