Álvaro M. Alhambra
@alvalhambra.bsky.social
Quantum physicist. Will apply Cauchy-Schwarz for food.
Fun fact: yesterday I gave an outreach talk and when presenting Shor's algorithm I had 24=6×2×2 as an example of prime factoring
November 7, 2025 at 8:28 AM
Fun fact: yesterday I gave an outreach talk and when presenting Shor's algorithm I had 24=6×2×2 as an example of prime factoring
This is a fantastic essay and I wonder how much if it directly translates into science (e.g. paper writing as opposed to paper reading these days) danioffline.substack.com/p/everyone-w...
everyone wants to be a DJ, no one wants to dance
This is not an essay about nightlife, not exclusively.
danioffline.substack.com
October 28, 2025 at 6:02 PM
This is a fantastic essay and I wonder how much if it directly translates into science (e.g. paper writing as opposed to paper reading these days) danioffline.substack.com/p/everyone-w...
The quant-ph arXiv is on FIRE today 🔥 🔥🔥
October 9, 2025 at 3:32 AM
The quant-ph arXiv is on FIRE today 🔥 🔥🔥
A non-physicist friend of mine just today made 10k selling IonQ shares, great times for QC!
September 25, 2025 at 8:42 AM
A non-physicist friend of mine just today made 10k selling IonQ shares, great times for QC!
Shamelessly stealing this image for every single time I have to explain the Fourier transform in the future
At 26, during the Reign of Terror in France, Jean-Baptiste Joseph Fourier narrowly avoided the guillotine. A decade later, he made a discovery that changed mathematics forever. @shalmawegs.bsky.social reports:
www.quantamagazine.org/what-is-the-...
www.quantamagazine.org/what-is-the-...
What Is the Fourier Transform? | Quanta Magazine
Amid the chaos of revolutionary France, one man’s mathematical obsession gave way to a calculation that now underpins much of mathematics and physics. The calculation, called the Fourier transform, de...
www.quantamagazine.org
September 5, 2025 at 8:54 AM
Shamelessly stealing this image for every single time I have to explain the Fourier transform in the future
Trying to fit this in my next grant application
August 23, 2025 at 1:19 PM
Trying to fit this in my next grant application
Completely abhorred by the correct spelling being "simulatability" and not "simulability".
July 23, 2025 at 7:09 AM
Completely abhorred by the correct spelling being "simulatability" and not "simulability".
The most interesting idea I've learnt this week: arxiv.org/abs/2311.10304
In a dissipative setting, if one takes the thermodynamic limit first and then the limit of zero dissipation, you are left with a Liouvillian gap related to the relaxation of the closed system dynamics
In a dissipative setting, if one takes the thermodynamic limit first and then the limit of zero dissipation, you are left with a Liouvillian gap related to the relaxation of the closed system dynamics
Liouvillian-gap analysis of open quantum many-body systems in the weak dissipation limit
Recent experiments have reported that novel physics emerge in open quantum many-body sys- tems due to an interplay of interactions and dissipation, which stimulate theoretical studies of the many-body...
arxiv.org
July 11, 2025 at 11:58 AM
The most interesting idea I've learnt this week: arxiv.org/abs/2311.10304
In a dissipative setting, if one takes the thermodynamic limit first and then the limit of zero dissipation, you are left with a Liouvillian gap related to the relaxation of the closed system dynamics
In a dissipative setting, if one takes the thermodynamic limit first and then the limit of zero dissipation, you are left with a Liouvillian gap related to the relaxation of the closed system dynamics
One more day, one more chance to pretend that I understand the word "topological"
July 11, 2025 at 11:40 AM
One more day, one more chance to pretend that I understand the word "topological"
Reposted by Álvaro M. Alhambra
I am very happy to announce that my first published article „Rapid Thermalization of Dissipative Many-Body Dynamics of Commuting Hamiltonians“ is now published in Communications in Mathematical Physics.
rdcu.be/euy1Y
I feel honored and humbled to have been accepted in such a prestigious journal.
rdcu.be/euy1Y
I feel honored and humbled to have been accepted in such a prestigious journal.
Rapid Thermalization of Dissipative Many-Body Dynamics of Commuting Hamiltonians - Communications in Mathematical Physics
Quantum systems typically reach thermal equilibrium rather quickly when coupled to a thermal environment. The usual way of bounding the speed of this process is by estimating the spectral gap of the d...
link.springer.com
July 3, 2025 at 4:26 PM
I am very happy to announce that my first published article „Rapid Thermalization of Dissipative Many-Body Dynamics of Commuting Hamiltonians“ is now published in Communications in Mathematical Physics.
rdcu.be/euy1Y
I feel honored and humbled to have been accepted in such a prestigious journal.
rdcu.be/euy1Y
I feel honored and humbled to have been accepted in such a prestigious journal.
I have many opinions on scientific writing and one of them is that we should typically aim to do better than "closing a gap" in the literature
July 2, 2025 at 4:00 AM
I have many opinions on scientific writing and one of them is that we should typically aim to do better than "closing a gap" in the literature
A bit overwhelmed by how hard it is to keep track of results I want to learn about
July 2, 2025 at 3:28 AM
A bit overwhelmed by how hard it is to keep track of results I want to learn about
In a new work, we show both numerically and analytically how expectations values of long-range models are robust to imperfections in the underlying Hamiltonian arxiv.org/abs/2506.16451
Stability of thermal equilibrium in long-range quantum systems
Experimental realizations of spin models are irremediably prone to errors, which can propagate through the system corrupting experimental signals. We study how such errors affect the measurement of lo...
arxiv.org
June 24, 2025 at 8:12 AM
In a new work, we show both numerically and analytically how expectations values of long-range models are robust to imperfections in the underlying Hamiltonian arxiv.org/abs/2506.16451
Is it normal in some areas to cite papers in talks as [senior author] et al.? I saw it done recently and it seems kinda bad
Personalized Emails and URLs
Personalized Emails and URLs
normal.in
June 16, 2025 at 7:28 AM
Is it normal in some areas to cite papers in talks as [senior author] et al.? I saw it done recently and it seems kinda bad
Counting the days down to the point at which we'll have more whitepapers and roadmaps than actual papers
June 9, 2025 at 9:59 AM
Counting the days down to the point at which we'll have more whitepapers and roadmaps than actual papers
Spotted on the wild (arXiv) this week
June 2, 2025 at 12:07 PM
Spotted on the wild (arXiv) this week
New paper today! Very excited to announce we obtain, from first principles, a quantum master equation that both applies in the many-body regime and provably converges to the exact Gibbs state: arxiv.org/abs/2505.20064
Thermalization in open many-body systems and KMS detailed balance
Starting from a microscopic description of weak system-bath interactions, we derive from first principles a quantum master equation that does not rely on the well-known rotating wave approximation. Th...
arxiv.org
May 27, 2025 at 9:04 AM
New paper today! Very excited to announce we obtain, from first principles, a quantum master equation that both applies in the many-body regime and provably converges to the exact Gibbs state: arxiv.org/abs/2505.20064
The single biggest threat to my and many other's scientific work is Madrid's government attack on public education, today we march against it!
May 22, 2025 at 4:52 PM
The single biggest threat to my and many other's scientific work is Madrid's government attack on public education, today we march against it!
My favourite trait of scientific writing is the shameless overuse of the word "framework"
May 16, 2025 at 4:01 PM
My favourite trait of scientific writing is the shameless overuse of the word "framework"
When public documents appear on national quantum tech etc usually drafted by public servants with a mixed background....who are they asking for advice?
May 8, 2025 at 11:35 AM
When public documents appear on national quantum tech etc usually drafted by public servants with a mixed background....who are they asking for advice?
Very excited to show the first paper of my first PhD student! We prove that long-range models have well-behaved partition functions at high temperatures (despite being all-to-all coupled!), and we build sub-exponential time classical algorithms for their approximation: arxiv.org/abs/2504.20901
High-temperature partition functions and classical simulability of long-range quantum systems
Long-range quantum systems, in which the interactions decay as $1/r^α$, are of increasing interest due to the variety of experimental set-ups in which they naturally appear. Motivated by this, we stud...
arxiv.org
April 30, 2025 at 8:20 AM
Very excited to show the first paper of my first PhD student! We prove that long-range models have well-behaved partition functions at high temperatures (despite being all-to-all coupled!), and we build sub-exponential time classical algorithms for their approximation: arxiv.org/abs/2504.20901
We are excited to announce the workshop "Entangle This VI" that we are organizing on quantum science and technology in Madrid, 15th-19th September 2025. Registration and abstract submission is currently open! indico.ift.uam-csic.es/event/27/
February 21, 2025 at 10:48 AM
We are excited to announce the workshop "Entangle This VI" that we are organizing on quantum science and technology in Madrid, 15th-19th September 2025. Registration and abstract submission is currently open! indico.ift.uam-csic.es/event/27/
Reposted by Álvaro M. Alhambra
Hello everyone! I thought I could use my first post here to report on a great meeting that our QuantERA project "TouQan: Towards a useful quantum advantage" has had this week at DAMTP in Cambridge, UK. A full week of stimulating discussions, lots of fun, and quite some progress on the project!
February 15, 2025 at 7:39 PM
Hello everyone! I thought I could use my first post here to report on a great meeting that our QuantERA project "TouQan: Towards a useful quantum advantage" has had this week at DAMTP in Cambridge, UK. A full week of stimulating discussions, lots of fun, and quite some progress on the project!
Reposted by Álvaro M. Alhambra
We have created a "Job market" database for quantum related job offers in Spain. Anyone interested in testing it and using it, please let me know. Still in "beta" phase and ironing out the details.
PhD position. Theory of open quantum systems, decoherence, and quantum thermodynamics https://www.cuantica2025.es/job-market
February 4, 2025 at 11:11 PM
We have created a "Job market" database for quantum related job offers in Spain. Anyone interested in testing it and using it, please let me know. Still in "beta" phase and ironing out the details.
For the last week I really feel like I've really been doing the real Science™ (a.k.a. selling my personal brand to a hiring committee)
February 4, 2025 at 5:46 PM
For the last week I really feel like I've really been doing the real Science™ (a.k.a. selling my personal brand to a hiring committee)