I també a l'Erik Luszczak (GIQ) i a l'Ariadna Gómez del Pulgar (Grup de QCT, IFAE) la seva participació en el muntatge de la #bctUAB i en aquesta visita. I gràcies, sobretot, a les persones que hi heu assistit i ens heu acompanyat en aquest recorregut quàntic! @giq-bcn.bsky.social

🆕 La #bctUAB estrena la primera exposició del curs 2025-2026! 📌 “Ciència i tecnologies quàntiques: nous paradigmes d’informació per explorar la naturalesa” 📅 Fins al 21 d'octubre! 🔗 ddd.uab.cat/record/319733 #BibExposUAB @bibliotequesuab.bsky.social @uab.cat @giq-bcn.bsky.social

We are organizing a short course on Quantum Foundations at Universitat Autònoma de Barcelona funded by Catalonia Quantum Academy (CQA). Few spaces left! Apply before 20 August, 2025.

This week’s 3× feature: Alberto Rolandi & Julia Mathe (Atominstitut, TU Wien) on “Optimal Landauer Erasure in Finite-Time Thermo.” and “Estimating Entanglement Monotones of Perm. Invariant Spin States”, resp. Satoya Imai (LENS, Florence) on “Chiral Symmetries of Multiparticle Entanglement”. Thanks‼️

Today Joey Schindler presented a new definition of coarse-grained entropy that unifies key approaches and recovers many foundational results from statistical mechanics. Read more arxiv.org/abs/2503.15612 by Schindler, Strasberg, Galke, Winter, Jabbour

Last week’s cool seminars 📏 Arpan Das (GIQ) Universal time scalings of sensitivity in Markovian quantum metrology 🎱 Debarshi Das (UCL) A New Experimental Proposal to Test the Quantumness of a Large Mass 🫘Giuseppe Vitagliano (TU Wien) Many-body entanglement quantification with collective measurements

🤩 De dilluns 5 de maig a dimecres 7, deixa’t seduir per la quàntica als #QuantumDays a la @uab.cat de 12 a 14 h a la Sala d’Actes de la Facultat de Ciències amb investigadors de @icmabcsic.bsky.social @imb-cnm-csic.bsky.social @icn2.bsky.social, IFAE i més! 🐈 icmab.es/exploring-th...

Great talk by Raúl Morral Yepes (ex-GIQ undergrad now at TUM Munich) on “Optimal unitary disentanglers for fermionic Gaussian states (and how to use them to play games).”

Berta Casas from BSC gave this week’s GIQ seminar on Quantum Machine Learning with Group Structure ⚛️.

Beyond IID in Information Theory is currently held at UIUC, but already things are being put in place for next year's edition, at Institute for Advanced Study (Technical University of Munich) #BeyondIID13 #BIID13 #BeyondIID12 #BIID12 @TU_Muenchen @ias_tum

This week We had two nice seminars: Teruaki Nagasawa (Nagoya U) discussed Macroscopic states and operations: a generalized resource theory of coherence. Ricard Puig (EPFL) examined Barren plateaus & warm starts, shedding light on quantum loss landscapes and effective training strategies for VQA.

Bravissima Ilaria Svampa defended her PhD: “Representations of the p-adic three-dimensional rotation group: towards p-adic quantum computing.” 🎓✨ Supervised by S L’Innocente, S Mancini at UNICAM and A Winter (GIQ, UAB) A big step towards a great p-adic quantum future—wherever that may be! 😏 ⚛️

This week we had two seminars by Niklas Galke (GIQ PhD candidate) on Finitely correlated states; and by Tomás Fernández Martos (PhD candidate at ICFO and QUSIDE) on Security proof for randomness generation in vertical-cavity surface-emitting laser.

This Thursday, Llorenç Escolà from QuSoft, UvA joined us to talk about “Quantum Position Verification: Loss and Entanglement.”

New paper on arXiv🔥 How can many-body interactions boost quantum sensing to its limits? We show how to add controlled interactions in many-body probes to reach the highest precision limits in quantum metrology -- both for dynamical and steady states. scirate.com/arxiv/2412.0... #quantum

Huge congratulations to Martí Perarnau-LLobet, the newest member of GiQ! Recently arrived as a RyC fellow, won the Spanish Royal Physics Society Award for Young Researcher in Theoretical Physics and he just secured a 1M€ ATRAE project grant! Això se’n diu arribar i moldre, Martí. Felicitats🚀 👏 !

As a kid, were you fascinated by fractals, went on to study science, but ended up doing "only" information theory or quantum physics? Rejoice, here is our communication-capacity-fractal-dimension crossover (improved v2)! @TU_Muenchen @ias_tum

Beyond IID in Information Theory is currently held at UIUC, but already things are being put in place for next year's edition, at Institute for Advanced Study (Technical University of Munich) #BeyondIID13 #BIID13 #BeyondIID12 #BIID12 @TU_Muenchen @ias_tum

Finally out, "Women for Quantum - Manifesto of Values" by more than 30 women in quantum science, including Anna Sanpera from @GIQ_BCN and Verónica Ahufinger from the Optics Group @UABBarcelona #w4q #womenforquantum #quantumphysics

Seth Lloyd lecturing on Quantum Information Processing with Continuous Variables - showing that John von Neumann invented the quantum phase estimation algorithm. @IMAG_UGR @BIRS_Math

A. Winter (with A. Winter, A. Winter and A. Winter) just released “Is Winter Coming?” @GIQ_BCN @ias_tum @QUIRCK

From the people who tend to look down on "curiosity-driven" research, sure enough we get a bit of money-driven research. In that world, given that google evidently hasn't got the brain power to solve the problem, it's only rational to farm it out.

Applications now open to join the𝗠𝗮𝘀𝘁𝗲𝗿'𝘀 𝗶𝗻 𝗤𝘂𝗮𝗻𝘁𝘂𝗺 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 & 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝘆 @ Barcelona . Admissions on a rolling basis monthly, starting March. Register to the online info session on Feb 26th at 3pm at

PhD and Postdoc positions @GIQ_BCN (tight deadlines!)

Yesterday, Matías Bilkis defended his PhD thesis “Decision-making in quantum environments: from model-free to model-aware learning of quantum controls” before R. Zambrani, Z. Holmes and G. Sentis. Felicidades Dr Bilkis ! Nice defense, awesome celebration 🥁🎻🥘🍾🎊!

New edition of “Bojos per la Física (Quàntica)” (Mad for Physics @PedreraCiencia) at GIQ @UABBarcelona: intense morning learning quantum physics 101, public-key and quantum-key distribution, and Bell's test. Gràcies als 25 bojos i boges ⚛️! #WorldQuantumDay @DigiQMaster

GIQ repudiates all forms of harassment and stands in solidarity with the victims. We are distressed by how UAB rector's office has handled recent cases occurring at our university. We must take action to create a safe and respectful environment for all.

Bravissimo Dr. Carlo Marconi! The world of quantum knows a ton more about the distinguished features of indistinguishable particles. PhD thesis successfully defended in front of the tribunal of Profs Chruscinski, Lewenstein and Bagan. Kudos also to his supervisor Prof Sanpera!

This week we had two visitors: M Rosati (ex-GIQui now @ Roma Tre U) and B Bergh (U of Cambridge). We enjoyed their talks ‘A learning theory for quantum photonic processors and beyond’ and ‘Parallel and Adaptive Quantum Channel Discrimination with Simple and Composite Hypotheses🎄

Today Ilaria Svampa (joint PhD candidate Camerino U + UAB-GIQ) gave us a wonderful talk on p-adic quantum mechanics entitled “Towards p-adic quantum bits via representations of the p-adic group of rotations SO(3)ₚ”.

Dr. Paul Erker received (with some delay) the UAB PhD thesis award. Felicitats Pauli 🥳! Some of the work in this thesis was recently covered in this quantamagazine article:

Paralysed by the uncertain fate of Tweeter, GIQ hasn’t tweeted in a while. Now, as Titanic's musicians, GIQ proudly crows the speakers we had this autumn 🧵

More snapshots from Anna's memorable birthday celebration!

This week Zhen-Peng Xu (U of Siegen) visited GIQ, and gave the talk ‘Quantum networks cannot generate graph states with high fidelity’.

Special day for the Master in Quantum Science & Technology in Barcelona: First cohort of graduates (@UniBarcelona, @UAB,@ICFOnians,@la_UPC,@IFAE,@QUANTIC_BSC )! Farewell to ready to fly Q-Masters and welcome to new promotion birds!

This week we had Paul Erker from IQOQI (Vienna) talking on ‘Measuring the thermodynamic cost of timekeeping”. Gracias por la visita Pauli!

Jordi Tura from LION@Leiden is visiting us this week. In the pict Dr. Tura is about to reach his ground state.

Today we enjoyed a nice talk by Manab Bera (IISER, Mohali): Does Quantum Bayes' Rule Affirm Consistency in Measurement Inferences in Quantum Mechanics?

Giqui Andreas Winter receives a Humboldt Research Award to collaborate with quantum colleagues at TU Munich @UABBarcelona @AvHStiftung @TU_Muenchen

GIQ’s M.S. along with fellow researchers at S. Morelli, N. Friis and D. Sauerwein, show how to increase the yield of multi-partite entangled states, distributed through noisy channels, by merging probabilistic entanglement conversion protocols with Bayesian estimation methods.

Proud to announce publication of "Activation of indistinguishability-based quantum coherence..." by giqui Andreas Winter and ex-giqui Ludovico Lami with Hefei and Palermo colleagues in PNAS 🍆 @PNASNews

Today, Victor Gaspar (GMV @infoGMV_es ) giving us a talk on ‘Quantum technologies from a business perspective’!

GIQuis Marco Fanizza and Anna Sanpera at the Quantum Career Symposium organized by Master in Quantum Science and Technology Barcelona. 👏🏻

Thanks Zuzana Gavorova (Hebrew U of Jerusalem) for the inspiring talk on 'Topological obstructions to implementing basic tasks' at today's GIQ seminar.

Today, we had Chun-Yun Hsieh (ICFO) talking about Dynamical Resource Theories and Their Applications. Great overview and cool applications !

Today we had our first GIQ extinction-aware round-table! Philipp introduced “The psychology of climate inaction” by Kate Jeffery that preceded the discussion

Today, Dr. Esteban Martínez-Vargas successfully defended his PhD in front of the committee: S. Croke (U Glasgow), J. de Vicente (U Carlos III, Madrid) and E. Bagan (@GIQ_BCN). Congratulations to Esteban and his supervisors Ramon Muñoz-Tapia and Gael Sentis @gueygel !🎓🍾

Prospective PhD student Jelena Mackeprang (U of Stuttgart) gave an interesting talk “Quantum Correlations for Computation” on finding signatures of quantum non-locality in a computational framework.

Fresh out of the presses, GIQ is proud to announce Philipp Strasberg's book "Quantum Stochastic Thermodynamics: Foundations and Selected Applications". Congrats Philipp 📕🍾!

GIQui Alonso Viladomat giving us a nice intro to Category theory and Resource theories.