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Searching for a wrinkle in space-time
A wrinkle in space-time
“A wrinkle in space-time” project is dedicated to experimental searches for signatures of quantum gravity using gamma rays of very high energy.
News
- New team members: Christian Pfeifer and Maykoll Reyes HungOur team has two new members from this academic year: associate professor Christian Pfeifer and postdoctoral researcher Maykoll Anthonny Reyes Hung. Welcome! Christian Pfeifer obtained his PhD in 2013 at the II Institute for Theoretical Physics of the University of Hamburg, with the thesis “The Finsler Spacetime Framework: Backgrounds For Physics Beyond Metric Geometry”. He… Read more: New team members: Christian Pfeifer and Maykoll Reyes Hung
- Invited plenary talk at TeVPA 2026Tomislav Terzić gave an invited plenary talk on “Fundamental physics with IACTs and future prospects in the field” at the TeV Particle Astrophysics conference (TeVPA 2026), held from 30th of August to 4th of September 2026 in Tendo, Japan. This year’s edition was organised by Chiba University.
- Invited talk at the Ljubljana RQI WorkshopTomislav Terzić gave an invited talk on “Astrophysical tests of Quantum Gravity” at the Ljubljana RQI Workshop on Gravitational Quantum Physics and Metrology, held from 10th to 13th of August 2026 in Ljubljana, Slovenia. The workshop gathered researchers working on the effects of gravity on quantum systems, gravitational decoherence, and quantum metrology. It is the… Read more: Invited talk at the Ljubljana RQI Workshop
- Invited talk at “From 9 to 40” in SextenTomislav Terzić gave an invited talk on “Searching for LIV effects with SSTs” at the conference “From 9 to 40: the SST Telescopes and Gamma-Ray Science with ASTRI and CTAO”, held from 20th to 24th of July 2026 in Sexten, Italy. The conference was dedicated to the Small-Sized Telescopes (SST) of the future CTAO observatory… Read more: Invited talk at “From 9 to 40” in Sexten
- HRZZ approves the CALYPSO projectThe Croatian Science Foundation (HRZZ) approved the research project “Precision simulations and calibration for tests of Lorentz invariance with extensive air showers” (CALYPSO, IP-2026-8139), led by Tomislav Terzić, within the call Research Projects (IP-2026p, the results of the call). The project will run from 2026 to 2029 with a budget of 199.525,00 EUR. CALYPSO aims… Read more: HRZZ approves the CALYPSO project
- Second Annual Conference of the BridgeQG COST Action – BridgeQG 2026Jelena Strišković and Tomislav Terzić participated in the second annual conference of the COST Action CA23130 BridgeQG, “Bridging High and Low Energies in Search of Quantum Gravity 2026”, which took place from 6th to 9th of July 2026 in Varna, Bulgaria. Tomislav Terzić gave a talk on “LIV-modified gamma-ray absorption: Lessons from GRB 221009A”, based… Read more: Second Annual Conference of the BridgeQG COST Action – BridgeQG 2026
- New paper in Physics of the Dark UniversePaper “Is there new physics beyond 30 TeV in the BOAT?” (DOI: 10.1016/j.dark.2026.102389) was published in Physics of the Dark Universe. The authors are Filip Reščić, Luis Recabarren Vergara, Michele Doro (University of Padova), and Tomislav Terzić. The paper can also be found in ArXiv: 2511.15542. BOAT (brightest of all time) refers to GRB 221009A,… Read more: New paper in Physics of the Dark Universe
- Second BridgeQG Training School in BelgradeFilip Reščić, Jelena Strišković, and Tomislav Terzić participated in the second Training School of the COST Action CA23130 BridgeQG (Bridging high and low energies in search of quantum gravity), “Quantum and classical gravity in low-energy quantum systems”, held in Belgrade, Serbia, from 22nd to 26th of June 2026. Tomislav Terzić was one of the organisers… Read more: Second BridgeQG Training School in Belgrade
- HRZZ approves the postdoctoral project of Maykoll Reyes HungThe Croatian Science Foundation (HRZZ) approved the postdoctoral research project of Maykoll Anthonny Reyes Hung, “Collinear Approximation of Photon Interactions in a Consistent Lorentz-Violating Extension”, within the call PDIP-2026 (Postdoctoral Research Projects). The results of the call were published on 1st of June 2026. The project will be carried out at the Faculty of Physics… Read more: HRZZ approves the postdoctoral project of Maykoll Reyes Hung
- Tomislav Terzić takes over as Physics Coordinator of the CTAO-LST CollaborationOn 1st of April 2026, Tomislav Terzić took over as Physics Coordinator of the CTAO-LST Collaboration, which develops and operates the Large-Sized Telescopes (LST) that will be part of the Cherenkov Telescope Array Observatory (CTAO). He previously served as the Deputy Physics Coordinator. LST-1, the prototype located at the CTAO-North site on La Palma, has… Read more: Tomislav Terzić takes over as Physics Coordinator of the CTAO-LST Collaboration
- Time Allocation Committee of CTAO-LST and MAGIC in RijekaMarina Manganaro and Tomislav Terzić organised the meeting of the Time Allocation Committee (TAC), the committee that evaluates observation proposals and allocates observation time on the CTAO-LST and MAGIC telescopes. The meeting took place from 24th to 27th of February 2026 in the InnovaLab at the University Campus Trsat in Rijeka. Both were also members… Read more: Time Allocation Committee of CTAO-LST and MAGIC in Rijeka
- BridgeQG Workshop in AnnecyThe BridgeQG Workshop “Bridging High-Energy Astrophysical Modelling and Lorentz Invariance Violation Studies” (website) took place from 4th to 6th of February 2026 at the Laboratoire d’Annecy de Physique des Particules (LAPP) in Annecy, France. The workshop was partly funded by the COST Action CA23130 BridgeQG. Filip Reščić and Tomislav Terzić were members of the Scientific… Read more: BridgeQG Workshop in Annecy
- New paper in Monthly Notices of the Royal Astronomical SocietyPaper “First detection of VHE gamma-ray signal from the FSRQ TON 0599” (DOI: 10.1093/mnras/stag032) by the MAGIC Collaboration was published in Monthly Notices of the Royal Astronomical Society. Tomislav Terzić is the lead and one of the corresponding authors. The paper can also be found in ArXiv: 2601.03873. TON 0599 is a flat spectrum radio… Read more: New paper in Monthly Notices of the Royal Astronomical Society
- 2nd LST+MAGIC F2F Science MeetingThe 2nd LST+MAGIC F2F Science Meeting took place from 17th to 21st of November 2025 at the Instituto de Astrofísica de Andalucía in Granada, Spain. Tomislav Terzić participated as the Deputy Physics Coordinator of the CTAO-LST collaboration and was one of the organisers of the meeting. The CTAO-LST and MAGIC collaborations operate Cherenkov telescopes at… Read more: 2nd LST+MAGIC F2F Science Meeting
- Visit to the University of ZaragozaFilip Reščić and Tomislav Terzić visited their collaborators at the University of Zaragoza (UNIZAR) to discuss the continuation of the collaboration after two published papers (Carmona et al., 2024 and Carmona et al., 2025). The collaboration started within the COST Action QG-MM, led by José Manuel Carmona from UNIZAR, and continued through the doctoral studies… Read more: Visit to the University of Zaragoza
- 20th TeV Particle Astrophysics Conference (TeVPA 2025)Tomislav Terzić participated in the TeV Particle Astrophysics conference (TeVPA 2025), which took place from 3rd to 7th of November 2025 in Valencia, Spain. This was the 20th edition of the conference, first held in 2005 at Fermilab. Tomislav Terzić gave a talk on “First Lorentz Invariance Violation constraint from a cooperation of Imaging Atmospheric… Read more: 20th TeV Particle Astrophysics Conference (TeVPA 2025)
- STSM @ University of L’AquilaTomislav Terzić carried out a Short-Term Scientific Mission (STSM) at the Department of Physical and Chemical Sciences of the University of L’Aquila, where he was hosted by Denise Boncioli and Francesco Salamida. The mission titled “Influence of QG phenomenological models on particle shower development” focused on comparing the Lorentz invariance violation (LIV) studies using cosmic… Read more: STSM @ University of L’Aquila
- 39th International Cosmic Ray Conference (ICRC 2025)Tomislav Terzić participated in the 39th International Cosmic Ray Conference (ICRC 2025), which took place from 15th to 24th of July 2025 in Geneva, Switzerland. He gave a talk on “Searching for Lorentz invariance violation with artificial neural networks”, presenting results of the ANN-VIL project. The conference proceedings were published in Proceedings of Science, PoS(ICRC2025).
- New paper in Journal of Cosmology and Astroparticle PhysicsPaper “Photon Absorption in a Doubly Special Relativity Model with Undeformed Free Propagation and Total Momentum Conservation” (DOI: 10.1088/1475-7516/2025/07/066) was published in Journal of Cosmology and Astroparticle Physics. The authors are J. M. Carmona, J. L. Cortés, F. Reščić, M. A. Reyes, and T. Terzić. The paper can also be found in ArXiv: 2503.15203. In… Read more: New paper in Journal of Cosmology and Astroparticle Physics
- First Annual Conference of the BridgeQG COST Action – BridgeQG 2025Filip Reščić, Jelena Strišković, and Tomislav Terzić participated in the first annual conference “Bridging high and low energies in search of quantum gravity 2025” (BridgeQG 2025), organised by COST Action CA23130 BridgeQG. The conference took place from 7th to 10th of July 2025 on the Jussieu campus of the Sorbonne Faculty of Science and Engineering… Read more: First Annual Conference of the BridgeQG COST Action – BridgeQG 2025
- Jelena Strišković defended her doctoral thesisOn 27th of June 2025, Jelena Strišković successfully defended her doctoral thesis entitled “Study of active galactic nuclei variability and Lorentz invariance violation with MAGIC and LST-1 telescopes” at the Faculty of Physics (FIZRI) of the University of Rijeka. The thesis was supervised by Tomislav Terzić (FIZRI) and co-supervised by Dijana Dominis Prester (FIZRI) and… Read more: Jelena Strišković defended her doctoral thesis
- Tomislav Terzić selected as Deputy Physics Coordinator of the CTAO-LST CollaborationTomislav Terzić was selected as Deputy Physics Coordinator of the CTAO-LST collaboration, which develops and operates the Large-Sized Telescopes (LST) of the Cherenkov Telescope Array Observatory (CTAO). He took on the role during the LST collaboration meeting held from 19th to 23rd of May 2025 at CIEMAT in Madrid, Spain. The physics coordination facilitates communication… Read more: Tomislav Terzić selected as Deputy Physics Coordinator of the CTAO-LST Collaboration
- Workshop “Quantum Systems in Free Fall”The workshop “Quantum Systems in Free Fall” (website) took place from 6th to 8th of May 2025 at the Center of Applied Space Technology and Microgravity (ZARM) of the University of Bremen, Germany. The workshop was organised jointly by two COST Actions: BridgeQG (CA23130, Bridging high and low energies in search of quantum gravity) and… Read more: Workshop “Quantum Systems in Free Fall”
- Bad Honnef Physics School “Searching for Quantum Gravity in the Sky”The Bad Honnef Physics School “Searching for Quantum Gravity in the Sky” took place from 16th to 21st of February 2025 at the Physikzentrum Bad Honnef in Germany. The school was organised by the Deutsche Physikalische Gesellschaft (DPG) and the BridgeQG – COST Action CA23130 as its first Training School. It brought together around 80… Read more: Bad Honnef Physics School “Searching for Quantum Gravity in the Sky”
- Angelo Zec received an award for the best master thesis at the Faculty of Physics in 2023On 8th of November, the Faculty of Physics of the University of Rijeka celebrated its anniversary. On that occasion, the faculty dean, Rajka Jurdana-Šepić presented awards, appreciation certificates, and acknowledgements. Angelo Zec received an award for the best master thesis defended at the Faculty of Physics in 2023. From the award justification: Angelo Zec defended… Read more: Angelo Zec received an award for the best master thesis at the Faculty of Physics in 2023
- 9th edition of Roma International Conference on AstroParticle Physics (RICAP-24)Tomislav Terzić participated in the 9th edition of the Roma International Conference on AstroParticle Physics (RICAP-24), which took place from 23th till 27th of September 2024 in Villa Tuscolana in Frascati, Italy. The conference was organized by the INFN and University of Roma Tor Vergata. Tomislav Terzić gave a talk on “Using artificial neural networks… Read more: 9th edition of Roma International Conference on AstroParticle Physics (RICAP-24)
- New paper in Physical Review DPaper “Approaches to photon absorption in a Lorentz invariance violation scenario” (DOI: 10.1103/physrevd.110.063035) was published in Physical Review D. Filip Reščić was one of the main authors. The paper can also be found in ArXiv: 2404.07842 In this work, we performed a complete and explicit calculation of the cross section for the γ-γ scattering in… Read more: New paper in Physical Review D
- Fifth annual conference on quantum gravity phenomenology in the multi-messenger era (QGMM24)Filip Reščić and Tomislav Terzić participated at the Fifth annual conference on quantum gravity phenomenology in the multi-messenger era (QGMM24, https://teorica.fis.ucm.es/QGMM24/). The conference took place on 15th-19th July 2024 at the Complutense University of Madrid (Spain), and was hosted by the “Instituto de Física de Partículas y del Cosmos” (IPARCOS). Filip Reščić delivered a talk… Read more: Fifth annual conference on quantum gravity phenomenology in the multi-messenger era (QGMM24)
- New paper in Journal of Cosmology and Astroparticle PhysicsPaper “Constraints on Lorentz invariance violation from the extraordinary Mrk 421 flare of 2014 using a novel analysis method” was published in Journal of Cosmology and Astroparticle Physics (DOI: 10.1088/1475-7516/2024/07/044). Jelena Strišković and Tomislav Terzić are among the main authors. The paper can also be found in ArXiv: 2406.07140. We invented a novel method to… Read more: New paper in Journal of Cosmology and Astroparticle Physics