Foreword
Dear Ion Trappers,
2025 has been officially declared the International Year of Quantum Science and Technology by the United Nations, marking the centenary of quantum mechanics and celebrating its transformative impact. We’re eager to hear about your projects and events – keep writing to us! You can visit the ITN website (https://iontraps.net/) to download current and archived issues and send us your submissions directly using the provided forms.
Online Seminars
Virtual Seminar on Precision Physics and Fundamental Symmetries – LINK: Thursdays
The “Virtual AMO Seminar” – LINK: Fridays, 7 pm (UTC)
The “Quantum Science Seminar” – LINK: Thursdays, 5 pm
Events
The Multiparameter Quantum Sensing and Metrology Seminar will be held at the Physics Center in Bad Honnef, Germany, from February 3 to 6, 2025. Details
The Winter School for Quantum Information Processing with Trapped Ions will take place in Hannover, Germany from February 24 to 28, 2025. Details
The 88th Annual Conference of the DPG and DPG Spring Meeting (SAMOP) will take place on the campus of the University of Bonn from March 9 to 14, 2025. Details
The 26th International Conference on Laser Spectroscopy (ICAPS March Meeting) will be held as a hybrid event online and in Anaheim, California from March 16 to 21, 2025. Details
The Joint Conference of the IEEE, IFCS & EFTF will be held in Querétaro, Mexico, from May 12 to 16, 2025. Details
The 10th International Conference on Precision Physics and Fundamental Physical Constants (FFK2025) will be held at the University of Warsaw in Poland from May 26 to 30, 2025. Details
The 26th International Conference on Laser Spectroscopy (ICOLS 2025) will take place on the Elba Island in Tuscany, Italy, from June 2 to 7, 2025. Details
2025 Atomic Physics GRC will be held at the Salve Regina University in Rhode Island, US, from June 15 to June 20, 2025. Details
The 56th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics (DAMOP) will be held in Portland, Oregon from June 16 to 20, 2025. Details
The 29th Central Europe Workshop on Quantum Optics (CEWQO29) will take place in Vilnius, Lithuania from June 23 to 27, 2025. Details
The 27th Laser World of Photonics will take place in Munich, Germany from June 24 to 27, 2025. Details
Summer school on the “Search for new physics with low-energy precision tests” will be held at the fletcher Hotel Ameland from June 29 to July 4, 2025. Details
The 15th European Conference on Atoms Molecules and Photons (ECAMP15) will take place in Innsbruck, Austria from June 30 to July 4 2025. Details
The 13th European Frequency and Time Seminar (EFTS) will be held in Besancon, France from June 30 to July 4, 2025. Details
FISMAT2025 – Quantum metrology and sensing with atoms, photons, and molecules will take place in Venice, Italy from July 6 to 11, 2025. Details
The Summer School on Quantum Matter out of Equilibrium will be held in Granada (Spain) from September 1 to 5, 2025. Details
Quantum Optics XI will take place in Kraków, Poland from September 1st to 5th 2025. Details
PSI2025 – Physics of fundamental Symmetries and Interactions will take place at the Paul Scherrer Institute, Switzerland from September 7 to 12, 2025. Details
European Conference on Trapped Ions (ECTI) will be held in the Netherlands from 8 to 12 September 2025. Details to follow.
The 2nd DPG Fall Meeting on Quantum Physics will take place in Göttingen, Germany from September 8 to 12, 2025. Details
International Conference on Atomic, Molecular, Optical and Nano Physics with Applications (IAMNOP-2025) will be held at the School of Physical Sciences of the Jawaharlal Nehru University (JNU) in New Delhi, India from Dec. 17 to 19, 2025.
Jobs
Postdoc Position in Trapped Ion Quantum Information available at the University of Amsterdam.
Details
Two postdoc positions available at the University of Oxford, developing and operating a many-node cavity-mediated networked quantum computer (MICRON-QC project). Posts are initially available for 2 years with the possibility of extension.
Contact: Dr Joe Goodwin (joseph.goodwin@physics.ox.ac.uk)
Details
IonQ is seeking an experienced ion trapper to work on ion trap technology in our College Park, MD, USA office. The position requires being on site in Maryland and authorization to work in the USA.
Contact: David Scherer at scherer@ionq.co
Details
Highly motivated PhD students and postdoctoral researchers are sought to join the experiments and theory team of the ERC Synergy project “Open 2D Quantum Simulator (OPEN-2QS)”, with the project starting on May 1st, 2025.Trapped ions excited to Rydberg states will be used to build a quantum simulator for open system quantum dynamics, enabling the study of novel states of matter like quantum glasses through fast interactions and long-time stability.
Contacts: Mainz (experiment), Ferdinand Schmidt-Kaler (fsk@uni-mainz.de)
Stockholm (experiment), Markus Hennrich (markus.hennrich@fysik.su.se)
Tübingen (theory), Igor Lesanovsky (igor.lesanovsky@uni-tuebingen.de)
Details
Contact: Clément Lacroûte, clement.lacroute@femto-st.fr
Details
A 3-year postdoc position available in collaboration with Prof. Steve Worm’s group at the DESYin Zeuthen to work on optical clocks
Contact: Steven Worm (steven.worm@desy.de).
Details
Several PostDoc and PhD positions available at PTB in Braunschweig and Leibniz University Hannover in the Quantum Logic Spectroscopy Group of Piet Schmidt . Topics include laboratory and transportable aluminium ion clocks, multi-ion calcium clock using dynamical decoupling and entanglement, as well as highly charged ion clocks.
Contact: Dr. Piet Schmidt (Piet.Schmidt@quantummetrology.de)
PhD and postdoc positions available at the University of Basel (Switzerland) on the topics of developing molecular-ion quantum technologies for precision measurements as well as cold ion-neutral interactions and collisions.
Contact: stefan.willitsch@unibas.ch
Details
PhD and postdoc positions available in the group of Tanja Mehlstäubler at PTB, working on optical clocks based on trapped ion Coulomb crystals. Topics include new interrogation protocols for multi-ensemble clocks, quantum-enhanced clock operation, ground-state cooling of mixed-species Coulomb crystals and tests of fundamental physics with precision spectroscopy.
Contact: Prof. Dr. Tanja Mehlstäubler (tanja.mehlstaeubler@quantummetrology.de).
Details
Multiple postdoc positions are available in the NIST Ion Storage Group in Colorado, USA. Topics include quantum simulation and sensing in a Penning trap, trapped-ion quantum computing, trapped-ion optical clocks, and quantum state control and precision spectroscopy of single molecular ions.
Contact: John Bollinger or any of the NIST Ion Storage group staff
Details
The research group of C. Ospelkaus at the University of Hannover is looking for a postdoctoral research associate on their Penning trap experiment, which aims to implement quantum logic spectroscopy of (anti-) protons for tests of the fundamental CPT symmetry as part of the BASE collaboration.
Contact: Dr. Christian Ospelkaus (christian.ospelkaus@iqo.uni-hannover.de)
A postdoc position is available at the Old Dominion University in Norfolk, Virginia, USA on a project trapping lutetium ions for precision measurements.
Contact: Dr. Matt Grau (mgrau@odu.edu).
two openings for PhD positions in the Molecular Systems group headed by Roland Wester at the University of Innsbruck. One position is part of a research project in collaboration with the University of Bordeaux on classical versus quantum effects in three-body collisions of cold trapped ions, funded through the Austrian Science Fund (FWF). The second position is part of a collaborative project on controlling
trapped charged nanoparticles, funded through the Austrian excellence cluster QuantA.
Contact: Prof. Dr. Roland Wester (roland.wester@uibk.ac.at).
Details
The Imperial College Particle Physics Group has a postgraduate studentship available to work on laser measurements of cold exotic helium atoms that contain antiprotons at the new ELENA facility of CERN in Geneva. This allows us to probe the matter-antimatter symmetry and determine the mass ratio between an antiproton and electron. We hope to be relatively flexible with regards to the exact PhD topic depending on the candidate’s interests. The studentship covers a maintenance bursary similar to standard STFC studentships.
Contact: m.hori@imperial.ac.uk
Publications
A compact and fast radio-frequency source for efficient Raman sideband cooling
Liren Pang, Zhiyu Ma, Biao Wang, Rui Gong, Songquan Wei, Hongli Liu, Wenhao Yuan, Ke Deng, Jie Zhang, Zehuang Lu
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 95, 123202 (2024)
Atomic fluorescence collection into planar photonic devices
Smedley, Orion; Natarajan, Vighnesh; Jaramillo, Oscar; Rivy, Hamim Mahmud; Mehta, Karan K.
2025
open access Optica Quantum 3(1) 28-35
Building a Scalable Ion Clock with a Coulomb Crystal
Marric Stephens
Physics 18, s7 (2025)
Chiral Discrimination through Holonomic Quantum Coherent Control with a Trapped-ion Qudit
Teng Liu, Fa Zhao, Pengfei Lu, Qifeng Lao, Xinxin Rao, Min Ding, ji bian, Feng Zhu and Le Luo
2025 New J. Phys.
Dynamical quantum maps for single-qubit gates under universal non-Markovian noise
J. M. Sánchez Velázquez, A. Steiner, R. Freund, M. Guevara-Bertsch, Ch. D. Marciniak, T. Monz, and A. Bermudez
Phys. Rev. Research 7, 013008 (2025)
Experimental fault-tolerant code switching
Ivan Pogorelov, Friederike Butt, Lukas Postler, Christian D. Marciniak, Philipp Schindler, Markus Müller & Thomas Monz
Nature Physics (2025)
Experimental Realization of Direct Entangling Gates between Dual-Type Qubits
Chenxi Wang, Chuanxin Huang, Hongxuan Zhang, Hongyuan Hu, Zhichao Mao, Panyu Hou, Yukai Wu, Zichao Zhou, and Luming Duan
Phys. Rev. Lett. 134, 010601 (2025)
Hamiltonian and Liouvillian learning in weakly-dissipative quantum many-body systems
Tobias Olsacher, Tristan Kraft, Christian Kokail, Barbara Kraus and Peter Zoller
2025 Quantum Sci. Technol. 10 015065
115 In+ − 172 Yb+ Coulomb Crystal Clock with 2.5×10−18 Systematic Uncertainty
H. N. Hausser, J. Keller, T. Nordmann, N. M. Bhatt, J. Kiethe, H. Liu, I. M. Richter, M. von Boehn, J. Rahm, S. Weyers, E. Benkler, B. Lipphardt, S. Dörscher, K. Stahl, J. Klose, C. Lisdat, M. Filzinger, N. Huntemann, E. Peik, and T. E. Mehlstäubler
Phys. Rev. Lett. 134, 023201 (2025)
Operating a Multi-Ion Clock with Dynamical Decoupling
Nitzan Akerman and Roee Ozeri
Phys. Rev. Lett. 134, 013201 (2025)
Probing Rotational Decoherence with a Trapped-Ion Planar Rotor
Neil Glikin, Benjamin A. Stickler, Ryan Tollefsen, Sara Mouradian, Neha Yadav, Erik Urban, Klaus Hornberger, and Hartmut Häffner
Phys. Rev. Lett. 134, 033601 (2025)
Programmable Quantum Simulations on a Trapped-Ion Quantum Computer with a Global Drive
Yotam Shapira, Jovan Markov, Nitzan Akerman, Ady Stern, and Roee Ozeri
Phys. Rev. Lett. 134, 010602 (2025)
Scalable High-Dimensional Multipartite Entanglement with Trapped Ions
Harsh Vardhan Upadhyay, Sanket Tripathy, Ting Rei Tan, Baladitya Suri and Athreya Shankar
2025 Quantum Sci. Technol.
Solving an industrially relevant quantum chemistry problem on quantum hardware
Ludwig Nützel, Alexander Gresch, Lukas Hehn, Lucas Marti, Robert Freund, Alex Steiner, Christian D Marciniak, Timo Eckstein, Nina Stockinger, Stefan Wolf, Thomas Monz, Michael Kühn and Michael J Hartmann Hide full author list
2025 Quantum Sci. Technol. 10 015066
Trapped-ion quantum simulation of electron transfer models with tunable dissipation
V, MIDHUNA DURAISAMY SUGANTHI, ABHISHEK MENON, MINGJIAN ZHU, ROMAN ZHURAVEL, HAN PU, PETER G. WOLYNES, JOSÉ N. ONUCHIC , AND GUIDO PAGANO
SCIENCE ADVANCES
20 Dec 2024
Vol 10, Issue 51
DOI: 10.1126/sciadv.ads8011
Verifiable measurement-based quantum random sampling with trapped ions
Martin Ringbauer, Marcel Hinsche, Thomas Feldker, Paul K. Faehrmann, Juani Bermejo-Vega, Claire L. Edmunds, Lukas Postler, Roman Stricker, Christian D. Marciniak, Michael Meth, Ivan Pogorelov, Rainer Blatt, Philipp Schindler, Jens Eisert, Thomas Monz & Dominik Hangleiter
Nature Communications volume 16, Article number: 106 (2025)
What’s under the hood of a quantum computer?
Christine Middleton
Physics Today 78 (1), 58–61 (2025)
Preprints
Blind calibration of a quantum computer
Authors: Liam M. Jeanette, Jadwiga Wilkens, Ingo Roth, Anton Than, Alaina M. Green, Dominik Hangleiter, Norbert M. Linke
Cavity-assisted quantum transduction between superconducting qubits and trapped atomic particles mediated by Rydberg levels
Authors: Fernando L. Semião, Matthias Keller
Controlling the spontaneous emission of trapped ions
Authors: Tommaso Faorlin, Benjamin Yadin, Yannick Weiser, Gabriel Araneda, Stefan Nimmrichter, Lorenz Panzl, Thomas Lafenthaler, Rainer Blatt, Thomas Monz, Giovanni Cerchiari
Determination of Landé gJ factor and Zeeman coefficients in ground-state 171Yb+ and their applications to quantum frequency standards
Authors: Jize Han, Benquan Lu, Yanmei Yu, Jiguang Li, Zhiguo Huang, Jingwei Wen, Ling Qian, Lijun Wang
Efficient Compilation for Shuttling Trapped-Ion Machines via the Position Graph Architectural Abstraction
Authors: Bao Bach, Ilya Safro, Ed Younis
Experimental observation of parity-symmetry-protected phenomena in the quantum Rabi model with a trapped ion
Authors: Xingyu Zhao, Qian Bin, Waner Hou, Yi Li, Yue Li, Yiheng Lin, Xin-You Lü, Jiangfeng Du
Experimental distributed quantum sensing in a noisy environment
Authors: James Bate, Arne Hamann, Marco Canteri, Armin Winkler, Zhe Xian Koong, Victor Krutyanskiy, Wolfgang Dür, Benjamin Peter Lanyon
Fast Mølmer-Sørensen gates in trapped-ion quantum processors with compensated carrier transition
Authors: Evgeny Anikin, Andrey Chuchalin, Nikita Morozov, Olga Lakhmanskaya, Kirill Lakhmanskiy
Ion Trap Geometry
Authors: Evgeny V Krylov
Measuring full counting statistics in a quantum simulator
Authors: Lata Kh Joshi, Filiberto Ares, Manoj K. Joshi, Christian F. Roos, Pasquale Calabrese
Neural network enhanced cross entropy benchmark for monitored circuits
Authors: Yangrui Hu, Yi Hong Teoh, William Witczak-Krempa, Roger G. Melko
Neutral Atoms in Optical Tweezers as Messenger Qubits for Scaling up a Trapped Ion Quantum Computer
Authors: Svetlana Kotochigova, Subhadeep Gupta, Boris Blinov
On Measures in Ion Trap Quantum Information
Authors: Reza Pirmoradian, M Reza Tanhayi
Performance Analysis for Crosstalk Errors between Parallel Entangling Gates in Trapped Ion Quantum Error Correction
Authors: Fangxuan Liu, Gaoxiang Tang, Luming Duan, Yukai Wu
Probing Nuclear Excitation by Electron Capture in an Electron Beam Ion Trap with Non-destructive Isomer Detection via Precision Mass Spectrometry
Authors: Bingsheng Tu, Nan Xue, Jialin Liu, Qi Guo, Yuanbin Wu, Zuoye Liu, Adriana Pálffy, Yang Yang, Ke Yao, Baoren Wei, Yaming Zou, Xiangjin Kong, Yu-Gang Ma
QSteed: Quantum Software of Compilation for Supporting Real Quantum Device
Authors: Hong-Ze Xu, Zheng-An Wang, Yu-Long Feng, Yu Chen, Xinpeng Zhang, Jingbo Wang, Xu-Dan Chai, Wei-Feng Zhuang, Yu-Xin Jin, Yirong Jin, Haifeng Yu, Heng Fan, Meng-Jun Hu, Dong E. Liu
Robust Mølmer-Sørensen Gate Against Symmetric and Asymmetric Errors
Authors: Wenhao Zhang, Gaoxiang Tang, Kecheng Liu, Xiao Yuan, Yangchao Shen, Yukai Wu, Xiao-Ming Zhang
String breaking dynamics in Ising chain with local vibrations
Authors: Arindam Mallick, Maciej Lewenstein, Jakub Zakrzewski, Marcin Płodzień
The phase diagram of quantum chromodynamics in one dimension on a quantum computer
Authors: Anton T. Than, Yasar Y. Atas, Abhijit Chakraborty, Jinglei Zhang, Matthew T. Diaz, Kalea Wen, Xingxin Liu, Randy Lewis, Alaina M. Green, Christine A. Muschik, Norbert M. Linke
Unpolarized prethermal discrete time crystal
Authors: Takeru Yokota, Tatsuhiko N. Ikeda