Foreword
Dear Ion Trappers,
We’re truly grateful for the ongoing engagement from the iontrap community, who keep the conversation lively by sharing their latest news, events, jobs, publications, and editorials. Visit the ITN-Website (https://iontraps.net/) where you can download the current and archived issues and send us your submissions and events directly using the forms. Please continue to send us your thoughts; your contributions make our newsletter vibrant and enriching.
Events
European Quantum Technologies Conference (EQTC 2024) will be held in Lisbon, Portugal, from 18 to 20 November. Details
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
Jobs
The Trapped Ion Quantum Information group at ETH Zürich is seeking for post-doctoral and PhD researchers across a range of topics in the group, but focussed particularly in the areas of Penning Trap Quantum Computing, Quantum Metrology of Hydrogen Molecular Ions, and Multi-Zone Trapped Ion Quantum Information. The TIQI group welcomes applications from underrepresented groups, as well as from a diverse range of backgrounds, in particular from outside the direct realm of trapped ions.
Contact: tiqi-application@lists.phys.ethz.ch.
A fully funded, 3.5-year PhD position is available in the Ion Trap Cavity-QED and Molecular Physics (ITCM) Group in the Department of Physics & Astronomy at the University of Sussex.
Contact: Prof Matthias Keller (m.k.keller@sussex.ac.uk).
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
For a 3-year postdoc opportunity at MIT & Texas A&M, the NEPTUNE project [PRL 133, 033003 (2024)] seeks candidates with hands-on experience in Penning traps.
Contact: Jonas Karthein (karthein@tamu.edu).
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 comprehensive study on a tapered Paul trap: from design to potential applications
Bo Deng, Moritz Göb, Max Masuhr, Johannes Roßnagel, Georg Jacob, Daqing Wang and Kilian Singer
2025 Quantum Sci. Technol. 10 015017
Alignment and optimization of optical tweezers on trapped ions
M. Mazzanti, C. Robalo Pereira, N. A. Diepeveen, B. Gerritsen, Z. Wu, Z. E. D. Ackerman, L. P. H. Gallagher,
A. Safavi-Naini, R. Gerritsma, and R. X. Schüssler
Phys. Rev. A 110, 043105 (2024)
Digital-Analog Counterdiabatic Quantum Optimization with Trapped Ions
Shubham Kumar, Narendra N. Hegade, Alejandro Gomez-Cadavid, Murilo Henrique de Oliveira, Enrique Solano and Francisco Albarrán-Arriagada
2024 Quantum Sci. Technol.
Digital Quantum Simulation of a (1+1)D SU(2) Lattice Gauge Theory with Ion Qudits
Giuseppe Calajó, Giuseppe Magnifico, Claire Edmunds, Martin Ringbauer, Simone Montangero, and Pietro
Silvi
PRX Quantum 5, 040309 (2024)
Entangling Four Logical Qubits Beyond Break-even in a Nonlocal Code
Yifan Hong, Elijah Durso-Sabina, David Hayes, and Andrew Lucas
Phys. Rev. Lett. 133, 180601 (2024)
Fast ground-state-to-ground-state separation of small ion crystals
Tyler H. Guglielmo, Dietrich Leibfried, Stephen B. Libby, and Daniel H. Slichter
Phys. Rev. A 110, 042610 (2024) –
Generalized theory for optical cooling of a trapped atom with spin
Saumitra S. Phatak, Karl N. Blodgett, David Peana, Meng Raymond Chen, and Jonathan D. Hood
Phys. Rev. A 110, 043116 (2024)
GHZ protocols enhance frequency metrology despite spontaneous decay
TIMM KIELINSKI , PIET O. SCHMIDT AND KLEMENS HAMMERER
SCIENCE ADVANCES
23 Oct 2024
Vol 10, Issue 43
Individual-Ion Addressing and Readout in a Penning Trap
Brian J. McMahon, Kenton R. Brown, Creston D. Herold, and Brian C. Sawyer
Phys. Rev. Lett. 133, 173201 (2024) – Published 23 October 2024
Ion-chain sympathetic cooling and gate dynamics
A. Paul and C. Noel
Pays. Rev. Applied 22, 044033 (2024)
Long-lifetime optical trapping of a 40Ca+ ion
Zheng Chen, Miao Wang, Baolin Zhang, Huaqing Zhang, Zixiao Ma, Ruming Hu, Yao Huang, Kelin Gao and Hua Guan
2024 Chinese Phys. Lett.
Measurement-induced heating of a trapped ion
A J Rasmusson, Ilyoung Jung, Frank G Schroer, Antonis Kyprianidis and Philip Richerme
2024 J. Phys. B: At. Mol. Opt. Phys. 57 225002
Observation of quantum superposition of topological defects in a trapped-ion quantum simulator
BY ZHI-JIE CHENG YU-KAI WU SHI-JIAO LI QUAN-XIN MEI BO-WEN LI GANG-XI WANG YUE JIANG BIN-XIANG QI ZI-CHAO ZHOU PAN-YU HOU LU-MING DUAN
SCIENCE ADVANCES, 10, NO. 42
Observation of Space-Dependent Rotational Doppler Shifts with a Single Ion Probe
Nicolás A. Nuñez Barreto, Muriel Bonetto, Marcelo A. Luda, Cecilia Cormick, and Christian T. Schmiegelow
Phys. Rev. Lett. 133, 183601 (2024)
Onset of quantum thermalization in the Jahn-Teller model
Yoana R. Chorbadzhiyska and Peter A. Ivanov
Phys. Rev. E 110, 044127 (2024)
Physical coherent cancellation of optical addressing crosstalk in a trapped-ion experiment
Jeremy Flannery, Roland Matt, Luca I Huber, Kaizhao Wang, Christopher Axline, Robin Oswald and Jonathan P Home
2025 Quantum Sci. Technol. 10 015012
Polarization-insensitive state preparation for trapped-ion hyperfine qubits
A. D. Leu, M. C. Smith, M. F. Gely, and D. M. Lucas
Phys. Rev. A 110, L040402 (2024)
Probing the 𝑁=104 midshell region for the 𝑟 process via precision mass spectrometry of neutron-rich rare-earth isotopes with the JYFLTRAP double Penning trap
A. Jaries, S. Nikas, A. Kankainen, T. Eronen, O. Beliuskina, T. Dickel, M. Flayol, Z. Ge, M. Hukkanen, M. Mougeot, I. Pohjalainen, A. Raggio, M. Reponen, J. Ruotsalainen, M. Stryjczyk, and V. Virtanen
Phys. Rev. C 110, 045809 (2024)
Probing the Rotational Doppler Effect with a Single Ion
Charles Day
Physics 17, s133,October 29, 2024•
Pr10+ as a candidate for a high-accuracy optical clock for tests of fundamental physics
S. G. Porsev, C. Cheung, M. S. Safronova, H. Bekker, N.-H. Rehbehn, J. R. Crespo López-Urrutia, and S. M. Brewer
Phys. Rev. A 110, 042823 (2024)
𝒫𝒯-symmetry-breaking transition in a chain of trapped interacting ions
Zhenxin Hu and Zhenhua Yu
Phys. Rev. A 110, 043103 (2024) –
Qubits Manipulated on the Fly
Christian Roos
Physics 17, 152 (2024)
Scalable Architecture for Trapped-Ion Quantum Computing Using rf Traps and Dynamic Optical Potentials
David Schwerdt, Lee Peleg, Yotam Shapira, Nadav Priel, Yanay Florshaim, Avram Gross, Ayelet Zalic, Gadi Afek, Nitzan Akerman, Ady Stern, Amit Ben Kish, and Roee Ozeri
Phys. Rev. X 14, 041017 (2024)
Sensing Aharonov-Bohm Phase Using a Multiply-Orbiting-Ion Interferometer
Ryoichi Saito and Takashi Mukaiyama
Phys. Rev. Lett. 133, 143402 (2024)
Single-ion spectroscopy of four metastable-state clear-out transitions in Yb+: Isotope shifts and hyperfine structure
N. A. Diepeveen, C. Robalo Pereira, M. Mazzanti, Z. E. D. Ackerman, L. P. H. Gallagher, T. Timmerman, R. Gerritsma, and R. X. Schüssler
Phys. Rev. A 110, 042809 (2024)
The Peregrine Ion Trap Mass Spectrometer (PITMS) Investigation Development and Preflight Planning
Barbara A. Cohen, Simeon J. Barber, Phillip A. Driggers, David Heather, Christopher Howe, Peter Landsberg, Thomas Morse, Roland Trautner, Feargus Abernethy, Emma-May ButroidShow full author list
2024 Planet. Sci. J. 5 212
Zeeman decoherence effect of trapped 199Hg+ ion Ramsey spectra
Ge Liu, 格 刘, Hao Liu, 浩 柳, Yihe Chen, 义和 陈, Jian Wang, 健 王, Shuhong Huang, 书泓 黄Show full author list
2024 Chinese Phys. B 33 113702
Preprints
An Accessible Planar Ion Trap for Experiential Learning in Quantum Technologies
Authors: Robert E. Thomas, Cole E. Wolfram, Noah B. Warren, Isaac J. Fouch, Boris B. Blinov, Maxwell F. Parsons
Cancellation of phonon hopping in trapped ions by modulation of the trap potential
Authors: Takanori Nishi, Ryoichi Saito, Takashi Mukaiyama, Kaoru Yamanouchi
Coherent Control of Photon Correlations in Trapped Ion Crystals
Authors: K. Singh, A. Cidrim, A. Kovalenko, T. Pham, O. Číp, L. Slodička, R. Bachelard
Condensation phenomena of ions in an electrostatic logarithmic trap
Authors: Loris Ferrari
Efficient Hamiltonian engineering
Authors: Pascal Baßler, Markus Heinrich, Martin Kliesch
Entanglement-induced provable and robust quantum learning advantages
Authors: Haimeng Zhao, Dong-Ling Deng
Experimental realization of direct entangling gates between dual-type qubits
Authors: Chenxi Wang, Chuanxin Huang, Hongxuan Zhang, Hongyuan Hu, Zhichao Mao, Panyu Hou, Yukai Wu, Zichao Zhou, Luming Duan
Harnessing quantum chaos in spin-boson models for all-purpose quantum-enhanced sensing
Authors: Yicheng Zhang, Juan Zuniga Castro, Robert J. Lewis-Swan
High-precision mass measurement of 103Sn restores smoothness of the mass surface
Authors: C. M. Ireland, F. M. Maier, G. Bollen, S. E. Campbell, X. Chen, H. Erington, N. D. Gamage, M. J. Gutiérrez, C. Izzo, E. Leistenschneider, E. M. Lykiardopoulou, R. Orford, W. S. Porter, D. Puentes, M. Redshaw, R. Ringle, S. Rogers, S. Schwarz, L. Stackable, C. S. Sumithrarachchi, A. A. Valverde, A. C. C. Villari, I. T. Yandow
Integrating Window-Based Correlated Decoding with Constant-Time Logical Gates for Large-Scale Quantum Computation
Authors: Jiaxuan Zhang, Zhao-Yun Chen, Jia-Ning Li, Tian-Hao Wei, Huan-Yu Liu, Xi-Ning Zhuang, Qing-Song Li, Yu-Chun Wu, Guo-Ping Guo
Measuring error rates of mid-circuit measurements
Authors: Daniel Hothem, Jordan Hines, Charles Baldwin, Dan Gresh, Robin Blume-Kohout, Timothy Proctor
Molecular Quantum Control Algorithm Design by Reinforcement Learning
Authors: Anastasia Pipi, Xuecheng Tao, Prineha Narang, David R. Leibrandt
Observation of quantum superposition of topological defects in a trapped ion quantum simulator
Authors: Zhijie Cheng, Yukai Wu, Shijiao Li, Quanxin Mei, Bowen Li, Gangxi Wang, Yue Jiang, Binxiang Qi, Zichao Zhou, Panyu Hou, Luming Duan
Observation of string-breaking dynamics in a quantum simulator
Authors: Arinjoy De, Alessio Lerose, De Luo, Federica M. Surace, Alexander Schuckert, Elizabeth R. Bennewitz, Brayden Ware, William Morong, Kate S. Collins, Zohreh Davoudi, Alexey V. Gorshkov, Or Katz, Christopher Monroe
Preliminary characterization of a surface electrode Paul trap for frequency metrology
Authors: Josipa Madunic, Lucas Groult, Bachir Achi, Thomas Lauprêtre, Alan Boudrias, Pierre Roset, Valérie Soumann, Yann Kersalé, Moustafa Abdel Hafiz, Clément Lacroûte
Preparing topological states with finite depth simultaneous commuting gates
Authors: Yarden Sheffer, Erez Berg, Ady Stern
Quantum logic control of a transition metal ion
Authors: Till Rehmert, Maximilian J. Zawierucha, Kai Dietze, Piet O. Schmidt, Fabian Wolf
Quantum spatial search with multiple excitations
Authors: Dylan Lewis, Leonardo Banchi, Sougato Bose
Ring-exchange physics in a chain of three-level ions
Authors: Sourav Biswas, E. Rico, Tobias Grass
Robustness of near-thermal dynamics on digital quantum computers
Authors: Eli Chertkov, Yi-Hsiang Chen, Michael Lubasch, David Hayes, Michael Foss-Feig
State Selective Preparation and Nondestructive Detection of Trapped O+2
Authors: Ambesh Pratik Singh, Michael Mitchell, Will Henshon, Addison Hartman, Annika Lunstad, Boran Kuzhan, David Hanneke
The PT-symmetry-breaking transition in a chain of trapped interacting ions
Authors: Zhenxin Hu, Zhenhua Yu
Toward hybrid quantum simulations with qubits and qumodes on trapped-ion platforms
Authors: Jack Y. Araz, Matt Grau, Jake Montgomery, Felix Ringer