ITN Newsletter – May 2023

ITN Newsletter – May 2023

After almost 12 years, this monthly appointment with the ITN Newsletter is coming to an end. Farewell or goodbye?!? For sure, a big thank to Martina Knoop, who has been the editor of such a successful publication!

Time to say good-bye – last issue of this newsletter
Dear all,

almost 12 years that I have sent the first issue of the Ion Trapper’s Newsletter in the frame of the first COST Action on Trapped Ions. My “most read” publication has seen the announcement of numerous events, jobs, the Nobel prize awarded to one of its readers, and – even if not exhaustive – an amazing number of publications and preprints, demonstrating the incredible dynamics of an ever-growing community. From its first 250 readers, the audience has grown to over 1200 subscribers, and our follow-up shows that 50% of the recipients regularly open the email to look at the contents.

Personally, I have moved on to other responsibilities a while ago, and I do no longer have the time nor can have the necessary commitment to continue the monthly publication. I have therefore taken the decision to stop to send this newsletter.
From your very enthusiastic returns over the last years, I know that many of you consider this newsletter to be very helpful and I am proud of this. The ion trapper community should make an effort to continue a newsletter. I dare hope that there are individuals or groups who are volunteering to continue this work. This might also be an opportunity to refresh contents, format, contributions to this newsletter. I will of course be willing to help to organize the transition.
I will not end before acknowledging people who have supported this newsletter. The most important investment comes from Alejandro Bermudez who has been working on the publication lists for the last 8 years or so. He took over from Kevin Sheridan, who started to help me, when I could not juggle with your abundant scientific production any longer. There have been a couple of sponsors from the larger ion trapping groups who have financially supported this publication, and also Mirjam Bruttin who has coordinated these supports. Many thanks and a vibrant applause to all of them !
Thanks a lot for reading and see you at ECTI !




Registration and abstract submission for the European Conference on Trapped Ions (ECTI) are open. Please note the earlier deadline for submitting abstracts for Hot Topic Talks, which is 15 July. Only a limited number of places are available – register soon!
You will find all the details at

Frontiers in Quantum Science and Technology special issue “Micromotion in Trapped Ion Systems”. Submissions are accepted from now until 18th September 2023. Details at



54 EGAS, Strasbourg/France, 18-22 June 2023 Details

25th ICOLS, Estes Park, Colorado/USA, 25-30 June 2023 Details

ICPEAC 2023 will be held in Ottawa (Canada), from July 25th to August 1st of 2023 Details

Impurity Physics with Cold Atoms and Ions, Aarhus, Denmark, 21-23 August 2023 Details

Workshop on Ultracold Molecules (satellite event to BEC 2023 Conference) to be held at the campus of the University of Warsaw, Warsaw, Poland, from 5-8 September, 2023. Details

25-29 September 2023: ECTI in Schlosshotel Bückeburg close to Hannover Germany. Details are HERE

9th Symposium on Frequency Standards and Metrology will be held on 16-20 October 2023 at Kingscliff, New South Wales, Australia. A Summer School will be associated. Details

Already the 5th edition !
Les Houches Winter School on “Physics with Trapped Charged Particles” is scheduled for 15-26 January 2024. Details

Online seminars

Virtual Seminar on Precision Physics and Fundamental Symmetries – an initiative for the precision physics and quantum information community,  every Thursday   LINK
The “Virtual AMO Seminar” ( Fridays, 7pm (UTC)

The “Quantum Science Seminar” (  on Thursdays, 5 pm



Several open PhD and PostDoc positions in the Quantum Logic Spectroscopy group of Piet Schmidt at PTB and LUH in the field of quantum-engineered multi-ion spectroscopy and transportable ion clocks. Details
A postdoc/PhD student postion in proton/antiproton precision measurements in the network of the BASE collaboration (HHU Düsseldorf, MPI K Heidelberg, JGU Mainz).
The project deals with developing sympathetic cooling methods for single protons and antiprotons. Details
Vacancies for Research fellows at Sussex Centre for Quantum Technologies. Details can be found here, here and here
A Postdoc position / PhD student position to work with the transportable optical ion clock opticlockis available at PTB, Braunschweig, Germany. Details
The BASE collaboration at CERN has several open PhD and Postdoc positions available. BASE uses advanced Penning trap systems to test the Standard Model of particle physics by comparing the fundamental properties of protons and antiprotons with unparalleled resolution. Details or contact Stefan Ulmer
Full-time editorial position – Quantum Information. The editorial teams of PRX Quantum and Physical Review Applied are looking for someone with a deep understanding of the research and academic publishing landscape in quantum, a keen eye for detail, and excellent communication skills. A full job description can be found here.
A Ph.D. position in trapped-ion quantum computing in the group of Christian Ospelkaus at the Leibniz Universität Hannover, in Hannover, Germany. Details can be found here
An open postdoc position in antihydrogen physics with ALPHA at CERN. Details
Postdoc positions in Quantum Chemistry for Ultracold Physics in Warsaw. Details
A Postdoc / PhD student position in precision spectroscopy in In+/Yb+ Coulomb crystals is available in the group of Tanja Mehlstäubler at PTB, Braunschweig, Germany. Further information HERE
A PhD position in Cavity-QED with multi-species ion crystals with Prof. M. Keller at Sussex University, Brighton, UK. Details
Open postdoc position in mass spectrometry – cold ion spectroscopy instrumentation at EPFL (Switzerland). For details contact Oleg Boyarkine

A PhD position on quantum state engineering in a laser-cooled ion cloud to
study diffusion in a non-neutral plasma at CNRS/Aix-Marseille University in Marseille. For details contact Caroline Champenois

Postdoc and PhD positions in laser spectroscopy group (Dopfer) at TU Berlin (Germany), Details can be found HERE
Various PhD and postdoc positions are available in the group of Stefan Willitsch at the University of Basel (Switzerland) on the development of quantum technologies for single trapped molecular ions and their application in precision spectroscopy. Further information can be found HERE
A fully funded PhD position is available to work on ion–molecule reaction studies in the Department of Physics at the University of Liverpool. The project is supported by the Leverhulme Trust, providing a stipend for 3.5 years and covering all fees for UK candidates. Details


Please sent information about your publications to

Bespoke pulse design for robust rapid two-qubit gates with trapped ions
Seyed Shakib Vedaie, Eduardo J. Páez, Nhung H. Nguyen, Norbert M. Linke, and Barry C. Sanders
Phys. Rev. Research 5, 023098 (2023)

Characterization of fast ion transport via position-dependent optical deshelving
Craig R. Clark, Creston D. Herold, J. True Merrill, Holly N. Tinkey, Wade Rellergert, Robert Clark, Roger Brown, Wesley D. Robertson, Curtis Volin, Kara Maller, Chris Shappert, Brian J. McMahon, Brian C. Sawyer, and Kenton R. Brown
Phys. Rev. A 107, 043119 (2023)

Chiral-coupling-assisted refrigeration in trapped ions
Chi-Chih Chen, Yi-Cheng Wang, Chun-Che Wang and H H Jen
J. Phys. B: At. Mol. Opt. Phys. 56 105502 (2023)

Cold collisions between alkali metals and alkaline-earth metals in the heteronuclear atom-ion system Li+Ba+
Dibyendu Sardar and Somnath Naskar
Phys. Rev. A 107, 043323 (2023)

Controlling Two-Dimensional Coulomb Crystals of More Than 100 Ions in a Monolithic Radio-Frequency Trap
Dominik Kiesenhofer, Helene Hainzer, Artem Zhdanov, Philip C. Holz, Matthias Bock, Tuomas Ollikainen, and Christian F. Roos
PRX Quantum 4, 020317 (2023)

Coupled-oscillator model to analyze the interaction between a quartz resonator and trapped ions
E. Altozano, J. Berrocal, S. Lohse, F. Domínguez, M. Block, J. J. García-Ripoll, and D. Rodríguez
Phys. Rev. A 107, 053116 (2023)

Effects of an Oscillating Electric Field on and Dipole Moment Measurement of a Single Molecular Ion
Alejandra L. Collopy, Julian Schmidt, Dietrich Leibfried, David R. Leibrandt, and Chin-Wen Chou
Phys. Rev. Lett. 130, 223201 (2023)

Effect of fast noise on the fidelity of trapped-ion quantum gates
Haim Nakav, Ran Finkelstein, Lee Peleg, Nitzan Akerman, and Roee Ozeri
Phys. Rev. A 107, 042622 (2023)

Experimental Observation of Thermalization with Noncommuting Charges
Florian Kranzl, Aleksander Lasek, Manoj K. Joshi, Amir Kalev, Rainer Blatt, Christian F. Roos, and Nicole Yunger Halpern
PRX Quantum 4, 020318 (2023)

High-fidelity transport of trapped-ion qubits in a multilayer array
Deviprasath Palani, Florian Hasse, Philip Kiefer, Frederick Boeckling, Jan-Philipp Schroeder, Ulrich Warring, and Tobias Schaetz
Phys. Rev. A 107, L050601 (2023)

Improving trapped-ion-qubit memories via code-mediated error-channel balancing
Yannick Seis, Benjamin J. Brown, Anders S. Sørensen, and Joseph F. Goodwin
Phys. Rev. A 107, 052417 (2023)

Ion trap long-range XY model for quantum state transfer and optimal spatial search
Dylan Lewis, Leonardo Banchi, Yi Hong Teoh, Rajibul Islam and Sougato Bose
Quantum Sci. Technol. (2023)

Isotope Exchange Reaction of OH− Anion with HD at Temperatures from 15 K up to 300 K: Ion Trap Study
Radek Plašil, Liliia Uvarova, Serhiy Rednyk, Štěpán Roučka, Erik Vanko, Petr Dohnal and Juraj Glosík
ApJ 948 131 (2023)

Modeling noise in global Mølmer-Sørensen interactions applied to quantum approximate optimization
Phillip C. Lotshaw, Kevin D. Battles, Bryan Gard, Gilles Buchs, Travis S. Humble, and Creston D. Herold
Phys. Rev. A 107, 062406 (2023)

Progress in quantum teleportation
Xiao-Min Hu, Yu Guo, Bi-Heng Liu, Chuan-Feng Li & Guang-Can Guo
Nature Reviews Physics volume 5, pages 339–353 (2023)

Prototype of a phonon laser with trapped ions
Chen-Yu Lee, Kuan-Ting Lin, and Guin-Dar Lin
Phys. Rev. Research 5, 023082 (2023)

Quantum Repeater Goes the Distance
Michal Hajdušek
Graduate School of Media and Governance, Keio University, Fujisawa, Japan
May 22, 2023• Physics 16, 84

Quantum Simulations of Interacting Systems with Broken Time-Reversal Symmetry
Yotam Shapira, Tom Manovitz, Nitzan Akerman, Ady Stern, and Roee Ozeri
Phys. Rev. X 13, 021021 (2023)

Realizing quantum gates with optically addressable 171Yb+ ion qudits
M. A. Aksenov, I. V. Zalivako, I. A. Semerikov, A. S. Borisenko, N. V. Semenin, P. L. Sidorov, A. K. Fedorov, K. Yu. Khabarova, and N. N. Kolachevsky
Phys. Rev. A 107, 052612 (2023)

Robust oscillator-mediated phase gates driven by low-intensity pulses
Iñigo Arrazola & Jorge Casanova
Communications Physics volume 6, Article number: 123 (2023)

Robust Two-Qubit Gates Using Pulsed Dynamical Decoupling
Patrick Barthel, Patrick H. Huber, Jorge Casanova, Inigo Arrazola, Dorna Niroomand, Theeraphot Sriarunothai, Martin Bodo Plenio and Christof Wunderlich
New J. Phys 2023)

Rydberg ions in coherent motional states: a new method for determining the polarizability of Rydberg ions
Marie Niederländer1, Jonas Vogel1, Alexander Schulze-Makuch1, Bastien Gély1, Arezoo Mokhberi3,1 and Ferdinand Schmidt-Kaler3,1,2
New J. Phys. 25 033020 (2023)

Shuttled” Ions Stay Quantum
May 26, 2023• Physics 16, s75

Systematic study of tunable laser cooling for trapped-ion experiments
A P Kulosa, O N Prudnikov, D Vadlejch, H A Fürst, A A Kirpichnikova, A V Taichenachev, V I Yudin and T E Mehlstäubler
New J. Phys. 25 053008 (2023)

Telecom-Wavelength Quantum Repeater Node Based on a Trapped-Ion Processor
V. Krutyanskiy, M. Canteri, M. Meraner, J. Bate, V. Krcmarsky, J. Schupp, N. Sangouard, and B. P. Lanyon
Phys. Rev. Lett. 130, 213601 (2023)

Test of Causal Nonlinear Quantum Mechanics by Ramsey Interferometry with a Trapped Ion
Joseph Broz, Bingran You, Sumanta Khan, Hartmut Häffner, David E. Kaplan, and Surjeet Rajendran
Phys. Rev. Lett. 130, 200201 (2023)

Toward a Transportable Ca+ Optical Clock with a Systematic Uncertainty of 4.8 × 10−18
Mengyan Zeng, Yao Huang, Baolin Zhang, Yanmei Hao, Zixiao Ma, Ruming Hu, Huaqing Zhang, Zheng Chen, Miao Wang, Hua Guan, and Kelin Gao
Phys. Rev. Applied 19, 064004 (2023)

Transport of Multispecies Ion Crystals through a Junction in a Radio-Frequency Paul Trap
William Cody Burton, Brian Estey, Ian M. Hoffman, Abigail R. Perry, Curtis Volin, and Gabriel Price
Phys. Rev. Lett. 130, 173202 (2023)
Tunneling measured in a very slow ion-molecule reaction
R. Wild, M. Nötzold, M. Simpson, T. D. Tran, R. Wester
Nature 615, 425 (2023)



BASE-STEP: A transportable antiproton reservoir for fundamental interaction studies
C. Smorra, F. Abbass, M. Bohman, Y. Dutheil, A. Hobl, D. Popper, B. Arndt, B. B. Bauer, J. A. Devlin, S. Erlewein, M. Fleck, J. I. Jäger, B. M. Latacz, P. Micke, M. Schiffelholz, G. Umbrazunas, M. Wiesinger, C. Will, E. Wursten, H. Yildiz, K. Blaum, Y. Matsuda, A. Mooser, C. Ospelkaus, W. Quint, A. Soter, J. Walz, Y. Yamazaki, S. Ulmer

How to wire a 1000-qubit trapped ion quantum compute
M. Malinowski, D. T. C. Allcock, C. J. Ballance

Low noise quantum frequency conversion of photons from a trapped barium ion to the telecom O-band
Uday Saha, James D. Siverns, John Hannegan, Qudsia Quraishi, Edo Waks

Non-Markovian cost function for quantum error mitigation with Dirac Gamma matrices representation
Doyeol Ahn

Robust and scalable rf spectroscopy in first-order magnetic sensitive states at second-long coherence time
C. -H. Yeh, K. C. Grensemann, L. S. Dreissen, H. A. Fürst, T. E. Mehlstäubler

Scaling of entangling-gate errors in large ion crystals
Wenhao He, Wenhao Zhang, Xiao Yuan, Yangchao Shen, Xiao-Ming Zhang

Spin-boson model under dephasing: Markovian vs Non-Markovian dynamics
Naushad Ahmad Kamar, Daniel A. Paz, Mohammad F. Maghrebi

Synthetic Z2 gauge theories based on parametric excitations of trapped ions
O. Băzăvan, S. Saner, E. Tirrito, G. Araneda, R. Srinivas, A. Bermudez

Thermal light in confined dimensions for “laser” cooling with unfiltered sunlight
Amanda Younes, Wesley C. Campbell

Trapped-ion quantum simulations for condensed-phase chemical dynamics: seeking a quantum advantage
Mingyu Kang, Kai T. Liu, Sutirtha N. Chowdhury, Jonathon L. Yuly, Ke Sun, Jacob Whitlow, Jesús Valdiviezo, Zhendian Zhang, Peng Zhang, David N. Beratan, Kenneth R. Brown

Universal defects statistics with strong long-range interactions
Stefano Gherardini, Lorenzo Buffoni, Nicolò Defenu

Verifiable blind quantum computing with trapped ions and single photons
P. Drmota, D. P. Nadlinger, D. Main, B. C. Nichol, E. M. Ainley, D. Leichtle, A. Mantri, E. Kashefi, R. Srinivas, G. Araneda, C. J. Ballance, D. M. Lucas

Copyright 2023 ITN | Published on behalf of the former COST Action Trapped Ions: Progress in classical and quantum applications
Editorial team: Alejandro Bermudez, Martina Knoop

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