ITN Newsletter – April 2021

ITN Newsletter – April 2021

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Version 1 of the Portal for High-Precision Atomic Data and Computation has been released by our colleagues at University of Delaware. The portal provides transition matrix elements, transition rates, radiative lifetimes, branching ratios, and polarizabilities for atoms and ions. The team seeks community input, and all comments and suggestions are welcome and can be addressed to Marianna Safronova. Applause for this great initiative, which provides all properties of our favourite ions at one glance, with many more still to come !


Dear all,

version 1 of the Portal for High-Precision Atomic Data and Computation has been released by our colleagues at University of Delaware and is accessible via:
The portal provides transition matrix elements, transition rates, radiative lifetimes, branching ratios, and polarizabilities for atoms and ions. The team seeks community input, and all comments and suggestions are welcome and can be addressed to Marianna Safronova.
Applause for this great initiative, which provides all properties of our favourite ions at one glance, with many more still to come !
Your editorial team


As follow-up on the Artiq-day on 28 April, please reply to the 2021 Artiq USER survey HERE
Surveys of the ARTIQ/Sinara user community were last collected in 2017 and 2018. The questions were developed with feedback from NIST, Oxford, Oregon, M-Labs and Warsaw. The survey results are public.

Portal for High-Precision Atomic Data and Computation has been released at University of Delaware and is accessible via:

EPJ QT special issue: “Quantum Metrology & Quantum Enhanced Measurement“. Submissions are accepted from now until 30 June 2021. Details



724. WE-Heraeus-Seminar: Collective Effects and Non‐Equilibrium Quantum Dynamics 2021
June 27, 2021 to June 30, 2021 LINK

European Conference on Trapped Ions (ECTI), Djurönäset, Sweden, summer 2021

52nd EGAS conference, online event, 6-8 July 2021   DEADLINE 8 MAY!

Summer School: Machine Learning in Quantum Physics and Chemistry will be held in Warsaw (Poland) at the Faculty of Physics of the University of Warsaw, 24 August – 3 September 2021 Details

Quantum Optics X Conference, Toruń, Poland, 5 – 11 September 2021

14th European Conference on Atoms Molecules and Photons (ECAMP14)  in Vilnius, Lithuania, June 27- July 1, 2022 LINK

27th International Conference on Atomic Physics (ICAP) in Toronto, Canada, 17-22 July 2022 LINK

25th ICOLS, Estes Park, Colorado/USA, June 2023

Online seminars

Virtual Seminar on Precision Physics and Fundamental Symmetries 2020
an initiative for the precision physics and quantum information community every Thursday   LINK

The Virtual AMO Seminar ( Fridays, 7pm (UTC) 
The “Quantum Science Seminar” ( Thursdays, 5pm


A permanent research and teaching assistant position is currently offered at the Physics Department of University of Liège, Belgium. Deadline is 1 May (with a possibility for extension. Please contact Thierry Bastin ASAP for details.

A postdoc position in theoretical many-body quantum physics with Rydberg atoms at the University of Tübingen  For details please contact I Lesanowsky

2 PhD positions in Experimental Quantum Technology with Trapped Rydberg Ions at Stockholm University, Sweden Details or contact

PhD Studentship at University of Sussex in implementing quantum illumination with trapped electrons LINK

A postdoc position at the Centre for Cold Matter at Imperial College London, to work on a new project aimed at cooling molecules to quantum degeneracy  LINK

A postdoc position available at Charles University in Prague (Czech Republic) on Quantum Control of Ion-Electron Recombination. More information HERE  or contact .

4 Postdoc positions in Ultracold Quantum Molecular Systems Group at the Faculty of Physics of the University of Warsaw in Poland. LINK

PhD, postdoc and a research assistant position at the University of Amsterdam (UvA), the Free University of Amsterdam (VU) and the Eindhoven University of Technology (TU/e). Details and contacts can be found HERE or at

PhD studentship: Developing and Operating a Trapped Ion Quantum computer Prototype at University of Sussex (

PhD studentship: Developing Silicon Microchips for Ion Trap Quantum Computers at University of Sussex (

PhD positions for the new IQuAn project on trapped-ion quantum computing in combination with a super computer at the University of Mainz, see, and please contact Ferdinand Schmidt-Kaler ().

Two PhD positions for new projects in the SFB on collective properties of light scattering and heat transport in ion crystals, please contact Ferdinand Schmidt-Kaler ().

Postdoctoral Research Associate and PhD positions are available on quantum simulation and sensing with large beryllium ion crystals at the University of Sydney (LINK). For details please contact Robert Wolf ().

The UC Berkeley ion trap group has postdoctoral positions available to work on quantum information with trapped ions or electrons as well as on rotating ion crystals. For more information, please visit our homepage  and/or contact Hartmut Haeffner via


You can also find postdoc positions in frequency metrology, cold atoms and quantum information


Please sent informations about your publications to

A micro-optical module for multi-wavelength addressing of trapped ions
Matthew L Day, Kaushal Choonee, Zachary Chaboyer, Simon Gross, Michael J Withford, Alastair G Sinclair and Graham D Marshall
Quantum Sci. Technol. 6, 024007 (2021)

An optically heated atomic source for compact ion trap vacuum systems
S. Gao, W. J. Hughes, D. M. Lucas, T. G. Ballance and J. F. Goodwin
Review of Scientific Instruments 92, 033205 (2021)

An analytical approach to symmetry breaking in multipole RF-traps
M Marchenay, J Pedregosa-Gutierrez, M Knoop, M Houssin and C Champenois
Quantum Sci. Technol. 6, 024016 (2021)

Constraining rapidly oscillating scalar dark matter using dynamic decoupling
Shahaf Aharony, Nitzan Akerman, Roee Ozeri, Gilad Perez, Inbar Savoray, and Ravid Shaniv
Phys. Rev. D 103, 075017 (2021)

Constructing quantum circuits with global gates
John van de Wetering
New J. Phys. 23, 043015 (2021)

Creation of double-well potentials in a surface-electrode trap towards a nanofriction model emulator
U Tanaka, M Nakamura, K Hayasaka, A Bautista-Salvador, C Ospelkaus and T E Mehlstäubler
Quantum Sci. Technol. 6, 024010 (2021)

Demonstration of the trapped-ion quantum CCD computer architecture
J. M. Pino, J. M. Dreiling, C. Figgatt, J. P. Gaebler, S. A. Moses, M. S. Allman, C. H. Baldwin, M. Foss-Feig, D. Hayes, K. Mayer, C. Ryan-Anderson & B. Neyenhuis
Nature 592 , 209–213 (2021)

Dielectric microcylinder makes a nanocylindrical trap for atoms and ions
V. Klimov, R. Heydarian, and C. Simovski
Phys. Rev. B 103, 165405 (2021)

Efficient and Robust Certification of Genuine Multipartite Entanglement in Noisy Quantum Error Correction Circuits
Andrea Rodriguez-Blanco, Alejandro Bermudez, Markus Müller, and Farid Shahandeh
PRX Quantum 2, 020304 (2021)

Higher-order and fractional discrete time crystals in clean long-range interacting systems
Andrea Pizzi, Johannes Knolle & Andreas Nunnenkamp
Nature Communications 12 , 1–7 (2021)

Imaging Trapped Ion Structures via Fluorescence Cross-Correlation Detection
Stefan Richter, Sebastian Wolf, Joachim von Zanthier, and Ferdinand Schmidt-Kaler
Phys. Rev. Lett. 126, 173602 (2021)

Materials challenges and opportunities for quantum computing hardware
Nathalie P. de Leon, Kohei M. Itoh, Dohun Kim, Karan K. Mehta, Tracy E. Northup, Hanhee Paik, B. S. Palmer, N. Samarth, Sorawis Sangtawesin, D. W. Steuerman
SCIENCE Vol. 372, Issue 6539, eabb2823 (2021)

Materials challenges for trapped-ion quantum computers
Kenneth R. Brown, John Chiaverini, Jeremy M. Sage & Hartmut Häffner
Nature Reviews Materials , 1–14 (2021)

Measurement of the principal quantum number distribution in a beam of antihydrogen atoms
B. Kolbinger, C. Amsler, S. Arguedas Cuendis, H. Breuker, A. Capon, G. Costantini, P. Dupré, M. Fleck, A. Gligorova, H. Higaki, Y. Kanai, V. Kletzl, N. Kuroda, A. Lanz, M. Leali, V. Mäckel, C. Malbrunot, V. Mascagna, O. Massiczek, Y. Matsuda, D. J. Murtagh, Y. Nagata, A. Nanda, L. Nowak, B. Radics, C. Sauerzopf, M. C. Simon, M. Tajima, H. A. Torii, U. Uggerhøj, S. Ulmer, L. Venturelli, A. Weiser, M. Wiesinger, E. Widmann, T. Wolz, Y. Yamazaki & J. Zmeskal
The European Physical Journal D volume 75, Article number: 91 (2021)

Nuclear clocks for testing fundamental physics
E Peik, T Schumm, M S Safronova, A Pálffy, J Weitenberg and P G Thirolf
Quantum Sci. Technol. 6, 034002 (2021)

Observation of electric-dipole transitions in the laser-cooling candidate Th− and its application for cooling antiprotons
Rulin Tang, Ran Si, Zejie Fei, Xiaoxi Fu, Yuzhu Lu, Tomas Brage, Hongtao Liu, Chongyang Chen, and Chuangang Ning
Phys. Rev. A 103, 042817 (2021)

Polariton blockade in the Jaynes–Cummings–Hubbard model with trapped ions
R Ohira, S Kume, H Takahashi and K Toyoda
Quantum Sci. Technol. 6, 024015 (2021)

Programmable quantum simulations of spin systems with trapped ions
C. Monroe, W. C. Campbell, L.-M. Duan, Z.-X. Gong, A. V. Gorshkov, P. W. Hess, R. Islam, K. Kim, N. M. Linke, G. Pagano, P. Richerme, C. Senko, and N. Y. Yao
Rev. Mod. Phys. 93, 025001 (2021)

Quantum computer based on shuttling trapped ions
Winfried K. Hensinger
Nature 592 , 190–191 (2021)

Rydberg atom-ion collisions in cold environments
Henrik Hirzler and Jesús Pérez-Ríos
Phys. Rev. A 103, 043323 (2021)

Sensitivity to new physics of isotope-shift studies using the coronal lines of highly charged calcium ions
Nils-Holger Rehbehn, Michael K. Rosner, Hendrik Bekker, Julian C. Berengut, Piet O. Schmidt, Steven A. King, Peter Micke, Ming Feng Gu, Robert Müller, Andrey Surzhykov, and José R. Crespo López-Urrutia
Phys. Rev. A 103, L040801 (2021)

Tunable transverse spin–motion coupling for quantum information processing
Adam D West, Randall Putnam, Wesley C Campbell and Paul Hamilton
Quantum Sci. Technol. 6, 024003 (2021)

Ultra-low-vibration closed-cycle cryogenic surface-electrode ion trap apparatus
T. Dubielzig, S. Halama, H. Hahn, G. Zarantonello, M. Niemann, A. Bautista-Salvador and C. Ospelkaus
Review of Scientific Instruments 92, 043201 (2021)


Approximate solutions for the ion-laser interaction in the high intensity regime: Matrix method perturbative analysis
B. M. Villegas-Martínez, H. M. Moya-Cessa, F. Soto-Eguibar

Asymptotic optimality of twist-untwist protocols for Heisenberg scaling in atomic interferometry
T. J. Volkoff, Michael J. Martin

Batch Optimization of Frequency-Modulated Pulse for Robust Two-qubit Gates in Ion Chains
Mingyu Kang, Qiyao Liang, Bichen Zhang, Shilin Huang, Ye Wang, Chao Fang, Jungsang Kim, Kenneth R. Brown

C-band single photons from a trapped ion via two-stage frequency conversion
John Hannegan, Uday Saha, James D. Siverns, Jake Cassell, Edo Waks, Qudsia Quraishi

Cross-beam energy transfer saturation by ion trapping-induced detuning
K. L. Nguyen, L. Yin, B. J. Albright, A. M. Hansen, D. H. Froula, D. Turnbull, R. K. Follett, J. P. Palastro

Demonstration of Shor encoding on a trapped-ion quantum computer
Nhung H. Nguyen, Muyuan Li, Alaina M. Green, Cinthia Huerta Alderete, Yingyue Zhu, Daiwei Zhu, Kenneth R. Brown, Norbert M. Linke

Engineering the Quantum Scientific Computing Open User Testbed (QSCOUT): Design details and user guide
Susan M. Clark, Daniel Lobser, Melissa Revelle, Christopher G. Yale, David Bossert, Ashlyn D. Burch, Matthew N. Chow, Craig W. Hogle, Megan Ivory, Jessica Pehr, Bradley Salzbrenner, Daniel Stick, William Sweatt, Joshua M. Wilson, Edward Winrow, Peter Maunz

Entanglement from tensor networks on a trapped-ion QCCD quantum computer
Michael Foss-Feig, Stephen Ragole, Andrew Potter, Joan Dreiling, Caroline Figgatt, John Gaebler, Alex Hall, Steven Moses, Juan Pino, Ben Spaun, Brian Neyenhuis, David Hayes

Experimental estimation of the quantum Fisher information from randomized measurements
Min Yu, Dongxiao Li, Jingcheng Wang, Yaoming Chu, Pengcheng Yang, Musang Gong, Nathan Goldman, Jianming Cai

Generation of a single ion large oscillator
Ryoichi Saito, Takashi Mukaiyama

Hidden Inverses: Coherent Error Cancellation at the Circuit Level
Bichen Zhang, Swarnadeep Majumder, Pak Hong Leung, Stephen Crain, Ye Wang, Chao Fang, Dripto M. Debroy, Jungsang Kim, Kenneth R. Brown

Ion-Photonic Frequency Qubit Correlations for Quantum Networks
Steven C. Connell, Jordan Scarabel, Elizabeth M. Bridge, Kenji Shimizu, Valdis Blums, Mojtaba Ghadimi, Mirko Lobino, Erik W. Streed

Motion analysis of a trapped ion chain by single photon self-interference
G. Cerchiari, G. Araneda, L. Podhora, L. Slodička, Y. Colombe, R. Blatt

Nanosecond super-resolved imaging of a single cold atom by stimulated emission depletion microscopy
Zhong-Hua Qian, Jin-Ming Cui, Xi-Wang Luo, Yong-Xiang Zheng, Yun-Feng Huang, Ming-Zhong Ai, Ran He, Chuan-Feng Li, Guang-Can Guo

Optical super-resolution sensing of a trapped ion’s wave packet size
Martin Drechsler, Sebastian Wolf, Christian T. Schmiegelow, Ferdinand Schmidt-Kaler

Quantum computation and simulation with vibrational modes of trapped ions
Wentao Chen, Jaren Gan, Jing-Ning Zhang, Dzmitry Matuskevich, Kihwan Kim

Quantum-enhanced bosonic learning machine
Chi-Huan Nguyen, Ko-Wei Tseng, Gleb Maslennikov, H. C. J. Gan, Dzmitry Matsukevich

Reservoir-engineered spin squeezing: macroscopic even-odd effects and hybrid-systems implementations
Peter Groszkowski, Martin Koppenhöfer, Hoi-Kwan Lau, A. A. Clerk

RF-induced heating dynamics of non-crystallized trapped ions
Martin W. van Mourik, Pavel Hrmo, Lukas Gerster, Benjamin Wilhelm, Rainer Blatt, Philipp Schindler, Thomas Monz

Steady state phonon occupation of EIT cooling: higher order calculations
Shuo Zhang, Tian-Ci Tian, Zheng-Yang Wu, Zong-Sheng Zhang, Xin-Hai Wang, Wei Wu, Wan-Su Bao, Chu Guo

Surface science motivated by heating of trapped ions from the quantum ground state
D. A. Hite, K. S. McKay, D. P. Pappas

Tank-Circuit Assisted Coupling Method for Sympathetic Laser Cooling
Bingsheng Tu, Felix Hahne, Ioanna Arapoglou, Alexander Egl, Fabian Heiße, Martin Höcker, Charlotte König, Jonathan Morgner, Tim Sailer, Andreas Weigel, Robert Wolf, Sven Sturm

Time periodicity from randomness in quantum systems
Giacomo Guarnieri, Mark T. Mitchison, Archak Purkayastha, Dieter Jaksch, Berislav Buča, John Goold

Toward simulating quantum field theories with controlled phonon-ion dynamics: A hybrid analog-digital approach
Zohreh Davoudi, Norbert M. Linke, Guido Pagano

Trapped electrons and ions as particle detectors
Daniel Carney, Hartmut Häffner, David C. Moore, Jacob M. Taylor

Two-qubit gates in a trapped-ion quantum computer by engineering motional modes
Ming Li, Jason Amini, Yunseong Nam


Copyright 2021 ITN | Published on behalf of the COST Action Trapped Ions: Progress in classical and quantum applications
Editorial team: Alejandro Bermudez, Martina Knoop

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