ITN Newsletter – February 2020

ITN Newsletter – February 2020

The COST Action is preparing the program for the period May 2020 until April 2021. If you think, that there is an important workshop/meeting/event/outreach/conference missing for the ion trapper community, do not hesitate to contact Markus Hennrich, the Action Chair.

Dear all,

The COST Action is preparing the program for the period May 2020 until April 2021. If you think, that there is an important workshop/meeting/event/outreach/conference missing for the ion trapper community, do not hesitate to contact Markus Hennrich, the Action chair.

Best regards,

Your editorial team


Precision measurements and traps are among the driving forces of the new Max Planck-RIKEN-PTB Center for Time, Constants and Fundamental Symmetries. More details about this new Center are described HERE. Have a look at the website for a detailed description, job offers, and recent publications!

Regarding our colleagues from the UK, COST informs us that: Brexit Update: UK government has extended the Underwrite Guarantee of Horizon 2020 to COST.  The UK government has committed to provide funding for eligible UK participation in COST Actions until the end of 2020 in case of a no-deal Brexit.

Special Issue in Applied Sciences (Open Access Journal): “Optical Trapping of Ions and Atoms 2020: Novel Advances and Prospects“, now open for submissions.
Guest Editors:  Tobias Schätz, Vladan Vuletic, Michael Drewsen, Jonathan Home, Leon Karpa        Details

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



DPG Spring Meeting “Atomic Physics” 9 – 13 March 2020 in Hannover LINK

CAMEL 16, 15-19 March 2020, Bansko, BG

26th Young Atom Optician (YAO) conference to be held in Aarhus, Denmark 25-29 May 2020 . LINK

52nd EGAS conference, 6-10 July 2020 in Zagreb, Croatia

European Conference on Trapped Ions (ECTI), Djurönäset, Sweden, 13-17 July 2020

13th International Workshop on Non-Neutral Plasmas, Milano, Italy, 13-16 July 2020 LINK

27th International Conference on Atomic Physics (ICAP) held in Toronto, Canada, 19-24 July 2020 LINK

CCMI 2020 – Cold and Controlled Molecules and Ions, 6 – 11 September 2020, Durham University, UK, LINK


A PhD position on the development of a THz reference based on coherent  multiphoton spectroscopy in Marseille. Please contact Caroline Champenois before 8 March 2020.

Two postdoctoral research associate positions to produce trapped, ultracold molecules that can be used to measure the electron’s electric dipole moment, at the Centre for Cold Matter at Imperial College London. Details

Two PhD positions are available in the group of Prof. Stefan Willitsch (University of Basel, Switzerland) on cold ion-molecule hybrid systems. See the group’s website for further information.

Multiple postdoc positions are available in the NIST Ion Storage Group in Colorado, USA.  Topics include quantum simulations in a Penning trap, trapped-ion quantum computing, and coherent control and precision spectroscopy of single molecular ions.  For details please contact John Bollinger.

PhD position (3 years) is available in the laser molecular spectroscopy group of Otto Dopfer at Technische Universität Berlin, Germany. Details

Two postdoc positions in antihydrogen physics with ALPHA at CERN. LINK

PhD project in machine learning with anti-hydrogen under a CDT in AI, Machine learning and Advanced Computing LINK

A postdoc position on the development of a portable Sr+ ion optical clock is open at NRC, Ottawa, Canada. . Details

Postdoc position in the group of Tobias Schaetz at the Albert-Ludwigs-University in Freiburg:

Qsim – Experimental Quantum Simulations based on Arrays of Individually Trapped Ions  LINK

Postdoc position in the group of Tobias Schaetz at the Albert-Ludwigs-University in Freiburg:

TIAMO: Trapping Ions, Atoms and Molecules Optically – interaction in the ultra-cold quantum regime LINK

TRIUMF is looking to hire a post-doctoral researcher (in collaboration with MIT), and a research faculty position.  More details can be found in the following links:  LINK1   and LINK2

A postdoc positions are available at the Stefan Meyer Institute for Subatomic Physics of the Austrian Academy of Sciences in Vienna on physics with trapped charged particles for antihydrogen production (ASACUSA collaboration).  LINK

Assistant Professor in the Quantum Light and Matter group at Durham University. Further details

Two PhD positions are available on fundamental tests based on precision (frequency comb) spectroscopy of trapped He+ ions, molecular hydrogen and quantum-degenerate meta-stable helium at the Vrije Universiteit Amsterdam, The Netherlands. More information at:

A new PhD position is open at the Physics department of University of Mainz on “Scalable Quantum Computing with Trapped Ions”. More information is available HERE. The successful candidate will work on a cutting-edge experiment aiming at the realization of elementary quantum algorithms based on shuttling trapped-ion qubits in segmented microchip traps. If you are interested, please contact Ulrich Poschinger () and Ferdinand Schmidt-Kaler ().

LaserLaB VU Amsterdam, the Netherlands, has an open PhD position on Doppler-free laser spectroscopy of trapped molecular hydrogen ions. LINK

A new PhD position is open at the Physics department of University of Mainz on “Rydberg Ions for Quantum Computation and Quantum Sensing”. More information is available HERE. The successful candidate will work on the experiment that combines exciting aspects of Rydberg physics with trapped-ion qubits. If you are interested, please contact Ferdinand Schmidt-Kaler ().

We are currently seeking to recruit two motivated and enthusiastic postdoctoral research associates to join the ALPHA collaboration at CERN/Switzerland. LINK

The Department of Physics at Yale University is inviting applications for a faculty appointment in the area of experimental quantum science. The position is open at all levels. DETAILS

Postdoc and PhD positions on projects in Quantum Computing and Error Correction as well as Quantum Neural Networks with Trapped Ions are available in the Theoretical Quantum Technology Group of Markus Müller at RWTH Aachen and Forschungszentrum Jülich. Please contact Markus Müller for details.

A PhD position in theoretical many-body physics with Rydberg atoms at University Tübingen with Igor Lesanowsky. Please contact directly at

We are looking for a PhD student from a European country for an ITN network. The person will work on one of the coolest QT-Flagship projects ever, building a laser system for a transportable optical Sr-clock. Details. In 10 years optical clocks will be all over the place.

A PhD position in theoretical quantum physics in Quantum dynamics of impurities with long-range impurity-bath interactions. Details

PhD Position, Scientist and Developer at Swabian Instruments. Details

A postdoc position on Ultra-stable frequency laser development for ground tests of the payload of LISA mission at SYRTE, Paris,France. Please contact

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


Please sent informations about your publications to

β-delayed neutron emission studies of 137,138 I and 144,145 Cs performed with trapped ions

A. Czeszumska, N. D. Scielzo, S. A. Caldwell, J. A. Clark, G. Savard, B. S. Wang, A. Aprahamian, M. T. Burkey, C. J. Chiara, J. Harker, A. F. Levand, S. T. Marley, G. Morgan, J. M. Munson, E. B. Norman, A. Nystrom, R. Orford, S. W. Padgett, A. Pérez Galván, K. S. Sharma, K. Siegl, and S. Y. Strauss

Phys. Rev. C 101, 024312 (2020)

β-delayed-neutron studies of 135,136 Sb and 140I performed with trapped ions
B. S. Wang, S. A. Caldwell, N. D. Scielzo, A. Czeszumska, J. A. Clark, G. Savard, A. Aprahamian, M. T. Burkey, C. J. Chiara, J. Harker, A. F. Levand, S. T. Marley, G. E. Morgan, J. M. Munson, E. B. Norman, A. Nystrom, R. Orford, S. W. Padgett, A. Pérez Galván, K. S. Sharma, K. Siegl, and S. Y. Strauss
Phys. Rev. C 101, 025806 (2020)

Breaking rotational symmetry in a trapped-ion quantum tunneling rotor
Ryutaro Ohira, Takashi Mukaiyama, and Kenji Toyoda
Phys. Rev. A 101, 022106 (2020)

Buffer gas cooling of a trapped ion to the quantum regime
T. Feldker, H. Fürst, H. Hirzler, N. V. Ewald, M. Mazzanti, D. Wiater, M. Tomza & R. Gerritsma
Nature Physics , 1–4, (2020)

Dynamically corrected gates suppressing spatiotemporal error correlations as measured by randomized benchmarking
C. L. Edmunds, C. Hempel, R. J. Harris, V. Frey, T. M. Stace, and M. J. Biercuk
Phys. Rev. Research 2, 013156 (2020)

Dynamics of strongly coupled disordered dissipative spin-boson systems
Eliana Fiorelli, Pietro Rotondo, Federico Carollo, Matteo Marcuzzi, and Igor Lesanovsky
Phys. Rev. Research 2, 013198 (2020)

First steps in the development of the Multi Ion Reflection Apparatus for Collinear Laser Spectroscopy
S. Sels, P. Fischer, H. Heylen, V. Lagaki, S. Lechner, F.M. Maier, P. Plattner, M. Rosenbusch, F. Wienholtz, R.N. Wolf, W. Nörthershäuser, L. Schweikhard, S. Malbrunot-Ettenauer
Nucl. Instrum. Meth. B 463, 310-314 (2020)

Formation of ultracold ion pairs through long-range Rydberg molecules
Michael Peper and Johannes Deiglmayr
2020 J. Phys. B: At. Mol. Opt. Phys. 53 064001

Generation of quasi-rectangle-states of the vibrational motion of an ion
Irán Ramos-Prieto, Iván Rincón, Víctor Arrizon and Héctor M Moya-Cessa
2020 Phys. Scr. 95 054002

Hybrid Microwave-Radiation Patterns for High-Fidelity Quantum Gates with Trapped Ions
I. Arrazola, M.B. Plenio, E. Solano, and J. Casanova
Phys. Rev. Applied 13, 024068 (2020)

Hyperfine Averaging by Dynamic Decoupling in a Multi-Ion Lutetium Clock
R. Kaewuam, T. R. Tan, K. J. Arnold, S. R. Chanu, Zhiqiang Zhang, and M. D. Barrett
Phys. Rev. Lett. 124, 083202 (2020)

Improved Lieb-Robinson bound for many-body Hamiltonians with power-law interactions
Dominic V. Else, Francisco Machado, Chetan Nayak, and Norman Y. Yao
Phys. Rev. A 101, 022333 (2020)

Improved stability of multi-reflection time-of-flight mass spectrometers through passive and active voltage stabilization
F. Wienholtz, K. Blaum, J. Karthein, D. Lunney, S. Malbrunot-Ettenauer, V. Manea, M. Mougeot, L. Schweikhard, T. Steinsberger, R.N. Wolf
Nucl. Instrum. Meth. B 463, 348-356 (2020)

Ion Imaging via Long-Range Interaction with Rydberg Atoms
Christian Gross, Thibault Vogt, and Wenhui Li
Phys. Rev. Lett. 124, 053401 (2020)

Light of Two Atoms in Free Space: Bunching or Antibunching?
Sebastian Wolf, Stefan Richter, Joachim von Zanthier, and Ferdinand Schmidt-Kaler
Phys. Rev. Lett. 124, 063603 (2020)

Machine-Designed Sensor to Make Optimal Use of Entanglement-Generating Dynamics for Quantum Sensing
Simon A. Haine and Joseph J. Hope
Phys. Rev. Lett. 124, 060402 (2020)

Machine learning design of a trapped-ion quantum spin simulator
Yi Hong Teoh, Marina Drygala, Roger G Melko and Rajibul Islam
2020 Quantum Sci. Technol. 5 024001  

Making ions cooler
Carlo Sias
Nature Physics , 1–2

Optical Traps for Sympathetic Cooling of Ions with Ultracold Neutral Atoms
J. Schmidt, P. Weckesser, F. Thielemann, T. Schaetz, and L. Karpa
Phys. Rev. Lett. 124, 053402 (2020)

Origin of the slow growth of entanglement entropy in long-range interacting spin systems
Alessio Lerose and Silvia Pappalardi
Phys. Rev. Research 2, 012041(R) (2020)

Phase-Modulated Entangling Gates Robust to Static and Time-Varying Errors
Alistair R. Milne, Claire L. Edmunds, Cornelius Hempel, Federico Roy, Sandeep Mavadia, and Michael J. Biercuk
Phys. Rev. Applied 13, 024022 (2020)

Phase protection of Fano-Feshbach resonances
Alexander Blech, Yuval Shagam, Nicolas Hölsch, Prerna Paliwal, Wojciech Skomorowski, John W. Rosenberg, Natan Bibelnik, Oded Heber, Daniel M. Reich, Edvardas Narevicius & Christiane P. Koch
Nature Communications 11 , 1–7

Quantum collapse-revival effect in a supersymmetric Jaynes–Cummings model and its possible application in supersymmetric qubits
Shi Yao Chong and Jian Qi Shen
2020 Phys. Scr. 95 055104

Quantum close encounters of an ultra-cooled ion
Research Highlights
Nature 578 , 194–194

Real-time calibration with spectator qubits
Swarnadeep Majumder, Leonardo Andreta de Castro & Kenneth R. Brown
npj Quantum Information 6 , 1–9

Second-Scale Coherence Measured at the Quantum Projection Noise Limit with Hundreds of Molecular Ions
Yan Zhou, Yuval Shagam, William B. Cairncross, Kia Boon Ng, Tanya S. Roussy, Tanner Grogan, Kevin Boyce, Antonio Vigil, Madeline Pettine, Tanya Zelevinsky, Jun Ye, and Eric A. Cornell
Phys. Rev. Lett. 124, 053201 (2020)

Short-time expansion of Heisenberg operators in open collective quantum spin systems
Michael A. Perlin and Ana Maria Rey
Phys. Rev. A 101, 023601 (2020)

The Performance of the Cryogenic Buffer-Gas Stopping Cell of SHIPTRAP
O. Kaleja, B. Andjelić, K. Blaum, M.Block, P. Chhetri, C. Droese, Ch.E. Düllmann, M. Eibach, S. Eliseev, J. Even, S. Götz, F. Giacoppo, N. Kalantar-Nayestanaki, M. Laatiaoui, E. Minaya Ramirez, A. Mistry, T. Murböck, S.Raeder, L. Schweikhard, P.G. Thirolf,
Nucl. Instrum. Meth. B 463, 280-285 (2020)

Tracking the Dynamics of an Ideal Quantum Measurement
Fabian Pokorny, Chi Zhang, Gerard Higgins, Adán Cabello, Matthias Kleinmann, and Markus Hennrich
Phys. Rev. Lett. 124, 080401 (2020)

Versatile surface ion trap with fork junction for effective cooling
Xinfang Zhang, Baoquan Ou, Ting Chen, Yi Xie, Wei Wu and Pingxing Chen
2020 Phys. Scr. 95 045103  

YbH+ formation in an ytterbium ion trap

Thai M. Hoang, Yuan-Yu Jau, Richard Overstreet, and Peter D. D. Schwindt

Phys. Rev. A 101, 022705 (2020)


Quantum entanglement between an atom and a molecule,
Yiheng Lin, David R. Leibrandt, Dietrich Leibfried, Chin-wen Chou

Concept notes on an experiment to tackle an astrophysical problem, requiring an ion trap and several lasers: Measurement of few-thousand second lifetimes in S II
Elmar Träbert

Overdamped dynamics of a Brownian particle levitated in a Paul trap
Conangla, G. P., Nwaigwe, D., Wehr, J., & Rica, R. A.

A high fidelity light-shift gate for clock-state qubits
C. H. Baldwin, B. J. Bjork, M. Foss-Feig, J. P. Gaebler, D. Hayes, M. G. Kokish, C. Langer, J. A. Sedlacek, D. Stack, G. Vittorini

Anisotropy-mediated reentrant localization
Xiaolong Deng, Alexander L. Burin, Ivan M. Khaymovich

Deterministic correction of qubit loss
Roman Stricker, Davide Vodola, Alexander Erhard, Lukas Postler, Michael Meth, Martin Ringbauer, Philipp Schindler, Thomas Monz, Markus Müller, Rainer Blatt

Efficient Qubit Routing for a Globally Connected Trapped Ion Quantum Computer
Mark Webber, Steven Herbert, Sebastian Weidt, Winfried Hensinger

Efficient sideband cooling protocol for long trapped-ion chains
J. -S. Chen, K. Wright, N. C. Pisenti, D. Murphy, K. M. Beck, K. Landsman, J. M. Amini, Y. Nam

Electro-optical ion trap for experiments with atom-ion quantum hybrid systems
Elia Perego, Lucia Duca, Carlo Sias

Fast dynamical exchange cooling with trapped ions
Tobias Sägesser, Roland Matt, Robin Oswald, Jonathan P. Home

Finite-system Multicriticality at the Superradiant Quantum Phase Transition
Han-Jie Zhu, Kai Xu, Guo-Feng Zhang, Wu-Ming Liu

Functional surface ion traps on a 12-inch glass wafer for quantum applications
J Tao, J Likforman, P Zhao, H. Li, T Henner, Y Lim, W Seit, Luca Guidoni, C Tan

High-precision Q-value measurement confirms the potential of 135Cs for antineutrino-mass detection
A. de Roubin, J. Kostensalo, T. Eronen, L. Canete, R. P. de Groote, A. Jokinen, A. Kankainen, D. A. Nesterenko, I. D. Moore, S. Rinta-Antila, J. Suhonen, M. Vilén

Heat flow reversal in a trapped-ion simulator
P. U. Medina González, I. Ramos Prieto, B. M. Rodríguez-Lara

High-precision mass spectrometer for light ions
Fabian Heiße, Sascha Rau, Florian Köhler-Langes, Wolfgang Quint, Günter Werth, Sven Sturm, Klaus Blaum

Integrated optical multi-ion quantum logic
Karan K. Mehta, Chi Zhang, Maciej Malinowski, Thanh-Long Nguyen, Martin Stadler, Jonathan P. Home

Multi-channel Opto-mechanical Switch and LockingSystem for Wavemeters
Moji Ghadimi, Elizabeth M. Bridge, Jordan Scarabel, Steven Connell, Kenji Shimizu, Erik Streed, Mirko Lobino

Precision measurements of the fundamental properties of the proton and antiproton
Christian Smorra, Andreas Mooser

Probing surface charge densities on optical fibers with a trapped ion
Florian R. Ong, Klemens Schüppert, Pierre Jobez, Markus Teller, Ben Ames, Dario A. Fioretto, Konstantin Friebe, Moonjoo Lee, Yves Colombe, Rainer Blatt, Tracy E. Northup

Properties of phonon modes of ion trap quantum computer in the Aubry phase
Justin Loye, José Lages, Dima L. Shepelyansky

Prospect for precision quantum logic spectroscopy of vibrational overtone transitions in molecular oxygen ions
Fabian Wolf, Jan C. Heip, Maximilian J. Zawierucha, Chunyan Shi, Silke Ospelkaus, Piet O. Schmidt

Quantum scrambling and the growth of mutual information
Akram Touil, Sebastian Deffner

Quantum walks and Dirac cellular automata on a programmable trapped-ion quantum computer
C. Huerta Alderete, Shivani Singh, Nhung H. Nguyen, Daiwei Zhu, Radhakrishnan Balu, Christopher Monroe, C. M. Chandrashekar, Norbert M. Linke

Relating relative Rényi entropies and Wigner-Yanase-Dyson skew information to generalized multiple quantum coherences
Diego Paiva Pires, Augusto Smerzi, Tommaso Macrì

Smooth bang-bang shortcuts to adiabaticity for atomic transport in a moving harmonic trap
Yongcheng Ding, Tangyou Huang, Minjia Hao, Xi Chen

Sympathetic cooling of 113Cd+ by laser-cooled 40Ca+ in a linear Paul trap for Microwave Ion Clocks
J. Z. Han, H. R. Qin, L. M. Guo, N. C. Xin, H. X. Hu, Y. M. Yu, V. A. Dzuba, J. W. Zhang, L. J. Wang


Copyright 2020 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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