Foreword

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

YAO2024 (Young Atom Opticians) conference, organised this year by CESQ at the University of Strasbourg, June 30th to July 5th, 2024. Details

28th Central European Workshop on Quantum Optics (CEWQO),  July 1st – 5th, 2024, in Olomouc, Czech Republic

European Frequency and Time Seminar, is a nonprofit intensive full-week seminar intended to provide education and training with lectures and lab sessions in Besancon, France, from July 1-5, 2024. Details

Early Career Conference in Trapped Ions (ECCTI) 2024
ECCTI is intended to connect a broad community with very diverse scientific goals with common technical challenges. The event will have a focus on Atomic Clocks, Quantum Information & Computation, Quantum Simulation, Quantum Technologies, Antimatter Physics, Precision & Molecular Spectroscopy, and Nuclear Physics. The event will take place from July 7-12, 2024, at the Viktor-Franz-Hess Haus in Austria. Details

ICAP 2024: The 28th International Conference on Atomic Physics, July 14-19, 2024 at the Imperial College, London. Details

QSim 2024, the 2nd Annual Conference on Quantum Simulation in Rhode Island, USA, August 12-16,  2024. The conference will be preceded by a 3-day summer school from August 9-11 at the same location. The focus of the summer school will be on many-body systems, combining both theoretical and numerical techniques with examples from quantum hardware experiments. Details

NIST Time and Frequency Seminar covers precision clocks and oscillators, atomic frequency standards, rf and optical synchronization, optical oscillators, quantum information, optical cooling and heating; making precise frequency, time, phase-noise, and jitter measurements; and establishing measurement accuracy and traceability. It will be held will be held at the Boulder, CO campus from August 13-15 2024. Details

15th International Symposium on Electron Beam Ion Sources and Traps (EBIST2024) will be held on 27-30 August 2024 at the Jan Kochanowski University, Kielce, Poland. Details

North American Conference on Trapped Ions (NACTI), UCLA, August 13-16, 2024. Details

IMEKO 2024, 26-29 August 2024, Hamburg. Details

EBIS 2024 in Kielce in the Holy Cross Mountains (Poland) from August 27 to 30, 2024. Details

HCI-21 Sept 1 – Sept 6, 2024 in Amsterdam. Details

QTech 2024: Quantum Technology International conference 2024. This third edition will be held in Berlin, from September 6 to September 12 2024. Details

ECTI 2025, Save the Date: September 8 – 12, 2025 in the Netherlands. More information to follow.

The Greenhorn Meeting is a conference, which targets junior researchers (those who are within the first-half of PhD or in the last year of their masters) working in the research areas of quantum optics, nano optics, atomic physics and ultra-cold atomic gases. It will take place fom September 10th – 12th in Siegen. Details

817 Heraeus seminar on “Precision Atomic Physics Experiments to Probe for New Physics“, 23.-27.9.2024 in Bad Honnef. Details

Quantum Physics with Trapped Particles at Monte Verita, close to Ascona, Switzerland, on October 13-18, 2024. Details

Atomic Clock Ensemble in Space (ACES) Workshop, ESTEC, the Netherlands from the 23rd to the 25th of October 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” (www.amo-seminar.com): Fridays, 7pm (UTC)

The “Quantum Science Seminar” (http://quantumscienceseminar.com/):  on Thursdays, 5 pm

Jobs

A fully funded, 3-year PhD position is available in the laboratory of Metrology, trapped ions and cold molecules at the European Center for Quantum Sciences (CESQ) in Strasbourg, France. This PhD topic concerns the trapping and cooling of dipolar molecular ions as well as their spectroscopic characterization using a frequency-comb laser. More details can be found in attachment or on the Euraxess platform.
Contact: Cyrille Solaro (solaro@unistra.fr)
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 positions available at the University of Padova (Italy) for a new trapped ion experiment. Potential research directions include quantum simulations on ion strings, interfacing of ion traps with photonics chips, and development of surface electrode traps with integrated photonics.
Contact: Dr. Carmelo Mordini (carmelo.mordini@unipd.it)
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

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

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 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

The Ion trap systems team at Infineon is looking for an ion trap development engineer.  This is a full-time, permanent position in Austria with an entry level of 3-5 years.
Details

Publications

Please send information about your publications to iontrap.newsletter@gmail.com

171Yb+ optical clock with systematic uncertainty and absolute frequency measurements
A Tofful, C F A Baynham, E A Curtis, A O Parsons, B I Robertson, M Schioppo, J Tunesi, H S Margolis, R J Hendricks, J Whale, R C Thompson and R M Godun Hide full author list
2024 Metrologia 61 045001

Arbitrary quantum circuits on a fully integrated two-qubit computation register for a trapped-ion quantum processor
N. Pulido-Mateo, H. Mendpara, M. Duwe, T. Dubielzig, G. Zarantonello, L. Krinner, and C. Ospelkaus
Phys. Rev. Research 6, L022067 (2024)

Chiral quantum heating and cooling with an optically controlled ion
Jin-Tao Bu, Jian-Qi Zhang, Ge-Yi Ding, Jia-Chong Li, Jia-Wei Zhang, Bin Wang, Wen-Qiang Ding, Wen-Fei Yuan, Liang Chen, Qi Zhong, Ali Keçebaş, Şahin K. Özdemir, Fei Zhou, Hui Jing & Mang Feng
Light: Science & Applications volume 13, Article number: 143 (2024)

Dynamics of quantum discommensurations in the Frenkel-Kontorova chain
Oksana Chelpanova, Shane P. Kelly, Ferdinand Schmidt-Kaler, Giovanna Morigi, and Jamir Marino
Phys. Rev. B 109, 214107 (2024)

Efficient site-resolved imaging and spin-state detection in dynamic two-dimensional ion crystals
Robert N. Wolf, Joseph H. Pham, Julian Y. Z. Jee, Alexander Rischka, and Michael J. Biercuk
Phys. Rev. Applied 21, 054067 (2024)

Efficient realization of quantum algorithms with qudits
Anastasiia S. Nikolaeva, Evgeniy O. Kiktenko, Aleksey K. Fedorov in EPJ Quantum Technology
Article Open access 26 June 2024

Identification of a natural fieldlike entanglement resource in trapped-ion chains
Natalie Klco and D. H. Beck
Phys. Rev. A 109, 062419 (2024)

Eliminating Qubit-Type Cross-Talk in the 𝑜⁢𝑚⁢𝑔 Protocol
Samuel R. Vizvary, Zachary J. Wall, Matthew J. Boguslawski, Michael Bareian, Andrei Derevianko, Wesley C. Campbell, and Eric R. Hudson
Phys. Rev. Lett. 132, 263201 (2024) –

Improved description of trapped ions as a modular electromechanical system
N. Van Horne, M. Mukherjee
Journal: Journal of Applied Physics
J. Appl. Phys. 135, 154401 (2024)

Integrated visible-light polarization rotators and splitters for atomic quantum systems
Hattori, Ashton; Sneh, Tal; Notaros, Milica; Corsetti, Sabrina; Callahan, Patrick T.; Kharas, Dave; Mahony, Thomas; McConnell, Robert; Chiaverini, John; Notaros, Jelena
2024
Optics Letters 49(7) 1794-1797

Low phase noise cavity transmission self-injection locked diode laser system for atomic physics experiments
Krinner, L.; Dietze, K.; Pelzer, L.; Spethmann, N.; Schmidt, P. O.
2024
open access Optics Express 32(9) 15912-15922

Mode-resolved thermometry of a trapped ion with deep learning
Yi Tao, Ting Chen, Hongyang Wang, Jie Zhang, Ting Zhang, Yi Xie, Pingxing Chen, and Wei Wu
Phys. Rev. A 109, 062434 (2024)

Non-Hermitian CHSH* Game with a Single Trapped-Ion Qubit
Xiao Song, 潇 宋, Teng Liu, 腾 刘, Ji Bian, 纪 边, Pengfei Lu, 鹏飞 陆, Yang Liu, 泱 刘Show full author list
2024 Chinese Phys. Lett. 41 060301

Partial-transpose-guided entanglement classes and minimum noise filtering in many-body Gaussian quantum systems
Boyu Gao and Natalie Klco
Phys. Rev. A 109, 062413 (2024)

Quantum variational solving of nonlinear and multidimensional partial differential equations
Abhijat Sarma, Thomas W. Watts, Mudassir Moosa, Yilian Liu, and Peter L. McMahon
Phys. Rev. A 109, 062616 (2024)

Quantum gates simulation by ions trapped in a linear Paul trap
Basem R. Kazem, Mezher B. Saleh
Journal: AIP Conference Proceedings
AIP Conf. Proc. 3097, 090014 (2024)

Scalable narrow linewidth high power laser for barium ion optical qubits
Ahmadi, Morteza; Dutta, Tarun; Mukherjee, Manas
2024
open access Optics Express 32(10) 17879-17892

Simulating the spin-boson model with a controllable reservoir in an ion trap
G.-X. Wang, Y.-K. Wu, R. Yao, W.-Q. Lian, Z.-J. Cheng, Y.-L. Xu, C. Zhang, Y. Jiang, Y.-Z. Xu, B.-X. Qi, P.-Y. Hou, Z.-C. Zhou, L. He, and L.-M. Duan
Phys. Rev. A 109, 062402 (2024) –

Tripartite quantum Rabi model with trapped Rydberg ions
Thomas J. Hamlyn, Chi Zhang, Igor Lesanovsky, and Weibin Li
Phys. Rev. Research 6, 023223 (2024)

Preprints

A photon-interfaced ten qubit quantum network node
Authors: M. Canteri, Z. X. Koong, J. Bate, A. Winkler, V. Krutyanskiy, B. P. Lanyon

Achieving Cooling Without Repump Lasers Through Ion Motional Heating
Authors: Yue Xiao, Yongxu Peng, Linfeng Chen, Chunhui Li, Zongao Song, Xin Wang, Tao Wang, Yurun Xie, Bin Zhao, Tiangang Yang

Alignment and Optimisation of Optical Tweezers on Trapped Ions
Authors: 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, R. X. Schüssler

Ambiguity Clustering: an accurate and efficient decoder for qLDPC codes
Authors: Stasiu Wolanski, Ben Barber

Demonstration of two-dimensional connectivity for a scalable error-corrected ion-trap quantum processor architecture
Authors: Marco Valentini, Martin W. van Mourik, Friederike Butt, Jakob Wahl, Matthias Dietl, Michael Pfeifer, Fabian Anmasser, Yves Colombe, Clemens Rössler, Philip Holz, Rainer Blatt, Markus Müller, Thomas Monz, Philipp Schindler

Dynamical topology of chiral and nonreciprocal state transfers in a non-Hermitian quantum system
Authors: Pengfei Lu, Yang Liu, Qifeng Lao, Teng Liu, Xinxin Rao, Ji Bian, Hao Wu, Feng Zhu, Le Luo

Entangling four logical qubits beyond break-even in a nonlocal code
Authors: Yifan Hong, Elijah Durso-Sabina, David Hayes, Andrew Lucas

Fast Ground State to Ground State Separation of Small Ion Crystals
Authors: Tyler H. Guglielmo, Dietrich Leibfried, Stephen B. Libby, Daniel H. Slichter

Genons, Double Covers and Fault-tolerant Clifford Gates
Authors: Simon Burton, Elijah Durso-Sabina, Natalie C. Brown

High-performance in-vacuum optical system for quantum optics experiments in a Penning-trap
Authors: Joaquín Berrocal, Daniel Rodríguez

High-precision measurements of the atomic mass and electron-capture decay Q value of 95Tc
Authors: Zhuang Ge, Tommi Eronen, Vasile Alin Sevestrean, Ovidiu Niţescu, Sabin Stoica, Marlom Ramalho, Jouni Suhonen, Antoine de Roubin, Dmitrii Nesterenko, Anu Kankainen, Pauline Ascher, Samuel Ayet San Andres, Olga Beliuskina, Pierre Delahaye, Mathieu Flayol, Mathias Gerbaux, Stéphane Grévy, Marjut Hukkanen, Arthur Jaries, Ari Jokinen, Audric Husson, Daid Kahl, Joel Kostensalo, Jenni Kotila, Iain Moore , et al.

Individually Addressed Entangling Gates in a Two-Dimensional Ion Crystal
Authors: Y. -H. Hou, Y. -J. Yi, Y. -K. Wu, Y. -Y. Chen, L. Zhang, Y. Wang, Y. -L. Xu, C. Zhang, Q. -X. Mei, H. -X. Yang, J. -Y. Ma, S. -A. Guo, J. Ye, B. -X. Qi, Z. -C. Zhou, P. -Y. Hou, L. -M. Duan

Identification of highly-forbidden optical transitions in highly charged ions
Authors: Shuying Chen, Lukas J. Spieß, Alexander Wilzewski, Malte Wehrheim, Kai Dietze, Ivan Vybornyi, Klemens Hammerer, Jose R. Crespo Lopez-Urrutia, Piet O. Schmidt

Interacting Mathieu equation, synchronization dynamics and collision-induced velocity exchange in trapped ions
Authors: Asma Benbouza, Xiaoshui Lin, Jin Ming Cui, Ming Gong

Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits
Authors: Clayton L. Craft, Nicholas J. Barton, Andrew C. Klug, Kenneth Scalzi, Ian Wildemann, Pramod Asagodu, Joseph D. Broz, Nikola L. Porto, Michael Macalik, Anthony Rizzo, Garrett Percevault, Christopher C. Tison, A. Matthew Smith, Michael L. Fanto, James Schneeloch, Erin Sheridan, Dylan Heberle, Andrew Brownell, Vijay S. S. Sundaram, Venkatesh Deenadayalan, Matthew van Niekerk, Evan Manfreda-Schulz, Gregory A. Howland, Stefan F. Preble, Daniel Coleman , et al.

Observation of a non-Hermitian supersonic mode
Authors: Yuxuan Zhang, Juan Carrasquilla, Yong Baek Kim

Phases and phase transition in Grover’s algorithm with systematic noise
Authors: Sasanka Dowarah, Chuanwei Zhang, Vedika Khemani, Michael H. Kolodrubetz

Physical coherent cancellation of optical addressing crosstalk in a trapped-ion experiment
Authors: Jeremy Flannery, Roland Matt, Luca Huber, Kaizhao Wang, Christopher Axline, Robin Oswald, Jonathan P. Home

Polarisation-insensitive state preparation for trapped-ion hyperfine qubits
Authors: A. D. Leu, M. C. Smith, M. F. Gely, D. M. Lucas

Promise of Graph Sparsification and Decomposition for Noise Reduction in QAOA: Analysis for Trapped-Ion Compilations
Authors: Jai Moondra, Philip C. Lotshaw, Greg Mohler, Swati Gupta

Quantum encoder for fixed Hamming-weight subspaces
Authors: Renato M. S. Farias, Thiago O. Maciel, Giancarlo Camilo, Ruge Lin, Sergi Ramos-Calderer, Leandro Aolita

Quantum nuclear dynamics on a distributed set of ion-trap quantum computing systems
Authors: Anurag Dwivedi, A. J. Rasmusson, Philip Richerme, Srinivasan S. Iyengar

Quantum Machine Learning With Canonical Variables
Authors: Jesús Fuentes

Quantum state preparation for multivariate functions
Authors: Matthias Rosenkranz, Eric Brunner, Gabriel Marin-Sanchez, Nathan Fitzpatrick, Silas Dilkes, Yao Tang, Yuta Kikuchi, Marcello Benedetti

Residue Number System (RNS) based Distributed Quantum Addition
Authors: Bhaskar Gaur, Travis S. Humble, Himanshu Thapliyal

Simulation of sympathetic cooling efficiency in a linear Paul trap
Authors: Oskar Sund, Andreas W. Schell

Supervised binary classification of small-scale digits images with a trapped-ion quantum processor
Authors: Ilia V. Zalivako, Alexander I. Gircha, Anastasiia S. Nikolaeva, Denis A. Drozhzhin, Alexander S. Borisenko, Andrei E. Korolkov, Nikita V. Semenin, Kristina P. Galstyan, Pavel A. Kamenskikh, Vasilii N. Smirnov, Mikhail A. Aksenov, Pavel L. Sidorov, Evgeniy O. Kiktenko, Ksenia Yu. Khabarova, Aleksey K. Fedorov, Nikolay N. Kolachevsky, Ilya A. Semerikov

Ultrasensitive single-ion electrometry in a magnetic field gradient
Authors: F. Bonus, C. Knapp, C. H. Valahu, M. Mironiuc, S. Weidt, W. K. Hensinger

Validity of the Lieb-Schultz-Mattis Theorem in Long-Range Interacting Systems
Authors: Yi-Neng Zhou, Xingyu Li