Foreword

Dear Ion Trappers,
we’d like to remind you of an exciting opportunity: Frontiers in Quantum Science and Technology has announced a special issue on “Micromotion in Trapped Ion Systems.” Submissions are now open. For more details and submission guidelines, visit Frontiers in Quantum Science and Technology.
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

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 10 to September 12 2024. Detail

ECAMP15 (15th European Conference on Atoms Molecules and Photons), a triennial conference series, will take place in Innsbruck, Austria from June 30th to July 4th, 2025. 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

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

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

Bilayer Crystals of Trapped Ions for Quantum Information Processing
Samarth Hawaldar, Prakriti Shahi, Allison L. Carter, Ana Maria Rey, John J. Bollinger, and Athreya Shankar
Phys. Rev. X 14, 031030 (2024)

Coherent coupling and non-destructive measurement of trapped-ion mechanical oscillators
Pan-Yu Hou, Jenny J. Wu, Stephen D. Erickson, Daniel C. Cole, Giorgio Zarantonello, Adam D. Brandt, Shawn Geller, Alex Kwiatkowski, Scott Glancy, Emanuel Knill, Andrew C. Wilson, Daniel H. Slichter & Dietrich Leibfried
Nature Physics (2024)

Demonstration of Fault-Tolerant Steane Quantum Error Correction
Lukas Postler, Friederike Butt, Ivan Pogorelov, Christian D. Marciniak, Sascha Heußen, Rainer Blatt, Philipp Schindler, Manuel Rispler, Markus Müller, and Thomas Monz
PRX Quantum 5, 030326 (2024)

Determination of the ground-state hyperfine splitting of trapped 171Yb+ ions
Editor’s Pick
J. Z. Han, N. C. Xin, J. W. Zhang, Y. M. Yu, J. G. Li, L. Qian, L. J. Wang
Journal: Applied Physics Letters
Appl. Phys. Lett. 125, 084002 (2024)

Electroweak Nuclear Properties from Single Molecular Ions in a Penning Trap
J. Karthein, S. M. Udrescu, S. B. Moroch, I. Belosevic, K. Blaum, A. Borschevsky, Y. Chamorro, D. DeMille, J. Dilling, R. F. Garcia Ruiz, N. R. Hutzler, L. F. Pašteka, and R. Ringle
Phys. Rev. Lett. 133, 033003 – Published 19 July 2024

Enhancing the electron pair approximation with measurements on trapped-ion quantum computers
Luning Zhao, Qingfeng Wang, Joshua J. Goings, Kyujin Shin, Woomin Kyoung, Seunghyo Noh, Young Min Rhee & Kyungmin Kim
npj Quantum Information volume 10, Article number: 76 (2024)

Individually Addressed Quantum Gate Interactions Using Dynamical Decoupling
M.C. Smith, A.D. Leu, M.F. Gely, and D.M. Lucas
PRX Quantum 5, 030321 (2024)

In situ characterization of qubit-drive phase distortions
M.F. Gely, J.M.A. Litarowicz, A.D. Leu, and D.M. Lucas
Phys. Rev. Applied 22, 024001 (2024)

Integrated photonic structures for photon-mediated entanglement of trapped ions
Knollmann, F. W.; Clements, E.; Callahan, P. T.; Gehl, M.; Hunker, J. D.; Mahony, T.; McConnell, R.; Swint, R.; Sorace-Agaskar, C.; Chuang, I. L.; Chiaverini, J.; Stick, D.
2024
open access Optica Quantum 2(4) 230-244

Lift-connected surface codes
Josias Old, Manuel Rispler and Markus Müller
2024 Quantum Sci. Technol. 9 045012

Long-range-enhanced surface codes
Yifan Hong, Matteo Marinelli, Adam M. Kaufman, and Andrew Lucas
Phys. Rev. A 110, 022607 (2024)

Low cross-talk optical addressing of trapped-ion qubits using a novel integrated photonic chip
Ana S. Sotirova, Bangshan Sun, Jamie D. Leppard, Andong Wang, Mohan Wang, Andres Vazquez-Brennan, David P. Nadlinger, Simon Moser, Alexander Jesacher, Chao He, Fabian Pokorny, Martin J. Booth & Christopher J. Ballance
Light: Science & Applications volume 13, Article number: 199 (2024)

Measuring the Loschmidt Amplitude for Finite-Energy Properties of the Fermi-Hubbard Model on an Ion-Trap Quantum Computer
Kévin Hémery, Khaldoon Ghanem, Eleanor Crane, Sara L. Campbell, Joan M. Dreiling, Caroline Figgatt, Cameron Foltz, John P. Gaebler, Jacob Johansen, Michael Mills, Steven A. Moses, Juan M. Pino, Anthony Ransford, Mary Rowe, Peter Siegfried, Russell P. Stutz, Henrik Dreyer, Alexander Schuckert, and Ramil Nigmatullin
PRX Quantum 5, 030323 (2024)

Noise-Aware Variational Eigensolvers: A Dissipative Route for Lattice Gauge Theories
Jesús Cobos, David F. Locher, Alejandro Bermudez, Markus Müller, and Enrique Rico
PRX Quantum 5, 030340 (2024) –

Photodissociation spectra of single trapped CaOH+ molecular ions
Zhenlin Wu, Stefan Walser, Verena Podlesnic, Mariano Isaza-Monsalve, Elyas Mattivi, Guanqun Mu, René Nardi, Piotr Gniewek, Michał Tomza, Brandon J. Furey, Philipp Schindler
Journal: The Journal of Chemical Physics
J. Chem. Phys. 161, 044304 (2024)

Precise control and non-destructive readout of quantum states of ion motion
Research Briefing
Published: 29 July 2024
Nature Physics (2024)

Preparing pure Ca samples in an ion trap with photoionization and parametric excitations
C.-H. Kuo, Y.-C. Hsiao, C.-Y. Jhang, Y.-D. Chen & S. Tung
Scientific Reports volume 14, Article number: 18524 (2024)

Preserving a qubit during state-destroying operations on an adjacent qubit at a few micrometers distance
Sainath Motlakunta, Nikhil Kotibhaskar, Chung-You Shih, Anthony Vogliano, Darian McLaren, Lewis Hahn, Jingwen Zhu, Roland Hablützel & Rajibul Islam
Nature Communications volume 15, Article number: 6575 (2024)

Prospects of nuclear-coupled-dark-matter detection via correlation spectroscopy of I+2 and Ca+
Eric Madge, Gilad Perez, and Ziv Meir
Phys. Rev. D 110, 015008 – Published 8 July 2024

Randomised benchmarking for universal qudit gates
David Amaro-Alcalá1,2,3, Barry C Sanders1 and Hubert de Guise1,2
New Journal of Physics, Volume 26, July 2024

Realization of a chip-based hybrid trapping setup for 87Rb atoms and Yb+ ion crystals
A. Bahrami, F. Schmidt-Kaler
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 95, 083201 (2024)

Robust and Deterministic Preparation of Bosonic Logical States in a Trapped Ion
V. G. Matsos, C. H. Valahu, T. Navickas, A. D. Rao, M. J. Millican, X. C. Kolesnikow, M. J. Biercuk, and T. R. Tan
Phys. Rev. Lett. 133, 050602 (2024) –

Spin-boson model under dephasing: Markovian versus non-Markovian dynamics
Naushad Ahmad Kamar, Daniel A. Paz, and Mohammad F. Maghrebi
Phys. Rev. B 110, 075126 (2024)

Two-mode squeezing and SU(1,1) interferometry with trapped ions
J. Metzner, A. Quinn, S. Brudney, I. D. Moore, S. C. Burd, D. J. Wineland, and D. T. C. Allcock
Phys. Rev. A 110, 022613 (2024)

Preprints

A Single-Ion Information Engine for Charging Quantum Battery
Authors: Jialiang Zhang, Pengfei Wang, Wentao Chen, Zhengyang Cai, Mu Qiao, Riling Li, Yingye Huang, Haonan Tian, Henchao Tu, Kaifeng Cui, Leilei Yan, Junhua Zhang, Jingning Zhang, Manhong Yung, Kihwan Kim

An iterative transversal CNOT decoder
Authors: Kwok Ho Wan, Mark Webber, Austin G. Fowler, Winfried K. Hensinger

Atomic fluorescence collection into planar photonic devices
Authors: Orion Smedley, Vighnesh Natarajan, Oscar Jaramillo, Hamim Mahmud Rivy, Karan K. Mehta

Constructing the spin-1 Haldane phase on a qudit quantum processor
Authors: C. L. Edmunds, E. Rico, I. Arrazola, G. K. Brennen, M. Meth, R. Blatt, M. Ringbauer

Demonstration of a CAFQA-bootstrapped Variational
Quantum Eigensolver on a Trapped-Ion Quantum Computer
Authors: Qingfeng Wang, Liudmila Zhukas, Qiang Miao, Aniket S. Dalvi, Peter J. Love, Christopher Monroe, Frederic T. Chong, Gokul Subramanian Ravi

Design and demonstration of an operating system for executing applications on quantum network nodes
Authors: Carlo Delle Donne, Mariagrazia Iuliano, Bart van der Vecht, Guilherme Maciel Ferreira, Hana Jirovská, Thom van der Steenhoven, Axel Dahlberg, Matt Skrzypczyk, Dario Fioretto, Markus Teller, Pavel Filippov, Alejandro Rodríguez-Pardo Montblanch, Julius Fischer, Benjamin van Ommen, Nicolas Demetriou, Dominik Leichtle, Luka Music, Harold Ollivier, Ingmar te Raa, Wojciech Kozlowski, Tim Taminiau, Przemysław Pawełczak, Tracy Northup, Ronald Hanson, Stephanie Wehner

Dipolar ordering transitions in many-body quantum optics: Analytical diagrammatic approach to equilibrium quantum spins
Authors: Benedikt Schneider, Ruben Burkard, Beatriz Olmos, Igor Lesanovsky, Björn Sbierski

Electromagnetically-Induced-Transparency Cooling with a Tripod Structure in a Hyperfine Trapped Ion with Mixed-Species Crystals
Authors: J. J. Wu, P. -Y. Hou, S. D. Erickson, A. D. Brandt, Y. Wan, G. Zarantonello, D. C. Cole, A. C. Wilson, D. H. Slichter, D. Leibfried

Electromagnetically-Induced-Transparency Cooling of High-Nuclear-Spin Ions
Authors: Chuanxin Huang, Chenxi Wang, Hongxuan Zhang, Hongyuan Hu, Zuqing Wang, Zhichao Mao, Shijiao Li, Panyu Hou, Yukai Wu, Zichao Zhou, Luming Duan

End-to-End Protocol for High-Quality QAOA Parameters with Few Shots
Authors: Tianyi Hao, Zichang He, Ruslan Shaydulin, Jeffrey Larson, Marco Pistoia

Experiments with the 4D Surface Code on a QCCD Quantum Computer
Authors: Noah Berthusen, Joan Dreiling, Cameron Foltz, John P. Gaebler, Thomas M. Gatterman, Dan Gresh, Nathan Hewitt, Michael Mills, Steven A. Moses, Brian Neyenhuis, Peter Siegfried, David Hayes

Exploring atom-ion Feshbach resonances below the s-wave limit
Fabian Thielemann, Joachim Siemund, Daniel von Schoenfeld, Wei Wu, Pascal Weckesser, Krzysztof Jachymski, Thomas Walker, Tobias Schaetz

Few-Shot, Robust Calibration of Single Qubit Gates Using Bayesian Robust Phase Estimation
Authors: Travis Hurant, Ke Sun, Zhubing Jia, Jungsang Kim, Kenneth R. Brown

Hamiltonian learning for 300 trapped ion qubits with long-range couplings
Authors: S. -A. Guo, Y. -K. Wu, J. Ye, L. Zhang, Y. Wang, W. -Q. Lian, R. Yao, Y. -L. Xu, C. Zhang, Y. -Z. Xu, B. -X. Qi, P. -Y. Hou, L. He, Z. -C. Zhou, L. -M. Duan

High-precision mass measurements of the ground and isomeric states in 124,125Ag
J. Ruotsalainen, D. A. Nesterenko, M. Stryjczyk, A. Kankainen, L. Al Ayoubi, O. Beliuskina, L. Canete, P. Chauveau, R. P. de Groote, P. Delahaye, T. Eronen, M. Flayol, Z. Ge, S. Geldhof, W. Gins, M. Hukkanen, A. Jaries, D. Kahl, D. Kumar, I. D. Moore, S. Nikas, H. Penttilä, D. Pitman-Weymouth, A. Raggio, S. Rinta-Antila, A. de Roubin, M. Vilen, V. Virtanen, M. Winter

Learning symmetry-protected topological order from trapped-ion experiments
Authors: Nicolas Sadoune, Ivan Pogorelov, Claire L. Edmunds, Giuliano Giudici, Giacomo Giudice, Christian D. Marciniak, Martin Ringbauer, Thomas Monz, Lode Pollet

Long-lived metastable-qubit memory
Authors: Xiaoyang Shi, Jasmine Sinanan-Singh, Kyle DeBry, Susanna L. Todaro, Isaac L. Chuang, John Chiaverini

Measuring a single atom’s position with extreme sub-wavelength resolution and force measurements in the yoctonewton range
Authors: P. H. Huber, P. Barthel, Th. Sriarunothai, G. S. Giri, S. Wölk, Ch. Wunderlich

Quantum Computing Universal Thermalization Dynamics in a (2+1)D Lattice Gauge Theory
Authors: Niklas Mueller, Tianyi Wang, Or Katz, Zohreh Davoudi, Marko Cetina

Recoil-free Quantum Gates with Optical Qubits
Authors: Zhao Zhang, Léo Van Damme, Marco Rossignolo, Lorenzo Festa, Max Melchner, Robin Eberhard, Dimitrios Tsevas, Kevin Mours, Eran Reches, Johannes Zeiher, Sebastian Blatt, Immanuel Bloch, Steffen J. Glaser, Andrea Alberti

Scalable High-Dimensional Multipartite Entanglement with Trapped Ions
Authors: Harsh Vardhan Upadhyay, Sanket Kumar Tripathy, Ting Rei Tan, Baladitya Suri, Athreya Shankar

Scaling and assigning resources on ion trap QCCD architectures
Authors: Anabel Ovide, Daniele Cuomo, Carmen G. Almudever

Simulating open-system molecular dynamics on analog quantum computers
Authors: V. C. Olaya-Agudelo, B. Stewart, C. H. Valahu, R. J. MacDonell, M. J. Millican, V. G. Matsos, F. Scuccimarra, T. R. Tan, I. Kassal

Stabilization of cat-state manifolds using nonlinear reservoir engineering
Authors: Ivan Rojkov, Matteo Simoni, Elias Zapusek, Florentin Reiter, Jonathan Home
https://arxiv.org/abs/2408.10801
Solving an Industrially Relevant Quantum Chemistry Problem on Quantum Hardware
Authors: Ludwig Nützel, Alexander Gresch, Lukas Hehn, Lucas Marti, Robert Freund, Alex Steiner, Christian D. Marciniak, Timo Eckstein, Nina Stockinger, Stefan Wolf, Thomas Monz, Michael Kühn, Michael J. Hartmann

Strong coherent ion-electron coupling using a wire data bus
Authors: Baiyi Yu, Ralf Betzholz, Jianming Cai