News
Remembering Charlotte Froese Fischer (1929-2024)
It is with heavy hearts that we share the news of Charlotte Fischer’s passing, who was a beloved member of our community.
Charlotte Froese Fischer, born in 1929 in Donetsk (present-day Ukraine) and raised in Canada, passed away on February 8, 2024, at the age of 94. She was a distinguished physicist, known for her groundbreaking work in computational quantum theory. Fischer earned her BA and MA at the University of British Columbia (UBC) before completing her PhD at Cambridge, where she studied under Douglas Hartree and Paul Dirac. She made significant contributions to the development of computer-based Hartree-Fock calculations, pioneering the field during her PhD studies, introducing courses on numerical analysis and computing at UBC and becoming the first female scientist to be awarded an Alfred P. Sloan Fellowship at Harvard (1963-1964). Fischer’s research spanned several decades and encompassed over 350 papers, including three most recently in 2023. She leaves behind a legacy of innovation and excellence in the scientific community (Source: https://www.jiscmail.ac.uk/cgi-bin/wa-jisc.exe?A2=MOLECULAR-DYNAMICS-NEWS;76f7f578.2402).
We extend our deepest condolences to Ms. Fischer’s family and friends during this difficult time. Our thoughts and prayers are with you as you navigate through this period of grief and loss.
Please continue to send us your thoughts, events, news, seminars, jobs, and publications to iontrap.newsletter@gmail.com so that we can keep each other informed.
Events
QCTiP 2024 (Quantum Computing Theory in Practice) conference, organized by the Quantum Software Lab at the University of Edinburgh, is planned for April 16th to 18th, 2024. Details
Young Researchers School on Topological aspects of low-dimensional quantum physics is a meeting for young researchers, designed by young researchers, accessible to PhD students in theoretical physics as well as to exceptional MSc students. April 21-27, 2024, Maynooth University, Ireland. Details
Workshop on Quantum Mixtures of Atoms and Ions, Amsterdam will take place rom June 11-13, 2024. The conference aims to bring together experts in the field of cold and ultracold mixtures of atoms and ions and will cover various applications of these systems, including quantum chemistry, quantum impurity physics, ultracold buffer gas cooling, Feshbach resonances, quantum information and spin dynamics. Details
Quantum meets ’24 is a co-created collection of free events presented by Quantum Delta NL from June 11-13, 2024 in Amsterdam, the Netherlands. 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, 14.-19.7.2024 at the Imperial College, London. 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 postdoc position is available from April 1st 2024 at Imperial College, London. The project is to use a trapped electron for tabletop astroparticle physics, including the direct detection of dark matter and microwave single photon counting for dark matter axion searches.
Contact: Jack Devlin (j.devlin11@imperial.ac.uk).
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)
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 research group of Christian Ospelkaus at Leibniz University of Hannover, Germany, offers a PhD position in the field of surface electrode trap design for quantum computing.
Contact: Dr. Christian Ospelkaus (christian.ospelkaus@iqo.uni-hannover.de)
Details
PhD position in available at TU Berlin fully funded by the German Science Foundation for 3 years.
The project deals with the vibrational and electronic spectroscopy of diamondoid cation and their clusters in cryogenic ion traps, which are relevant in materials science, astrochemistry, organic chemistry, and theoretical chemistry.
Contact: Dr. Otto Dopfer (dopfer@physik.tu-berlin.de)
Details
PhD position in QUantum-Enhanced Sensing with Trapped IONs (QUESTIONs) at the Vrije Universiteit Amsterdam in the group of Dr. Laura Dreissen. In the project you will develop a trapped-ion system based on Ba+ for quantum sensing and metrology using entangled states.
Contact: Dr. Laura S. Dreissen (l.s.dreissen@vu.nl)
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)
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
Various positions at ARCNL
ARCNL is a public-private partnership between the Foundation for Fundamental Research on Matter (FOM), the University of Amsterdam (UvA), the VU University Amsterdam (VU) and the semiconductor equipment manufacturer ASML. ARCNL is seeking candidates trained in experimental physics, chemistry, materials science or engineering with an interest in cutting-edge research, combining fundamental and applied aspects.
Details
Publications
Please sent information about your publications to iontrap.newsletter@gmail.com
A simplified Mølmer-Sørensen gate for the trapped ion quantum computer
Hiroo Azuma
2024 Phys. Scr.
Atomic mass determination of uranium-238
Kathrin Kromer, Chunhai Lyu, Jacek Bieroń, Menno Door, Lucia Enzmann, Pavel Filianin, Gediminas Gaigalas, Zoltán Harman, Jost Herkenhoff, Wenjia Huang, Christoph H. Keitel, Sergey Eliseev, and Klaus Blaum
Phys. Rev. C 109, L021301 (2024) –
Construction of two-qubit gates using Gate
M Karthick Selvan and S Balakrishnan
2024 Phys. Scr. 99 035113
Efficient bosonic nonlinear phase gates
Kimin Park & Radim Filip
npj Quantum Information volume 10, Article number: 25 (2024)
Fast generation of spin squeezing via resonant spin-boson coupling
Diego Barberena, Sean R Muleady, John J Bollinger, Robert J Lewis-Swan and Ana Maria Rey
2024 Quantum Sci. Technol. 9 025013
R. Bhandari, G. Bollen, T. Brunner, N. D. Gamage, A. Hamaker, Z. Hockenbery, M. Horana Gamage, D. K. Keblbeck, K. G. Leach, D. Puentes, M. Redshaw, R. Ringle, S. Schwarz, C. S. Sumithrarachchi, and I. Yandow
Phys. Rev. C 109, L022501 (2024)
Interaction graph engineering in trapped-ion quantum simulators with global drives
Antonis Kyprianidis, A J Rasmusson and Philip Richerme
2024 New J. Phys. 26 023033
Tianluo Luo, Zhencen He, Zhihao Yang, Shuyu Zhang, and Zhimin Hu
Phys. Rev. A 109, 022815 (2024)
D. M. Fairbank, A. L. Banducci, R. W. Gunkelman, J. B. VanArsdale, and S. M. Brewer
Phys. Rev. A 109, 012809 (2024) –
Measurement-Free Fault-Tolerant Quantum Error Correction in Near-Term Devices
Sascha Heußen, David F. Locher, and Markus Müller
PRX Quantum 5, 010333 (2024)
Non-Abelian topological order and anyons on a trapped-ion processor
Mohsin Iqbal, Nathanan Tantivasadakarn, Ruben Verresen, Sara L. Campbell, Joan M. Dreiling, Caroline Figgatt, John P. Gaebler, Jacob Johansen, Michael Mills, Steven A. Moses, Juan M. Pino, Anthony Ransford, Mary Rowe, Peter Siegfried, Russell P. Stutz, Michael Foss-Feig, Ashvin Vishwanath & Henrik Dreyer
Nature volume 626, pages 505–511 (2024)
Optimized Bayesian system identification in quantum devices
Thomas M. Stace, Jiayin Chen, Li Li, Viktor S. Perunicic, Andre R. R. Carvalho, Michael Hush, Christophe H. Valahu, Ting Rei Tan, and Michael J. Biercuk
Phys. Rev. Applied 21, 014012 (2024)
Precision measurement of M1 optical clock transition in Ni12+
Shaolong Chen, Zhiqiang Zhou, Jiguang Li, Tingxian Zhang, Chengbin Li, Tingyun Shi, Yao Huang, Kelin Gao, and Hua Guan
Phys. Rev. Research 6, 013030 (2024) –
Protecting expressive circuits with a quantum error detection code
Chris N. Self, Marcello Benedetti & David Amaro
Nature Physics volume 20, pages 219–224 (2024)
Quantum-parallel vectorized data encodings and computations on trapped-ion and transmon QPUs
Jan Balewski, Mercy G. Amankwah, Roel Van Beeumen, E. Wes Bethel, Talita Perciano & Daan Camps
Scientific Reports volume 14, Article number: 3435 (2024)
Wes Johnson, Athreya Shankar, John Zaris, John J. Bollinger, and Scott E. Parker
Phys. Rev. A 109, L021102 (2024) –
Rapid exchange cooling with trapped ions
Spencer D. Fallek, Vikram S. Sandhu, Ryan A. McGill, John M. Gray, Holly N. Tinkey, Craig R. Clark & Kenton R. Brown
Nature Communications volume 15, Article number: 1089 (2024) Cite this article
L. Feng, Y.-Y. Huang, Y.-K. Wu, W.-X. Guo, J.-Y. Ma, H.-X. Yang, L. Zhang, Y. Wang, C.-X. Huang, C. Zhang, L. Yao, B.-X. Qi, Y.-F. Pu, Z.-C. Zhou & L.-M. Duan
Nature Communications volume 15, Article number: 204 (2024)
Fabian Wolf
Phys. Rev. Lett. 132, 083202 (2024)
Surface trap with adjustable ion couplings for scalable and parallel gates
Y. Suleimen, A. Podlesnyy, L. A. Akopyan, N. Sterligov, O. Lakhmanskaya, E. Anikin, A. Matveev, and K. Lakhmanskiy
Phys. Rev. A 109, 022605 (2024) –
Topological matter created on a quantum chip produces quasiparticles with computing power
Nature News and Views, February 2024
Towards experimental classical verification of quantum computation
Roman Stricker, Jose Carrasco, Martin Ringbauer, Lukas Postler, Michael Meth, Claire Edmunds, Philipp Schindler, Rainer Blatt, Peter Zoller, Barbara Kraus and Thomas Monz Hide full author list
2024 Quantum Sci. Technol. 9 02LT01
Trapping and Sympathetic Cooling of Conformationally Selected Molecular Ions
Lei Xu, Jutta Toscano, and Stefan Willitsch
Phys. Rev. Lett. 132, 083001 (2024)
Tunable quantum simulation of spin models with a two-dimensional ion crystal
Mu Qiao, Zhengyang Cai, Ye Wang, Botao Du, Naijun Jin, Wentao Chen, Pengfei Wang, Chunyang Luan, Erfu Gao, Ximo Sun, Haonan Tian, Jingning Zhang & Kihwan Kim
Nature Physics (2024)
Universal quantum computing with qubits embedded in trapped-ion qudits
Anastasiia S. Nikolaeva, Evgeniy O. Kiktenko, and Aleksey K. Fedorov
Phys. Rev. A 109, 022615 (2024) –
Variational quantum simulation of U(1) lattice gauge theories with qudit systems
Pavel P. Popov, Michael Meth, Maciej Lewestein, Philipp Hauke, Martin Ringbauer, Erez Zohar, and Valentin Kasper
Phys. Rev. Research 6, 013202 (2024)
Preprints
An architecture for two-qubit encoding in neutral ytterbium-171 atoms
Authors: Zhubing Jia, William Huie, Lintao Li, Won Kyu Calvin Sun, Xiye Hu, Aakash, Healey Kogan, Abhishek Karve, Jong Yeon Lee, Jacob P. Covey
An ion trap design for a space-deployable strontium-ion optical clock
Authors: Alessio Spampinato, Jonathan Stacey, Sean Mulholland, Billy I. Robertson, Hugh A. Klein, Guilong Huang, Geoffrey P. Barwood, Patrick Gill
Building and characterizing a stylus ion-trap system
Tai-Hao Cui, Ya-Qi Wei, Ji Li, Quan Yuan, Shuang-Qing Dai, Pei-Dong Li, Fei Zhou, Jian-Qi Zhang, Zhu-Jun Zheng, Liang ChenShow full author list
2024 Chinese Phys. B
Chaotic scattering in ultracold atom-ion collisions
Authors: Meirav Pinkas, Jonathan Wengrowicz, Nitzan Akerman, Roee Ozeri
Dark resonance spectra of trapped ions under the influence of micromotion
Authors: Nicolás Adrián Nuñez Barreto, Muriel Bonetto, Marcelo Alejandro Luda, Cecilia Cormick, Christian Tomás Schmiegelow
Authors: Sungjoo Lim, Seunghyun Baek, Jacob Withlow, Marissa D’Onofrio, Tianyi Chen, Samuel Phiri, Stphen Crain, Kenneth R. Brown, Jungsang Kim, Junki Kim
Digital quantum simulation of a (1+1)D SU(2) lattice gauge theory with ion qudits
Authors: Giuseppe Calajò, Giuseppe Magnifico, Claire Edmunds, Martin Ringbauer, Simone Montangero, Pietro Silvi
Dynamical quantum maps for single-qubit gates under non-Markovian phase noise
Authors: J. M. Sánchez Velázquez, A. Steiner, R. Freund, M. Guevara-Bertsch, Ch. D. Marciniak, T. Monz, A. Bermudez
Dynamics of quantum discommensurations in the Frenkel-Kontorova chain
Authors: Oksana Chelpanova, Shane P. Kelly, Ferdinand Schmidt-Kaler, Giovanna Morigi, Jamir Marino
Electronic structure of ground and low-lying excited states of BaLi+ molecular ion: spin-orbit effect, radiative lifetimes and Franck-Condon factor
Sana Akkari, Wissem Zrafi, Hela Ladjimi, Mohamed Bejaoui, Jamila Dhiflaoui and Hamid Berriche
2024 Phys. Scr. 99 035403
Entanglement-enhanced quantum metrology: from standard quantum limit to Heisenberg limit
Authors: Jiahao Huang, Min Zhuang, Chaohong Lee
Experimental implementation of an efficient test of quantumness
Laura Lewis, Daiwei Zhu, Alexandru Gheorghiu, Crystal Noel, Or Katz, Bahaa Harraz, Qingfeng Wang, Andrew Risinger, Lei Feng, Debopriyo Biswas, Laird Egan, Thomas Vidick, Marko Cetina, and Christopher Monroe
Phys. Rev. A 109, 012610 (2024)
High Resolution Rovibrational and Rotational Spectroscopy of H2CCCH+
Authors: Weslley Guilherme Dias de Paiva Silva, Divita Gupta, Eline Plaar, José Luis Doménech, Stephan Schlemmer, Oskar Asvany
Individual addressing and state readout of trapped ions utilizing rf micromotion
Authors: Nathan K Lysne, Justin F Niedermeyer, Andrew C Wilson, Daniel H Slichter, Dietrich Leibfried
In-situ-tunable spin-spin interactions in a Penning trap with in-bore optomechanics
Authors: Joseph H. Pham, Julian Y. Z. Jee, Alexander Rischka, Michael J. Biercuk, Robert N. Wolf
Harnessing the Quantum Zeno Effect: A New Approach to Ion Trapping
Authors: Varqa Abyaneh
Long-sought isomer turns out to be the ground state of 76Cu
Authors: L. Canete, S. Giraud, A. Kankainen, B. Bastin, F. Nowacki, P. Ascher, T. Eronen, V. Girard Alcindor, A. Jokinen, A. Khanam, I. D. Moore, D. Nesterenko, F. De Oliveira, H. Penttilä, C. Petrone, I. Pohjalainen, A. De Roubin, V. Rubchenyaa, M. Vilen, J. Äystö
Microgram BaCl2 Ablation Targets for Trapped Ion Experiments
Authors: Noah Greenberg, Akbar Jahangiri Jozani, Collin J. C. Epstein, Xinghe Tan, Rajibul Islam, Crystal Senko
Authors: Raymond A. Haltli, Eric Ou, Christopher D. Nordquist, Susan M. Clark, Melissa C. Revelle
Motional state analysis of a trapped ion by ultra-narrowband composite pulses
Authors: Marion Mallweger, Milena Guevara-Bertsch, Boyan T. Torosov, Robin Thomm, Natalia Kuk, Harry Parke, Christian F. Roos, Gerard Higgins, Markus Hennrich, Nikolay V. Vitanov
Multi-zone trapped-ion qubit control in an integrated photonics QCCD device
Authors: Carmelo Mordini, Alfredo Ricci Vasquez, Yuto Motohashi, Mose Müller, Maciej Malinowski, Chi Zhang, Karan K. Mehta, Daniel Kienzler, Jonathan P. Home
Nanomechanically Induced Transparency
Authors: E. C. Diniz, O. P. de Sá Neto
Non-Abelian vibron dynamics in trapped-ion arrays
Authors: L. Timm, H. Weimer, L. Santos
Observation of quantum strong Mpemba effect
Authors: Jie Zhang, Gang Xia, Chun-Wang Wu, Ting Chen, Qian Zhang, Yi Xie, Wen-Bo Su, Wei Wu, Cheng-Wei Qiu, Ping-xing Chen, Weibin Li, Hui Jing, Yan-Li Zhou
Authors: Boyu Gao, Natalie Klco
Authors: Christoph Schweiger, Martin Braß, Vincent Debierre, Menno Door, Holger Dorrer, Christoph E. Düllmann, Christian Enss, Pavel Filianin, Loredana Gastaldo, Zoltán Harman, Maurits W. Haverkort, Jost Herkenhoff, Paul Indelicato, Christoph H. Keitel, Kathrin Kromer, Daniel Lange, Yuri N. Novikov, Dennis Renisch, Alexander Rischka, Rima X. Schüssler, Sergey Eliseev, Klaus Blaum
Robust and fast microwave-driven quantum logic for trapped-ion qubits
Authors: M. A. Weber, M. F. Gely, R. K. Hanley, T. P. Harty, A. D. Leu, C. M. Löschnauer, D. P. Nadlinger, D. M. Lucas
Scattering wave packets of hadrons in gauge theories: Preparation on a quantum computer
Authors: Zohreh Davoudi, Chung-Chun Hsieh, Saurabh V. Kadam
Simulating the spin-boson model with a controllable reservoir in an ion trap
Authors: 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, L. -M. Duan
Shuttling for Scalable Trapped-Ion Quantum Computers
Authors: Daniel Schoenberger, Stefan Hillmich, Matthias Brandl, Robert Wille
Stressing Out Modern Quantum Hardware: Performance Evaluation and Execution Insights
Authors: Aliza U. Siddiqui, Kaitlin Gili, Chris Ballance
Thermal transport through a single trapped ion under strong laser illumination
Authors: T. Tassis, F. Brito, F. L. Semião
TITAN: A Distributed Large-Scale Trapped-Ion NISQ Computer
Authors: Cheng Chu, Zhenxiao Fu, Yilun Xu, Gang Huang, Hausi Muller, Fan Chen, Lei Jiang
Authors: Ilia V. Zalivako, Anastasiia S. Nikolaeva, Alexander S. Borisenko, Andrei E. Korolkov, Pavel L. Sidorov, Kristina P. Galstyan, Nikita V. Semenin, Vasilii N. Smirnov, Mikhail A. Aksenov, Konstantin M. Makushin, Evgeniy O. Kiktenko, Aleksey K. Fedorov, Ilya A. Semerikov, Ksenia Yu. Khabarova, Nikolay N. Kolachevsky
Trapped-ion toolbox to simulate quantum Otto heat engines
Authors: Rogério Jorge de Assis, Ciro Micheletti Diniz, Norton Gomes de Almeida, Celso Jorge Villas-Bôas