Postdoctoral Fellow in experimental quantum computing with Rydberg ions

Department of Physics is one of the biggest departments within the Faculty of Science and supports a broad range of fundamental experimental and theoretical physics research. It has about 250 employees, of which 95 are Ph.D. students. Many have been internationally recruited. The Department is part of the AlbaNova University Center which houses the Department of Astronomy, the Physics Departments at the Royal Institute of Technology (KTH), and the Nordic Institute for Theoretical Physics (Nordita).You can read more about us here: Department of Physics.

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Project description

The Trapped Ion Quantum Technology group at Stockholm University is inviting applications for a postdoctoral position in our Trapped Rydberg Ion Project. The candidate will contribute to cutting-edge research on trapped ion experiments, focusing on the implementation of fast quantum gates and quantum algorithms using Rydberg interactions.

Trapped Rydberg ions represent a novel platform for quantum computation. By applying laser pulses, the outermost electron of an ion is excited to a high-lying Rydberg orbital [1], resulting in ions that are millions of times larger than their ground-state counterparts. This dramatic increase in size grants Rydberg ions unique and highly favorable properties for quantum operations. Specifically, trapped ions can achieve entanglement via strong Rydberg interactions in under a microsecond [2], facilitating fast entangling gates in large ion crystals. These capabilities pave the way for the realization of high-speed trapped ion quantum computers and quantum simulators.

The experimental postdoctoral project will be conducted in the Trapped Ion Quantum Technology group at Stockholm University and is funded by the Wallenberg Centre for Quantum Technology - WACQT. WACQT is committed to promoting career development, diversity and gender equality through networking and supporting activities. For more information see http://qtech.fysik.su.se/.

[1] G. Higgins, et al., Coherent control of a single trapped Rydberg ion, Physical Review Letters 119 (22), 220501 (2017). [2] C. Zhang, et al., Submicrosecond entangling gate between trapped ions via Rydberg interaction, Nature 580, 345 (2020).

Main responsibilities

The position involves experimental research with trapped ions, laser excitation into Rydberg states, characterization of quantum states and processes, numerical simulations of the experimental results, co-supervision of students.

Qualification requirements

Postdoctoral positions are appointed primarily for purposes of research. Applicants are expected to hold a Swedish doctoral degree or an equivalent degree from another country.

Assessment criteria

The degree must have been completed at latest before the employment decision is made, but no more than three years before the closing date. An older degree may be acceptable under special circumstances. Special reasons refer to sick leave, parental leave, elected positions in trade unions, service in the total defense, or other similar circumstances as well as clinical attachment or service/assignments relevant to the subject area.

In the appointment process, special attention will be given to skills and experience in experimental research in quantum information or quantum optics with trapped ions, or ultracold atoms, Rydberg physics, and precision laser spectroscopy.

About the employment

The position involves full-time employment for a minimum of two years and a maximum of three years, with the possibility of extension under special circumstances. Start date 2025-04-01 or as per agreement.

We offer

With us, you will experience the dynamic interaction between higher education and research that makes Stockholm University an exciting and creative environment. You will work in an international environment and get favourable conditions. The university is located in the National City Park with good transport links to the city.

Stockholm University strives to be a workplace free from discrimination and with equal opportunities for all.

Contact

Further information about the position can be obtained from Professor Markus Hennrich, phone: +46 8 5537 8614, markus.hennrich@fysik.su.se.

Application

Apply for the position at Stockholm University's recruitment system. Attach a personal letter and CV as well as the attachments requested in the application form. It is the responsibility of the applicant to ensure that the application is complete in accordance with the instructions in the job advertisement, and that it is submitted before the deadline.

The instructions for applicants are available at: How to apply for a position.