The Quantum Way of Doing Computations, Simulations and Measurements
Colloquia
- Speaker
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Rainer Blatt
Institute for Experimental Physics, University of Innsbruck, Austria - When
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2025/05/08
11:30 - Place
- Paraninfo, University of the Basque Country, Leioa, Bilbao
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In this presentation, we review the fundamental functional principles of quantum information processing and provide an update on the status of the Innsbruck trapped-ion quantum computer [1]. Using strings of trapped ions, we implement a quantum information processor to carry out quantum operations. We present an overview of the available quantum toolbox and discuss the scalability of this approach. The quantum computing methodology is exemplified through analog and digital quantum simulations [2,3]. By utilizing the quantum toolbox for entanglement-enhanced Ramsey interferometry, we determine optimal parameters for quantum metrology [4]. To protect against the impact of noise, quantum computers encode logical quantum information redundantly across multiple qubits using error-correcting codes. We highlight the implementation of a fault-tolerant universal set of gates on two logical qubits within the trapped-ion quantum computer [5]. With Alpine Quantum Technologies, a commercially available NISQ-type quantum processor has been developed and is already accessible for industrial applications.
[1] I. Pogorelov et al., PRX Quantum 2, 020343 (2021)
[2] C. Kokail et al., Nature 569, 355–360 (2019)
[3] M. K. Joshi et al., Science 376, 720 (2022)
[4] C. D. Marciniak et al., Nature 603, 604 (2022)
[5] L. Postler et al., Nature 605, 675 (2022)
About the speaker
Rainer Blatt is an experimental quantum optician, Emeritus Professor at the University of Innsbruck and director of the Institute for Quantum Optics and Quantum Information (IQOQI), where he leads the Quantum Optics and Spectroscopy group. Blatt is among the pioneers of using trapped ions manipulated by laser light for fundamental quantum optics, precision spectroscopy, and quantum information experiments. He and his group have carried out trail-blazing experiments such as the first realization to the Cirac-Zoller quantum gate, the generation and verification of record-setting massively entangled multi-qubit states and the realization of small-scale quantum algorithms and quantum simulations. Among many other honors and awards, he won an ERC Advanced Grant (2008), the Stern-Gerlach medal (2012), the John Stewart Bell Prize (2015), the Micius Prize (2019), and the Herbert Walther Prize (2023). He is member of the Austrian, US, Spanish, and German Academies of Sciences.