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Austrian Academy of Sciences Institute for Quantum Optics and Quantum Information
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News More News

Arfor Houwman

Arfor Houwman danced the best

Arfor Houwman from Francesca Ferlaino's team turned his research topic into a music video and won... Read Full Article
Photo: Dominik Pfeifer

Novel quantum architecture

Innsbruck physicists have presented a new architecture for improved quantum control of microwave... Read Full Article
Photo: Dominik Pfeifer

Hot Schrödinger cat states created

Quantum states can only be prepared and observed under highly controlled conditions. A research... Read Full Article
Illustration: Oliver Diekmann/TU Wien

Quantum simulators: When nature reveals its natural laws

Quantum simulators are a completely new tool for research: quantum physics is studied by other... Read Full Article

In the News

physicsworld: Schrödinger cat states like it hot

Superpositions persist at temperatures up to 1.8 K – practically oven-like by quantum standards

Nature: H. Jeffrey Kimble (1949–2024)

Champion experimentalist of quantum optics and squeezed-light pioneer has sadly passed away.

Research Groups

Dipolar Quantum Gases

Foto of Francesca Ferlaino
The research team led by Francesca Ferlaino focuses on the study of dipolar quantum phenomena, using strongly magnetic atomic species. In 2012, the group has created the first Bose-Einstein... Read more …

Ultracold Atoms and Quantum Gases

Foto of Rudolf Grimm
The research group led by R. GRIMM investigates ultracold particle systems consisting of optically trapped quantum gases at temperatures close to absolute zero. Because of their superb experimental... Read more …

Superconducting quantum circuits

Foto of Gerhard Kirchmair
Gerhard Kirchmair’s research group works on superconducting circuits and their application for quantum computation and simulation. Superconducting Josephson junctions are used to realize the quantum... Read more …

Many-Body Quantum Optics

Foto of Hannes Pichler
The research group led by Hannes Pichler studies quantum optical systems, quantum many-body physics and quantum information. The group aims at laying the theoretical foundations for next generation... Read more …

Emeritus Research Groups

Quantum Optics and Spectroscopy

Foto of Rainer Blatt
The research group led by Rainer Blatt investigates quantum processes in a system of few ions held in ion traps. The experiments aim at achieving complete control over all quantum degrees of freedom in... Read more …

Quantum Optics

Foto of Peter Zoller
Wittgenstein awardee Peter Zoller studies topics in the fields of theoretical quantum optics and atomic physics as well as quantum information and condensed matter theory. His main focus is on... Read more …

Most Recent Preprints

Fabrication and characterization of vacuum-gap microstrip resonators C. Schlager, R. Albert, G. Kirchmair arXiv:2503.07431
Measuring full counting statistics in a quantum simulator L. K. Joshi, F. Ares, M. K. Joshi, C. F. Roos, P. Calabrese arXiv:2501.14424 Show Abstract
In quantum mechanics, the probability distribution function (PDF) and full counting statistics (FCS) play a fundamental role in characterizing the fluctuations of quantum observables, as they encode the complete information about these fluctuations. In this letter, we measure these two quantities in a trapped-ion quantum simulator for the transverse and longitudinal magnetization within a subsystem. We utilize the toolbox of classical shadows to postprocess the measurements performed in random bases. The measurement scheme efficiently allows access to the FCS and PDF of all possible operators on desired choices of subsystems of an extended quantum system.
Fast and Error-Correctable Quantum RAM F. Cesa, H. Bernien, H. Pichler arXiv:2503.19172v1 Show Abstract
Quantum devices can process data in a fundamentally different way than classical computers. To leverage this potential, many algorithms require the aid of a quantum Random Access Memory (QRAM), i.e. a module capable of efficiently loading datasets (both classical and quantum) onto the quantum processor. However, a realization of this fundamental building block is still outstanding, since existing proposals require prohibitively many resources for reliable implementations, or are not compatible with current architectures. Moreover, present approaches cannot be scaled-up, as they do not allow for efficient quantum error-correction. Here we develop a QRAM design, that enables fast and robust QRAM calls, naturally allows for fault-tolerant and error-corrected operation, and can be integrated on present hardware. Our proposal employs a special quantum resource state that is consumed during the QRAM call: we discuss how it can be assembled and processed efficiently in a dedicated module, and give detailed blueprints for modern neutral-atom processors. Our work places a long missing, fundamental component of quantum computers within reach of currently available technology; this opens the door to algorithms featuring practical quantum advantage, including search or oracular problems, quantum chemistry and machine learning.
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Institute for Quantum Optics and
Quantum Information - Innsbruck
of the Austrian Academy of Sciences

Technikerstraße 21a
6020 Innsbruck, Austria


Phone +43 512 507 47100
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