P10 - Quantum Simulations with Trapped Ions

Christian Roos


Trapped atomic ions are a powerful system to develop quantum simulators capable of tackling open questions in science and technology. Key strengths of trapped-ion quantum spin simulators, in particular, are the ability to engineer a broad range of interactions and to allow precise control and readout of each individual spin. Very recent results demonstrating full control over 20-spin trapped-ion simulators, and signatures of quantum dynamics in 50-spin systems with limited control show that this research line is on the verge of controlled-access to quantum dynamics beyond the reach of conventional computers and therefore break new scientific ground. The long-term goals and visions of our project are (i) to scale up the systems to more than 50 fully addressable qubits, (ii) to develop methods for the characterization and verification of these systems, (iii) to demonstrate quantum operations beyond classical capabilities, and (iv) to answer open research questions concerning quantum many-body systems.

PI Christian Roos on
Quantum Simulations with Trapped Ions


Subproject Leader: Christian Roos

PostDoc: Manoj Joshi

PhDs: Tiffany Brydges, Florian Kranzl, Christine Maier

Admin: Claudia Mevencamp


Observing emergent hydrodynamics in a long-range quantum magnet
M. K. Joshi, F. Kranzl, A. Schuckert, I. Lovas, C. Maier, R. Blatt, K. Knap, C. F. Roos
Science 376, 720-724 (2022)

Controlling long ion strings for quantum simulation and precision measurements
F. Kranzl, M.K. Joshi, C. Maier, T. Brydges, J. Franke, R. Blatt, C. F. Roos
Phys. Rev. A 105, 052426 (2022)

Correlation spectroscopy with multi-qubit-enhanced phase estimation
H. Hainzer, D. Kiesenhofer, T. Ollikainen, M. Bock, F. Kranzl, M. K. Joshi, G. Yoeli, R. Blatt, T. Gefen, C. F. Roos
preprint arXiv.2203.12656(2022)

Experimental observation of thermalisation with noncommuting charges
F. Kranzl, A. Lasek, M. K. Joshi, A. Kalev, R. Blatt, C. F. Roos, N. Yunger Halpern
preprint arXiv.2202.04652 (2022)

Quantum Information Scrambling in a Trapped-Ion Quantum Simulator with Tunable Range Interactions
M. K. Joshi, A. Elben, B. Vermersch, T. Brydges, C. Maier, P. Zoller, R. Blatt, C. F. Roos
Phys. Rev. Lett. 124, 240505 (2020)

Cross-Platform Verification of Intermediate Scale Quantum Devices
A. Elben, B. Vermersch, R. van Bijnen, C. Kokail, T. Brydges, C. Maier, M. K. Joshi, R. Blatt, C. F. Roos, P. Zoller
Physical Review Letters, 124, 010504 (2020)

Polarization-gradient cooling of 1D and 2D ion Coulomb crystals
M. K. Joshi, A. Fabre, C. Maier, T. Brydges, D. Kiesenhofer, H. Hainzer, R. Blatt, C. F. Roos
New J. Phys. 22 103013 (2020)
preprint [arXiv:2006.15104]



Open Positions:

1. PostDoc-Position:
- for further information please write to christian.roos@uibk.ac.at

2. PhD-Position:
- for further information please write to christian.roos@uibk.ac.at