SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 49: Quantum Coherence and Quantum Information Systems I

TT 49.2: Vortrag

Donnerstag, 30. März 2023, 11:45–12:00, HSZ 304

A co-design superconducting quantum circuit for quantum simulations — •Daria Gusenkova, Jayshankar Nath, Hsiang-Sheng Ku, Julia Lamprich, Nicola Wurz, Stefan Pogorzalek, Florian Vigneau, Ping Yang, Frank Deppe, Antti Vepsäläinen, Alessandro Landra, Vladimir Milchakov, Caspar Ockeloen- Korppi, Wei Liu, Lan-Hsuan Lee, Seung-Goo Kim, Hermanni Heimonen, Manish Thapa, and Inés de Vega — IQM Germany GmbH, Nymphenburger Str. 86, 80335 Munich

The co-design concept of building application-specific quantum processors is a viable strategy for reaching quantum advantage with noisy intermediate-scale quantum computers. We consider many-body problems which map onto a Hamiltonian with all-to-all interacting qubits. Here, a prototypical example is the simulation of a nanoscale NMR system consisting of an NV center coupled to multiple nuclear spins. We discuss the implementation on a star-topology circuit developed in IQM. Compared to the general-purpose square-grid topology, the star reduces the number of SWAP gates in the algorithm implementation, and thus tolerates higher gate errors for a given computational precision [1]. In order to allow for hardware scaling, we use a distributed-element resonator as a center component in the circuit. To use this resonator as a computational element, we develop qubit-resonator SWAP and CZ gates. In this talk, we present the experimental progress towards digitally simulating the nanoscale NMR problem.

[1] M. G. Algaba et. al., Phys. Rev. Research 4, 043089 (2022)