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QI: Fachverband Quanteninformation
QI 18: Poster II
QI 18.38: Poster
Mittwoch, 20. März 2024, 11:00–14:30, Poster A
Controlled coupling between bulk acoustic wave resonator modes and spin states in silicon-vacancy centers — •Stefan Pfleging1,2, Arianne Brooks1,2, and Yiwen Chu1,2 — 1Department of Physics, ETH Zürich — 2Quantum Center, ETH Zürich
Hybrid quantum devices making use of a high-overtone bulk acoustic wave resonator (HBAR) are useful for storing and manipulating quantum information. By interfacing HBARs with superconducting circuits, quantum states of motion have been successfully created and manipulated [1, 2]. To enhance the coherence properties of hybrid quantum devices and thus their applicability as a quantum memory, we propose coupling HBARs coherently to the spin states of a negatively charged silicon vacancy color center (SiV−) in diamond, which exhibits coherence times in the order of 10 ms at cryogenic temperatures [3]. We aim to show that the spin qubit, which can be realized within the level scheme of the SiV− in presence of a magnetic field, can be manipulated by acoustic modes of the HBAR. In order to demonstrate the use of the SiV− coupled to the HBAR as a quantum memory, the initial goal is to couple a classically driven acoustic mode to the spin of the SiV−. As a longer-term goal, we can further incorporate a superconducting qubit coupled to the acoustic resonator, forming a coherent interface between microwave circuits and spin qubits.
[1] Y. Chu, et al., Nature 563, 666-670 (2018)
[2] M. Bild, M. Fadel, Y. Yang, et al., Science 380, 274-278 (2023)
[3] S. Meesala, et al., Phys. Rev. B 97, 205444 (2018)
Keywords: Color center; Acoustic resonator; Quantum memory