A tunable nanobeam cavity resonator, quantum register, quantum network quantum computer, use, method of adjusting the resonance frequency of a first optical cavity, and method of manufacturing a tunable nanobeam cavity

EP4762386A1Pending Publication Date: 2026-06-24UNIVERSITY OF HEIDELBERG
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
UNIVERSITY OF HEIDELBERG
Filing Date
2024-08-13
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

Existing methods for tuning the resonance frequency of optical cavities in quantum computing are cumbersome and prone to side effects such as temperature increases and phononic noise, especially when using frozen gases and microheaters.

Method used

A tunable nanobeam cavity resonator is designed with a first and second optical cavity optically coupled, where an electrically conductive portion is mechanically connected to the second optical cavity, allowing for electromechanical deformation and adjustment of the gap between the cavities to shift the resonance frequency.

Benefits of technology

This approach enables precise and effective tuning of the resonance frequency without contaminating the cryogenic environment, allowing for easy calibration and on-demand frequency shifts without introducing noise or altering the optical properties of adjacent waveguides.

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Abstract

The invention relates to a tunable nanobeam cavity resonator (100) comprising a first optical cavity (102) a second optical cavity (104) optically coupled to the first optical cavity (102) an electrically conductive portion (106) and an electrode (108), wherein the first optical cavity (102) and / or the second optical cavity (104) comprise / comprises a quantum emitter configured to host a qubit. The first optical cavity (102) and the second optical cavity (104) are provided in the tunable nanobeam cavity resonator (100) such that there is a gap (110) between the first optical cavity (102) and the second optical cavity (104). The electrically conductive portion (106) is configured to move with respect to the electrode (108) and the first optical cavity (102) when a voltage between the electrically conductive portion (106) and the electrode (108) is applied; and the electrically conductive portion (106) is mechanically connected to the second optical cavity (104) such that movement of the electrically conductive portion (106) causes movement of the second optical cavity (104) with respect to the first optical cavity (102) to adjust the gap (110) between the first optical cavity (102) and the second optical cavity (104).
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