Multimode cavity quantum electrodynamics


Multimode cavity quantum electrodynamics—where a two-level system interacts simultaneously with many cavity modes—provides a versatile framework for quantum information processing and quantum optics. Because of the combination of long coherence times and large interaction strengths, one of the leading experimental platforms for cavity QED involves coupling a superconducting circuit to a 3D microwave cavity. In this work, we realize a 3D multimode circuit QED system with single photon lifetimes of 2 ms across 9 modes of a novel seamless cavity. We demonstrate a variety of protocols for universal single-mode quantum control applicable across all cavity modes, using only a single drive line. We achieve this by developing a straightforward flute method for creating monolithic superconducting microwave cavities that reduces loss while simultaneously allowing control of the mode spectrum and mode-qubit interaction. We highlight the flexibility and ease of implementation of this technique by using it to fabricate a variety of 3D cavity geometries, providing a template for engineering multimode quantum systems with exceptionally low dissipation. This work is an important step towards realizing hardware efficient random access quantum memories and processors, and for exploring quantum many-body physics with photons.


Multimode cavity quantum electrodynamics

Multimode cavity quantum electrodynamics

See Also

cavity resonator
Casimir cavity

Created by Dale Pond. Last Modification: Tuesday July 12, 2022 08:06:09 MDT by Dale Pond.