Related papers: Observation of the acoustic Purcell effect with a color-center and a nanomechanical resonator

Observation of the acoustic Purcell effect with a color-center and a nanomechanical resonator

URL: http://arxiv.org/abs/2503.09946v2
Date: Fri, 21 Mar 2025 12:20:09 GMT
Title: Observation of the acoustic Purcell effect with a color-center and a nanomechanical resonator
Authors: Graham Joe, Michael Haas, Kazuhiro Kuruma, Chang Jin, Dongyeon Daniel Kang, Sophie Ding, Cleaven Chia, Hana Warner, Benjamin Pingault, Bartholomeus Machielse, Srujan Meesala, Marko Loncar,
Abstract summary: We build a nanomechanical resonator around a color-center spin qubit in diamond.<n>We observe ten-fold faster spin relaxation when the spin qubit is tuned into resonance with a 12 GHz acoustic mode.<n>Our work establishes a new regime of control for quantum defects in solids.
Score: 0.5976529711964845
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The radiative properties of atoms are inherently linked to their surrounding environment. Placing an electromagnetic resonator around atoms can enhance spontaneous emission, as shown by Purcell in the 1940s. This approach is now routinely used in quantum computing and communication to channel photons emitted by atoms into well-defined modes and control atom-photon interactions. For solid-state artificial atoms, such as color-centers, the host lattice introduces an acoustic environment, allowing excited atoms to relax by emitting phonons. Here we observe the acoustic Purcell effect by constructing a specially engineered, microwave-frequency nanomechanical resonator around a color-center spin qubit in diamond. Using a co-localized optical mode of the structure that strongly couples to the color-center's excited state, we perform single-photon-level laser spectroscopy at milliKelvin temperatures and observe ten-fold faster spin relaxation when the spin qubit is tuned into resonance with a 12 GHz acoustic mode. Additionally, we use the color-center as an atomic-scale probe to measure the broadband phonon spectrum of the nanostructure up to a frequency of 28 GHz. Our work establishes a new regime of control for quantum defects in solids and paves the way for interconnects between atomic-scale quantum memories and qubits encoded in acoustic and superconducting devices.

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