Publication Date:
2018-05-10
Description:
Author(s): Shuo Sun, Hyochul Kim, Glenn S. Solomon, and Edo Waks The accuracy of optical qubit readout is fundamentally limited by the likelihood of a qubit flip induced by the optical excitation. Experiments here show that cavity quantum electrodynamics can break this limit and significantly enhance qubit readout. For a spin in a single InAs quantum dot plus a photonic-crystal cavity, selectively coupling an optical transition of the dot to the cavity mode yields spin-dependent cavity reflectivity, enabling spin readout via the reflected optical-field intensity. This work addresses a longstanding issue in solid-state quantum information processing, and is applicable to a variety of qubit systems that lack a good cycling transition for readout. [Phys. Rev. Applied 9, 054013] Published Wed May 09, 2018
Electronic ISSN:
2331-7019
Topics:
Physics