Open AccessThe Perfect Qubit: How Tunable Light Helps in the Quantum Quest
Publication year - 2020
Publication title -
photonicsviews
Language(s) - English
Resource type - Journals
eISSN - 2626-1308
pISSN - 2626-1294
DOI - 10.1002/phvs.202070611
Subject(s) - qubit , excited state , quantum , physics , phase qubit , photon , excitation , quantum mechanics , laser , atomic physics , optics
Physicists are still looking for the perfect quantum qubit: a two‐level quantum system that can be precisely measured and controlled, while remaining unaffected by its environment. One of the most promising candidates are defect centers in solid‐state materials, also known as colour centers, which have been found to emit a single photon per excitation event when excited by laser light of a particular frequency.