InfoQ - Iñigo Egusquiza
Date : 12 October 2021 11:00
Type : Institut Quantique
Vous pouvez aussi vous joindre à nous au D4-2020 pour assister au séminaire.
You can also join us at the D4-2020 to attend the seminar.
University of the Basque Country
Invité par Alexandre Blais
The 0 − π qubit is not normal
The 0 − π circuit is a proposal for the creation of useful protected qubits. Here, drawing on the concept of anomalous symmetry, we show that there is a regime of operation in which the ground state and, in fact, all levels, are degenerate. This property, because it is anomalous, is independent of all energy parameters of the model. I will first discuss the need for quasi- degeneracy of ground state for qubits and the physical idea behind the 0 − π qubit. Next I will introduce the anomalous symmetry for particles in a ring threaded by a magnetic flux, and will extend the result to the 0 − π qubit.
This talk is based on the recent ArXiv submission https://arxiv.org/ abs/2109.11824