Year: 2006
Type: article
Abstract: In this paper we study the properties of two-qubit gates. We review the most common parameterizations for the local equivalence classes of two-qubit gates and the connections between them. We then introduce a new discrete local invariant, namely the number of local degrees of freedom that a gate can bind. The value of this invariant is calculated analytically for all the local equivalence classes of two-qubit gates. We find that almost all two-qubit gates can bind the full six local degrees of freedom and are in this sense more effective than the controlled-NOT gate which only can bind four local degrees of freedom.
DOI: 10.26421/qic6.1-4
Authors: L. Koponen, V. Bergholm, M.M. Salomaa
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
Funder: Suomen Kulttuurirahasto
OpenAlex ID: W4244850871