Abstract
We analyze a region of fidelities for qubit which is obtained after an application of a 1→N universal quantum cloner. We express the allowed region for fidelities in terms of overlaps of pure states with irreps of Sn (n=N+1) showing that the pure states can be taken with real coefficients only. Subsequently, the case n=4, corresponding to a 1→3 cloner is studied in more details as an illustrative example. To obtain the main result, we make a convex hull of possible ranges of fidelities related to a given irrep. The formalism allows to construct the state giving rise to a given N-tuple of fidelities.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
