BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Henry Wolkowicz (University of Waterloo) DTSTART:20210405T133000Z DTEND:20210405T143000Z DTSTAMP:20260423T035055Z UID:OWOS/42 DESCRIPTION:Title: Ro bust Interior Point Methods for Quantum Key Rate Computation for Quantum K ey Distribution\nby Henry Wolkowicz (University of Waterloo) as part o f One World Optimization seminar\n\n\nAbstract\nWe use facial reduction on the nonlinear objective function and derive a stable reformulation of the quantum key rate for finite dimensional quantum key distribution (QKD) pr oblems. This avoids the difficulties for current algorithms from singulari ties that arise due to loss of positive definiteness for the distributions . This allows for the derivation of an efficient Gauss-Newton interior poi nt approach. We provide provable lower and upper bounds for the hard nonli near semidefinite programming problem.\n\nEmpirical evidence illustrates t he strength of this approach as we obtain high accuracy solutions and theo retically guaranteed upper and lower bounds for QKD. We compare with other current approaches in the literature.\n\nJoint work with: Hao Hu\, Jiyoun g Im\, Jie Lin\, Norbert Lutkenhaus.\n\nThe address and password of the zo om room of the seminar are sent by e-mail on the mailinglist of the semina r one day before each talk\n LOCATION:https://researchseminars.org/talk/OWOS/42/ END:VEVENT END:VCALENDAR