BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Using local additivity to find examples of superadditivity of quan
 tum channels - Beth Ruskai (University of Massachusetts Lowell)
DTSTART:20180726T154500Z
DTEND:20180726T163000Z
UID:TALK108406@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:The local additivity of minimal output entropy can be extended
  to local additivity of maximal relative entropy with respect to a fixed r
 eference state. This can be exploited to test channels for superadditivity
  of Holevo capacity with numerical effort comparable to searching for the 
 minimal output entropy. Local maxima which do not arise from product input
 s play a key role.&nbsp\; Moreover\, evidence of superadditivity can be fo
 und even if the additivity violation itself is too small to be seen numeri
 cally.&nbsp\; A&nbsp\; max-min expression for the capacity\, dues to Petz\
 , et al\, plays a key role.  <br><br><br><br>
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR