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VERSION:2.0
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BEGIN:VEVENT
UID:6a08ce4c91628
DTSTART:20240717T123000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20240717T133000Z
LOCATION:Blue Lecture Room 
SUMMARY:ICFO | MARTIN JOHANNES RENNER
CLASS:PUBLIC
DESCRIPTION:It is a crucial feature of quantum mechanics that not all measu
 rements are compatible with each other. However\, if measurements suffer f
 rom noise they may lose their incompatibility. Here\, we consider the effe
 ct of white noise and determine the critical visibility such that all qubi
 t measurements\, i.e.\, all positive operator-valued measures (POVMs)\, be
 come compatible\, i.e.\, jointly measurable. In addition\, we apply our me
 thods to quantum steering and Bell nonlocality. We obtain a tight local hi
 dden state model for two-qubit Werner states of visibility 1/2. This deter
 mines the exact steering bound for two-qubit Werner states and also provid
 es a local hidden variable model that improves on previously known models.
  Interestingly\, this proves that POVMs are not more powerful than project
 ive measurements to demonstrate quantum steering for these states. 
DTSTAMP:20260516T200636Z
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