[quantum-info] PIQuDos seminar Wed May 27: Robin Blume-Kohout

[Gus Gutoski]

Reminder: Robin Blume-Kohout tomorrow at 4pm in the Time room.

On 15-05-22 12:18 PM, Gus Gutoski wrote:
> Please join us on Wednesday, May 27 at 4pm in the Time room for a 
> quantum information seminar by Robin Blume-Kohout.
>
> Title #1:  How distinguishable are two quantum processes?
> Title #2:  What is the error rate of a quantum gate?
>
> Abstract:  I will try to convince you that the two titles of this talk 
> are, in fact, synonymous -- that the "error rate" and 
> "distinguishability of quantum processes" are the same thing.  Whether 
> or not I succeed, I will go on to discuss (1) the various ways that 
> this has been quantified, (2) the state of the art in doing so, and 
> (3) why I'm not (and you shouldn't be!) satisfied.  Having spent 45 
> minutes just establishing what the "right" problem is, I will then 
> propose to solve it by sandwiching "distinguishability" between 
> "distillable distinguishability" and "distinguishability of 
> formation".  To demonstrate the utility of this approach, I'll prove 
> that the diamond norm is not always the right measure of 
> distinguishability (or even close to it!).  I will then do a 
> 180-degree turn and argue that for most of the cases that we care 
> about, the diamond norm is a good measure of distinguishability, and
> finally conclude with another 180-degree turn in which I argue that 
> maybe it's not.