[quantum-info] PIQuDos this week

[Roger Colbeck]

Reminder of the talk in 30 mins...

On 05/12/11 21:56, Roger Colbeck wrote:
> Hi all,
>
> This Wednesday we have Eric Chitambar speaking at 4pm in the time room.
> His title and abstract are below.
>
> Best wishes,
>
> Roger
>
> ---
> Title: More Rounds of Measurement Increase the Abilities to Locally
> Transform Quantum States
>
> Abstract: The class of Local Operations with Classical Communication
> (LOCC) is a fundamental object in quantum communication and entanglement
> theory. However, despite its importance, LOCC still lacks a clear
> understanding from both a physics and math perspective. For instance, it
> is unknown the extent to which more rounds of measurement and
> communication can enhance the ability to perform certain tasks.
>
> In this talk, we will consider the problem of random-pair EPR
> distillation in which three qubit entanglement is converted into
> bipartite maximal entanglement with the target pair a priori
> unspecified. I will show that for certain random-pair distillations,
> there exists tight lower bounds on the number of LOCC rounds needed to
> achieve a given overall success probability. Furthermore, I will
> describe certain entanglement transformations that are possible if and
> only if the protocol uses an infinite (unbounded) number of rounds.
> Interestingly, the number of rounds required to distil bipartite
> entanglement from particular multipartite states can depend
> discontinuously on the amount of entanglement distilled.