Programme: Provisional
| 1030 |
Welcome Coffee in Staff Common Room, Level 3 |
| 1100 |
Peter van Loock, Room 222, Quantum Information with Continuous Variables: What's New? |
| 1200 |
Lunch in Staff Common Room |
| 1315 |
Viv Kendon, Room 222, Quantum Simulation & Analogue Computation |
| 1415 |
Gerardo Adesso, Room 222, TBA |
| 1515 |
Coffee in Staff Common Room |
The next Quisco meeting was held at the University of St Andrews, Physics and Astronomy building, room 222.
Abstracts:
Quantum information with continuous variables: what's new?
Peter van Loock
Optical Quantum Information Theory Group, Max Plank Institute for the Science of Light and University of Erlangen-Nuernberg, Erlangen, Germany
An overview will be given over some of the more recent results on quantum computing over continuous variables, including continuous-variable models for cluster computation and their implementations, and the construction and applicability of continuous-variable quantum error correction.
Quantum simulation and analogue computation
Viv Kendon, Leeds
The quantum version of analogue computation -- usually known
as continuous variable quantum computing (CVQC) -- is relatively
unexplored compared to digital quantum computation. We know that
universal quantum computation is possible in an analogue setting
[Lloyd+Braunstein PRL 82 1784 1999], with the same caveats as classical
analogue computation where the resources scale unfavourably with
precision due to the lack of binary encoding of the data. Little else
is known about the theoretical underpinning and practical application.
Simulation of quantum systems also does not binary encode the data
[Brown et al, PRL 97 050504 2006]. In this talk I will explore the
commonalities between analogue computation and quantum simulation, and
the implications this has for the development of both.
Quantum teamwork for unconditional multiparty communication with
Gaussian states
Gerardo Adesso, Nottingham
We demonstrate the capability of continuous variable Gaussian states to
communicate multipartite quantum information. A quantum teamwork
protocol is presented according to which an arbitrary possibly entangled
multimode state can be faithfully teleported between two teams each
comprising many cooperative users. We prove that N-mode Gaussian
weighted graph states exist for arbitrary N that enable unconditional
quantum teamwork implementations for any arrangement of the teams. These
perfect continuous variable maximally multipartite entangled resources
are typical among pure Gaussian states and are unaffected by the
entanglement frustration occurring in multiqubit states. | 
