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Calendar of Physics Talks Vienna
| A Unified View of Quantum and Classical Correlations |
| Speaker: | Vlatko Vedral, University of Oxford & National University of Singapore |
| Abstract: | We ask if entanglement captures all there is to the "quantumness" of
correlations? We start by putting quantum entanglement and other measures of
quantumness, such as quantum discord and classical correlations, on an equal
footing. This allows us to carry out cross comparative studies for several
applications where correlations play a crucial role. We then analyse two tasks:
deterministic quantum computation with one qubit and quantum metrology with
mixed states. In the former, we will show that within specific limits quantum
correlations (including discord and entanglement) vanish, yet a classically hard
task is carried out with an exponential speed up. Yet, for the latter task, if the
mixedness of the probe is fixed, we find that square of N advantage is retained
independently of entanglement, but with quantum discord present. Finally we
question how entanglement and quantum discord are related and attempt to
shed light on a seemingly contradictory situation. |
| Date: | Fri, 25.02.2011 |
| Time: | 11:00 |
| Duration: | 60 min |
| Location: | Ernst‐Mach‐Hörsaal, 2nd Floor Boltzmanngasse 5, 1090 Vienna |
| Contact: | zeilinger-office@univie.ac.at |
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