PIRSA:C08020 - Quantum Estimation: Theory and Practice - 2008PODCAST Subscribe to podcast

Quantum Estimation: Theory and Practice


Collection URL: http://pirsa.org/C08020

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PIRSA:08080049  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Multiple observations of quantum systems
Speaker(s): Vladimir Buzek
Abstract: Let us assume a following scenario: In a state of a quantum system one qubit is encoded. The first observer has no prior knowledge about the state of the qubit. He performs an optimal measurement on the system and based on the measured data he estimates the state on the qubit. After performing the m... read more
Date: 28/08/2008 - 11:00 am

PIRSA:08090051  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Two qubit visualisation
Speaker(s): Joe Altepeter
Abstract: After working on this for the past week, I'm pretty excited about his topic. The method allows easy visualization of single qubit rotations and separable projections, much like the Poincare sphere for one qubit states.
Date: 28/08/2008 - 11:45 am

PIRSA:08080037  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Designing Optimal States and Transformations for Quantum Optical Metrology and Communication
Speaker(s): Dmitry Uskov
Abstract: I will briefly describe our recent progress in solving some optimization problems involving metrology with multipath entangled photon states and optimization of quantum operations on such states. We found that in the problem of super-resolution phase measurement in the presence of a loss one can sin... read more
Date: 28/08/2008 - 2:30 pm

PIRSA:08080055  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Tomography on the Sphere
Abstract: a short presentation about work characterizing triphoton states via Wigner functions on the Poincaré sphere.
Date: 28/08/2008 - 3:15 pm

PIRSA:08080038  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Tomography for quantum diagnostics
Speaker(s): Zdenek Hradil
Abstract: Quantum information technologies have recorded enormous progress within the recent fifteen years. They have developed from the early stage of thought experiments into nowadays almost ready-to-use technology. In view of many possible applications the question of efficient analysis and diagnostics of ... read more
Date: 28/08/2008 - 4:00 pm

PIRSA:08080039  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Learning from experiments on coherent control
Speaker(s): David Cory
Abstract: I will discuss a few case studies of coherent control experiments and how we use quantum esstimation to motivate improved experiments. Examples from NMR with physical and logical quits, electron/nuclear spin systems and persistent current flux qubits
Date: 28/08/2008 - 4:45 pm

PIRSA:08080053  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Polarisation tomography of macro- and mesoscopic quantum states of light
Speaker(s): Maria Chekhova
Abstract: We report an experiment on reconstructing the quantum state of bright (macroscopic) polarization-squeezed light generated in a birefringent (polarization-maintaining) fibre due to the Kerr nonlinearity. The nonlinearity acts on both H and V polarization components, producing quadrature squeezing; by... read more
Date: 29/08/2008 - 9:30 am

PIRSA:08080040  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Dynamical Evolution of Superoperator for Hamiltonian Identification and Quantum Dynamical Control
Speaker(s): Masoud Mohseni
Abstract: Estimation of quantum Hamiltonian systems is a pivotal challenge to modern quantum physics and especially plays a key role in quantum control. In the last decade, several methods have been developed for complete characterization of a 'superopertor', which contains all information about a quantum dyn... read more
Date: 29/08/2008 - 10:15 am

PIRSA:08080056  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Priors for quantum states & processes
Speaker(s): Karol Zyczkowski
Abstract: As became apparent during Koenraad's talk, there are some important subleties to concepts like 'flat prior' and 'uniform distribution'... especially over probability simplices and quantum state spaces. This is a key problem for Bayesian approaches. Perhaps we're more interested in Jeffreys priors, B... read more
Date: 29/08/2008 - 11:00 am

PIRSA:08080057  ( MP4 Medium Res , MP3 , PDF ) Which Format?
News Flash: adapting compressed sensing to quantum systems
Speaker(s): Robert Kosut
Date: 29/08/2008 - 11:45 am

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