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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

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

Quantum Estimation: Theory and Practice

Organizer(s):

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


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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

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

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

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

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

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

News Flash: adapting compressed sensing to quantum systems
Speaker(s): Robert Kosut
Abstract:
Date: 29/08/2008 - 11:45 am

Tomography without trusted apparatus
Speaker(s): Michele Mosca
Abstract: I will talk about 'self-testing' quantum apparatus.
Date: 29/08/2008 - 2:00 pm

Identifying Stabilizer States
Speaker(s): Daniel Gottesman
Abstract: Suppose you are given m copies of an unknown n-qubit stabilizer state. How many copies do you need before you can figure out exactly what state it is? Just to specify the state requires about n^2/2 bits, so certainly m is at least n/2. Using only single-copy measurements, we show how to identify the... read more
Date: 29/08/2008 - 2:45 pm

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