Upcoming seminars

Polar Codes for Quantum Channel Discrimination

Seminar date and time: 
2020-12-17 16:00
Author: 
Stefano Mancini
Affiliation: 
Università di Camerino

Statistical discrimination of quantum channels is a crucial part of many protocols in quantum
communication and quantum cryptography. Several paths to improve channel discrimination
exist in the literature. However, there is much to be done in the avenue of optimizing channel
discrimination using classical codes. At least two open questions can be pointed out:
how to construct low complexity encoding schemes that are interesting for channel discrimination and,
more importantly, how to develop capacity-achieving protocols.

Location: 
https://us02web.zoom.us/j/88427826091?pwd=OEFqUkxZOXpjMmJNV3Rqb2Y1aExWQT09
Contact: 

Shadow Tomography of Quantum States: Progress and Prospects

Seminar date and time: 
2020-12-03 16:30
Author: 
Scott Aaronson
Affiliation: 
University of Texas at Austin

Given an unknown quantum state rho, and a known list of two-outcome measurements E_1,...,E_M, "shadow tomography" is the task of estimating the probability that each E_i accepts rho, by carefully measuring only a few copies of rho. In 2018, I gave the first nontrivial protocol for this task.

Location: 
https://us02web.zoom.us/j/89605659387?pwd=Rm42SHR2YnJCYWdEWjRHd09hZjB2Zz09
Contact: 

GIQ Series: Optomechanics 4

Seminar date and time: 
2020-12-01 15:30
Author: 
Bartosz Markowicz
Affiliation: 
University of Warsaw

This is the final lecture of the four lecture series on optomechanics, theory and applications which will take place virtually on

Lecture 4:  Tuesday 1/12/2020   15:30-16:30

This final lecture will cover 

Estimation of cavity parameters.

 

 

Location: 
GIQ VIRTUAL SEMINAR
Contact: 
bartosz.markowicz97@gmail.com

Theory-independent dynamics and phase-space observables

Seminar date and time: 
2020-11-26 16:30
Author: 
Matthias Kleinmann
Affiliation: 
University of Siegen

By now, the device-independent approach to quantum physics
has been a fruitful tool to better understand quantum theory and find
new applications of quantum technology. In the device-independent
approach, states and measurements are black boxes, without specific
physical properties and this device-independence has then influenced
the development of the so-called generalized probabilistic theories.
However, with this inheritance, in those theories it is difficult to
approach questions regarding physics. For example: How does a system

Location: 
GIQ VIRTUAL SEMINAR
Contact: 
matthias.kleinmann@uni-siegen.de

GIQ Series: Optomechanics 3

Seminar date and time: 
2020-11-24 15:30
Author: 
Bartosz Markowicz
Affiliation: 
University of Warsaw

This is the third out of 4 lectures on Optomechanics, thory and applications, which will take place virtually on 

Lecture 3:  Tuesday 24/11 15:30-16:30

The third lecture will cover the following

Leakage from Cavity

Estimation of Cavity Parameters.

Location: 
GIQ VIRTUAL SEMINAR
Contact: 
bartosz.markowicz97@gmail.com

Bayesian parameter estimation using Gaussian states and measurements

Seminar date and time: 
2020-11-19 16:15
Author: 
Simon Morelli
Affiliation: 
IQOQI Vienna

Bayesian analysis is a framework for parameter estimation that applies even in uncertainty regimes where the commonly used local (frequentist) analysis based on the Cramer-Rao bound is not well defined. In particular, it also  applies when no initial information about the parameter value is available, e.g., when few measurements are performed.

Location: 
GIQ VIRTUAL SEMINAR
Contact: 
simon.morelli@hotmail.com

GIQ Series: Optomechanics 2

Seminar date and time: 
2020-11-18 12:00
Author: 
Bartosz Markowicz
Affiliation: 
University of Warsaw

This is the second of 4 lectures on Optomechanics, theory and applications which will take place virtually on 

Lecture 2:  Wednesday 18/11     12:00-13:00

The second lecture will cover the following 

Description of energy dissipation in cavity and mechanical oscillator,

Analysis of open system dynamics 

Linearization of equations of motion

Optomechanical bistability
 

Location: 
GIQ VIRTUAL SEMINAR
Contact: 
bartosz.markowicz97@gmail.com

Quantum Contextuality: A Historical Perspective

Seminar date and time: 
2020-11-12 16:30
Author: 
Adan Cabello
Affiliation: 
Universidad de Sevilla

I will summarize the history of quantum contextuality starting with the discussion, in the late 1920’s, of whether quantum mechanics can be complemented by “hidden variables”, which eventually led to Bell’s and Kochen-Specker’s theorems, and ending with some recent developments such as the discovery that quantum theory is the most contextual theory for ideal measurements.

 

Location: 
GIQ VIRTUAL SEMINAR
Contact: 
adan@us.es

GIQ Series: Optomechanics 1

Seminar date and time: 
2020-11-10 15:30
Author: 
Bartosz Markowicz
Affiliation: 
University of Warsaw

This the first of 4 lectures on Optomechanics, theory and applications which will take place virtually on Lecture 1:  

Tuesday 10/11     15:30-16:30

The first lecture will cover the following 

History of optomechanics

Derivation of hamiltonian Cavity optomechanics

Analysys of unitary evolution of Cavity

Adding interactions with envoierment (Driving).

Location: 
GIQ VIRTUAL SEMINAR
Contact: 
bartosz.markowicz97@gmail.com

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