A QIG seminar on “the Polynomial Hierarchy” by Friederike Dziemba

In this post I’d like to share a video we’ve uploaded of a recent talk in the quantum information group seminar series by Friederike Dziemba where she presents a physicist-friendly overview of the polynomial hierarchy, a central idea in computational complexity theory:

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A QIG seminar on “Approximating Polynomial Optimizations” by David Reeb

The quantum information group, Hannover, organises a regular group seminar where members have the opportunity to speak on a variety of themes from communicating early new results, to general interest topics such as reviews of interesting new papers.

In this post I’d like to highlght a video we’ve uploaded of a recent talk by David Reeb on “Approximating Polynomial Optimizations” via semidefinite programs:

If you’d like to see more content like this then please do hit the like button. And if you’d like to keep up to date with content from the quantum information group, Hannover, then please don’t hesitate to subscribe to our channel and my own channel.

Advanced quantum theory

This summer semester (2016) I am giving a course on advanced quantum theory. This course is intended for theorists with familiarity with basic textbook single-particle quantum mechanics. The main objective is to understand how to study many interacting particles within QM. We will cover second quantisation, scattering theory, and some elementary relativistic quantum mechanics.

The course is now well under way and there are already several lectures available on youtube in the following playlist. I’ll be posting the rest there as the course develops.

 

The theory of quantum noise and decoherence, lecture 13

The video of my 13th lecture on the theory of quantum noise and decoherence is now available.
Here in lecture 13 I complete the derivation of Lindblad form for completely positive semigroups and discuss quantum jumps:

The theory of quantum noise and decoherence, lecture 12

The video of my 12th lecture on the theory of quantum noise and decoherence is now available.
Here in lecture 12 I begin the derivation of Lindblad form for completely positive semigroups:

The theory of quantum noise and decoherence, lecture 11

The video of my 11th lecture on the theory of quantum noise and decoherence is now available.
Here in lecture 11 I continue the discussion of a model for the continuous measurement of position:

The theory of quantum noise and decoherence, lecture 10

The video of my 10th lecture on the theory of quantum noise and decoherence is now available.
Here in lecture 10 I continue the discussion of master equations for quantum dots and introduce a model for the continuous measurement of position:

The theory of quantum noise and decoherence, lecture 9

The video of my 9th lecture on the theory of quantum noise and decoherence is now available.
Here in lecture 9 I discuss quasi-free fermion systems and begin the discussion of master equations for quantum dots:

The theory of quantum noise and decoherence, lecture 8

The video of my 8th lecture on the theory of quantum noise and decoherence is now available.
Here in lecture 8 I derive and solve the master equation for radiative damping and cavity decay:

The theory of quantum noise and decoherence, lecture 7

The video of my 7th lecture on the theory of quantum noise and decoherence is now available.
Here in lecture 7 I show how to derive the master equation for open quantum systems: