I am a researcher in quantum information theory based at the Institut für Theoretische Physik, Leibniz Universität Hannover. I am interested in quantum information theory and complex quantum systems.

Inspired by the recent discussions (see, eg., Michael Nielsen’s blog postings) surrounding open science I decided to start a weblog containing my research notes. I intend to post my notes on my various research projects along with some expository material. It is my hope that this weblog can become a forum for open discussion and research. Thus I would like to invite you to comment, contribute, and collaborate! If you make any progress on the ideas or open problems discussed on this site then please let me know via the comments: I am more than happy for anything here to become a joint project, the more the merrier!


8 Responses to About

  1. William Lee says:

    Our website Science.org is a informational databases and online news publication for anything and everything related to science and technology. We recently ran a poll asking our website users regarding what online informational resources they use to keep up to date or even to simply find great information. It seems many of our users have labeled your blog as an excellent source of Space information. We have reviewed your blog and must say, we absolutely love the information you have made available to the public and would love to make your blog a part of our top science blogs. After browsing your blog, our research team has decided to award you a Top science Blogs award banner.

  2. Tobias Osborne says:

    I like your blog. I am really in to math even though I am only 14 and Maybe one day I will discover new things like you are doing. :).

  3. rukhsan says:

    Hello Sir
    i am a phd student working in condesed matter physics
    i thank you for the sharing your lecture notes on variational principles in quantum mechanics.
    they proved to be very helpful in understanding many things .
    particularly they helped to get a better understanding of DMRG.
    i would like to know whether renormalization procedure itself can be thought in terms of variational principle?
    best regards
    ps can i have your mail id!

    • tobiasosborne says:

      Dear rukhsan,

      Many thanks for your email and your interest!

      To answer your question: “i would like to know whether renormalization procedure itself can be thought in terms of variational principle?”

      I think the answer is not clear at the moment: some RG schemes are like variational principles, but, e.g., Wilson’s original momentum space RG is not obviously connected. So there is still work to do to find a connection…


  4. John says:


    Are you still working on those open science projects on GitHub?

    Thank you.

  5. tobiasosborne says:

    Dear John,

    Many thanks for your question: indeed we are still working on these projects. There will be imminent changes soon as we begin to work on a final paper for each of the projects.


  6. Reinhold Wiethoff says:

    Dear Professor,
    could it be or am i entitled to mention my impression,
    that you used the words “criteria” and “momenta” as if they would be the singular form of / instead of “criterium” and “momentum” during Advanced QM YouTube Lectures seemingly preferrring the feminine form (Femininum) over the Neutrum (deutsch) allthough they are the Mehrzahl…………….?

    Greetz RWitold

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