[Qp-l] [QCSBP] Seminar today at 16:30 CET: Bálint Tóth

[Gilyén András]

Hi,

Today Bálint Tóth will give the second concluding part of his lecture on "A
Bird's-Eye View on the Quantum Heisenberg Model". You can find the abstract
of the talk at the bottom of this email.

You can join using the following Zoom link:
https://berkeley.zoom.us/j/96826613566?pwd=MUZtOGllSklFM2d0NGhwaFBqNXhjdz09
(due to the default privacy settings *you need to sign into your Zoom
account before clicking on the above link*).

After the seminar we will have room for informal discussions as well on
gather.town:  https://gather.town/i/Cj5bz5oe (to avoid unwanted echoes it
is recommended to use Google Chrome or the dedicated gather.town app)

Best,

András

2021.05.06. 16:30 CET -- *Speaker: Bálint Tóth* (University of Bristol and
Rényi Institute)

*Title:* A Bird's-Eye View on the Quantum Heisenberg Model (Part II)

*Abstract:* The quantum Heisenberg model is the emblematic model of quantum
statistical physics. Despite its relative simplicity (at the level of
definition) it exhibits most interesting physical phenomena, like emergence
of so-called *off diagonal long range order* at low temperatures, in
dimension 3 or more. This phase transition is closely related to the
notorious Bose-Einstein condensation. From a mathematical point of view,
these phenomena are only partly established with full rigour. There are
plenty of challenges left for next generations of mathematicians and
mathematical physicists. I will define the model, state the problems,
present some of the existing main mathematical results, open problems and
conjectures.

Warning: All results and conjectures presented are about 30 years old, or
older. These seem to be truly hard problems.

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