I'm a postdoctoral researcher in theoretical condensed matter physics.
I study topological phases of matter and dissipative phases of quantum matter.
In layman's terms: I help mapping out the landscape of physical materials that are possible in principle,
but have not been created in the laboratory yet. If I can say
"I have a theoretical proposal for a material that is unlike anything we've seen before,
but it should still be possible to build this", then I did something right.
My focus is on materials where the weird rules of quantum physics play a prominent role.
Who knows, maybe one of these materials will power the handheld device of the future.
 In Group:
 Prof. Dr. Yuval Gefen at the Weizmann Institute of Science.
 Email:
 heinrichgregor dot zirnstein at weizmann dot ac.il
 Address:
 Weizmann Institute of Science
Rehovot 7610001
Israel
Notes
Here, I collect various introductory notes, publications and talk transcripts. I hope they are useful.
Expository material
Physics
 "Exponentially growing bulk Green functions as signature of nontrivial nonHermitian winding number in one dimension,"
H.G. Z. and Bernd Rosenow.
Article, arxiv:2007.07026.
 "Voigt Exceptional Points in an Anisotropic ZnOBased Planar Microcavity: SquareRoot Topology, Polarization Vortices, and Circularity,"
Steffen Richter, H.G. Z., Jesús ZúñigaPérez, Evgeny Krüger, Christiane Deparis, Lukas Trefflich, Chris Sturm, Bernd Rosenow, Marius Grundmann, and Rüdiger SchmidtGrund.
Article, Phys. Rev. Lett. 123, 227401 (2019).
 "Bulkboundary correspondence for nonHermitian Hamiltonians via Green functions,"
H.G. Z., Gil Refael and Bernd Rosenow. Article, arxiv:1901.11241.
 "Evolution of the transmission phase through a Coulombblockaded Majorana wire,"
Casper Drukier, H.G. Z., Bernd Rosenow, Ady Stern and Yuval Oreg.
Article, Phys. Rev. B 98, 161401(R) (2018), arxiv:1806.01399.
 "Topological Magnetoelectric Effect: Nonlinear TimeReversalSymmetric Response, Witten Effect, and HalfInteger Quantum Hall Effect,"
H.G. Z. and Bernd Rosenow.
Feature Article,
Phys. Status Solidi B 257, 1900698 (2020),
arxiv:2004.12840.

"Timereversalsymmetric topological magnetoelectric effect in threedimensional topological insulators,"
H.G. Z. and Bernd Rosenow.
Article,
Phys. Rev. B 96, 201112(R) (2017),
arxiv:1705.02217.
 "Phase Transitions in Holographic Superconductors of Type II."
Talk for the seminar "Holographic Methods in Condensed Matter Physics", January 2015. [pdf]

"Cancellation of quantum anomalies and bosonization of threedimensional timereversal symmetric topological insulators,"
H.G. Z. and Bernd Rosenow.
Article,
Phys. Rev. B 88, 085105 (2013),
arxiv:1303.2644.
Mathematics