Benjamin Béri

Prof Benjamin Béri

Professor of Theoretical Physics

Office: 540a Mott Bld
Phone: +44(0)1223 3 37258
Email: bfb26 @ cam.ac.uk

TCM Group, Cavendish Laboratory
19 JJ Thomson Avenue,
Cambridge, CB3 0HE UK.

Research Group

Research

I am interested in novel forms of matter emerging from the collective quantum mechanical behaviour of many particles. In my research, these particles may be electrons in certain solid-state materials and devices or a collection of atoms at "ultracold" temperatures.

Most of my current research is on so-called topological phases: in these systems particles develop a strange kind of order that has no local order parameter (like magnetisation is for ferromagnets), but which appears through nonlocal "topological invariants" (abstract analogues of the integer counting the twists of the locally featureless strip on the right). This strange order has a number of striking consequences, such as the emergence of conducting boundaries immune to backscattering by impurities, or exotic particles that underlie novel schemes for quantum information processing.

Möbius strip photo by David Benbennick - CC:BY-SA.

Featured Publications

SymTFT out of equilibrium: from time crystals to braided drives and Floquet codes
V. Motamarri, C. K. McLauchlan, and B. Béri, arXiv:2312.17176
Dynamical magic transitions in monitored Clifford+T circuits
M. A. Bejan, C. K. McLauchlan, and B. Béri, arXiv:2312.00132
Surface codes, quantum circuits, and entanglement phases
J. Behrends, F. Venn, and B. Béri, arXiv:2212.08084
Coherent error threshold for surface codes from Majorana delocalization
F. Venn, J. Behrends, and B. Béri, Phys. Rev. Lett. 131, 060603 (2023).
Fermion-Parity-Based Computation and its Majorana-Zero-Mode Implementation
C. K. McLauchlan and B. Béri, Phys. Rev. Lett. 128, 180504 (2022).
Sachdev-Ye-Kitaev circuits for braiding and charging Majorana zero modes
J. Behrends and B. Béri, Phys. Rev. Lett. 128, 106805 (2022).
Strong zero modes from geometric chirality in quasi-one-dimensional Mott insulators
Raul A. Santos and B. Béri, Phys. Rev. Lett. 125, 207201 (2020).
Local integrals of motion for topologically ordered many-body localized systems
T. B. Wahl and B. Béri, Phys. Rev. Research 2, 033099 (2020).
Supersymmetry in the Standard Sachdev-Ye-Kitaev model
J. Behrends and B. Béri, Phys. Rev. Lett. 124, 236804 (2020).
Exact nonequilibrium transport in the topological Kondo effect
B. Béri, Phys. Rev. Lett. 119, 027701 (2017).
Majorana-Klein hybridization in topological superconductor junctions
B. Béri, Phys. Rev. Lett. 110, 216803 (2013).
Topological Kondo effect with Majorana fermions
B. Béri and N. R. Cooper, Phys. Rev. Lett. 109, 156803 (2012).
Z₂ topological insulators in ultracold atomic gases
B. Béri and N. R. Cooper, Phys. Rev. Lett. 107, 145301 (2011).
Local tensor network for strongly correlated projective states
B. Béri and N. R. Cooper, Phys. Rev. Lett. 106, 156401 (2011).
Domain wall in a chiral p-wave superconductor: a pathway for electrical current
I. Serban, B. Béri, A. R. Akhmerov, and C. W. J. Beenakker, Phys. Rev. Lett. 104, 147001 (2010) [Editors' Suggestion].
Topologically stable gapless phases of time-reversal-invariant superconductors
B. Béri, Phys. Rev. B 81, 134515 (2010).