Past Events

2025

Kadanoff Seminar: Geometry of Insulators and Topology of Metals --- An Entangled View from the Corner. - Pok Man Tam, Princeton University

1:30 pm MCP 201

Geometry of Insulators and Topology of Metals—- An Entangled View from the Corner.

May 19

Particle Theory Seminar: Understanding Gravitational Tides with Scattering Amplitudes. - Mikhail Ivanov, MIT

1:30 pm MCP 201

Understanding Gravitational Tides with Scattering Amplitudes.

May 14

Special Kadanoff Seminar: Decohered but entangled: how symmetries and anomalies constrain mixed states. - Leonardo Lessa, Perimeter Institute

12:30 pm MCP - 3rd Floor Atrium

Decohered but entangled: how symmetries and anomalies constrain mixed states.

May 8

Particle Theory Seminar: Broadening direct searches for light dark matter. - Ben Lehmann, MIT

1:30 pm MCP 201

Broadening direct searches for light dark matter.

May 7

Special Kadanoff Seminar: New models for Rydberg tweezer arrays: from doped quantum magnets to lattice gauge theories. - Lukas Homeier, University of Colorado - Boulder

12:30 pm MCP 3rd Floor Atrium

New models for Rydberg tweezer arrays: from doped quantum magnets to lattice gauge theories.

May 6

Kadanoff Seminar: Quantum circuit and novel quantum state preparation from spacetime duality. - Yizhi You, Northeasten

1:30 pm MCP 201

Quantum circuit and novel quantum state preparation from spacetime duality.

May 5
Apr 30

Particle Theory Seminar: Building up quantum spacetimes with BCFT tensor networks and symmetric quantum RG. - Yikun Jiang, Northeastern University

1:30 pm MCP 201

Building up quantum spacetimes with BCFT tensor networks and symmetric quantum RG.

Tensor network toy models have been invaluable in illustrating various aspects of the AdS/CFT correspondence. But can we construct more realistic tensor networks directly from a CFT and observe the emergence of a higher-dimensional bulk? In this talk, I will present a new step-by-step framework within CFT2 that constructs an exact CFT2 and at the same time AdS3 spacetime tensor network, using “BCFT Legos.” I will illustrate this procedure with explicit examples that exhibit an emergent 3D quantum gravity dual and demonstrate how geometry naturally arises from the BCFT OPE algebra. A key ingredient in this construction is the recent development of generalized global symmetries, which enables a built-in, symmetry-preserving real-space RG flow. This naturally transforms the holographic tensor network into an exact MERA-like structure. Additionally, I will discuss the implications for the factorization puzzle and show how this approach recovers key features of earlier tensor network toy models—those describing wavefunctions on fixed time slices and connected to derivations of the Ryu-Takayanagi formula.

Apr 23