Past Events

QG group meeting: Expansions of the Black Hole Solution in AdS(3)

2018-10-01
A719, Lab 3

QG Group Meeting

Title: Expansions of the Black Hole Solution in AdS(3)

Speaker: Nico Fischer, Research Intern, Quantum Gravity Unit (Neiman)

Journal club seminar: Black hole memory effect

2018-09-27
A 613, Lab 2

Discussion on Black Hole Memory Effect by Tomonori Ugajin.

Journal club seminar: Wormholes

2018-09-21
A 613, Lab 2

Discussion on Wormholes and Extra Dimensions by Vyacheslav Lysov.

QG group meeting: Fluid/gravity correspondence

2018-09-10
A719, Lab 3

This is the weekly QG group meeting.

Speaker: Vyacheslav  Lysov 

Title: Fluid/Gravity Correspondence 

Journal club seminar: Geometry of Complexity

2018-09-07
A613, Lab2

Discussion  by Vyacheslav Lysov on Geometry of Complexity.

QG group meeting: null hypersurface geometry

2018-09-03
A719, Lab 3

QG group meeting
Speaker: Yasha Neiman
Title: Introduction to the geometry of null hypersurfaces

[Seminar] "TOPOLOGICAL DEFECTS, DEFORMED LATTICES AND SPONTANEOUS SYMMETRY BREAKING" by Dr. Vincenzo Vitagliano

2018-08-28
C756, Lab 3

Speaker: Dr. Vincnezo Vitagliano from Keio University

Abstract:
External conditions have a dramatic impact on the way dynamical symmetry breaking occurs. I will review some recent (and some less recent) results of symmetry breaking in curved spacetime. Flirting with the contemporary interest toward 2D engineered material, I will then move on potential applications on geometrically deformed lattices. In a curved background, the natural expectation is that curvature works toward the restoration of an internal symmetry. I will show instead that, for topological defects, the competing action of the locally induced curvature and of boundary conditions generated by the non-trivial topology allows configurations where symmetries can be spontaneously broken close to the core.

[Seminar] "Constraining Quantum Gravity from the Bottom-up" by Dr. Scott Melville

2018-08-14
A720, Lab 3

Gravity on large scales is relatively well understood. For galaxies, planets and apples: we have Einstein’s General Relativity with which to make accurate predictions. But on small scales, where quantum mechanics becomes important, gravity is more difficult to understand, and as a result we lack precise descriptions of various natural phenomena (such as black holes).

One way to make progress in in our search for quantum gravity is to start from the large scale theory we know and love (at the ‘bottom’), and look for ways in which it may be modified and improved as we zoom in to smaller scales (going ‘up’ to a more fundamental theory).

Recent progress in ‘Effective Field Theory’ may shed some light on the connections between large and small scale physics. By exploiting certain physical properties of scattering probabilities (e.g. that they are unitary, causal and local), one can derive an infinite number of constraints which any large scale theory must satisfy in order to admit a sensible small scale completion.

In this talk, I will provide an overview of these new ‘positivity constraints’, and discuss their implications for quantum gravity.        

QG group meeting - the complex action of GR and black hole entropy

2018-08-13
Lab 3, A719

QG group meeting
Speaker: Yasha Neiman
Title: "The complex action of GR and black hole entropy"

QG group meeting: Holography and Quantum Error Correction

2018-08-06
Lab 3, A719

 

QG group meeting
Speaker: Henry Stoltenberg
Title: Tales from PiTP 2018: Holography and Quantum Error Correction

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