Special Events

Leonard Susskind / Daniel Freedman 80+ Birthday Symposium and Celebration

Fri October 7th - Sat October 8th 2022, All day
Stanford Campus, Tresidder Oak Lounge (2nd Floor), 498 Santa Teresa St. Stanford, CA 94305

Celebrating the life and work of Professors Leonard Susskind and Daniel Freedman

October 7: All day & evening

October 8: All day


**Due to space constraints this event is by invitation only**

Leonard Susskind is the Felix Bloch professor of Theoretical physics at Stanford University. His research interests include string theory, quantum field theory, quantum statistical mechanics and quantum cosmology. He is a member of the National Academy of Sciences of the USA, and the American Academy of Arts and Sciences.







Daniel Z. Freedman is an Emeritus Professor of Applied Mathematics and Physics at the Massachusetts Institute of Technology (MIT) and is currently a visiting professor at Stanford University. He is famous for his pioneering work on supergravity for which he received the  Special Breakthrough Prize in Fundamental Physics, the 2006 Dannie Heineman Prize of the APS, and 1993 Dirac Medal. He has contributed to numerous areas of high energy physics, from the AdS/CFT duality to his proposal for the experimentally confirmed elastic neutrino-nucleus scattering. He is a member of the U. S. National Academy of Sciences and the American Academy of Arts and Sciences.


View Participant List here

Program Schedule, Day 1:




Fri, Oct.7th 


8:45 AM



9:45 AM

Welcoming Remarks 

Patrick Hayden

9:50 AM

Bouncing geodesics revisited

Steve Shenker

10:20 AM

Supergravity in the UV.

Zvi Bern

10:50 AM



11:40 AM

How to succeed at holographic correlators without really trying

Leonardo Rastelli

12:10 PM

Complexity & Physics

Adam Brown

12:40 PM



2:30 PM

Following Lenny's Lead

John Preskill

3:00 PM

Anomalies and Hamiltonian Lattice Gauge Theory

Nathan Seiberg

3:30 PM

COFFEE BREAK (Group Photo)


4:30 PM

Some thoughts on Dan, Lenny, and holographic entanglement

Matthew Headrick 

5:00 PM

Group Invariant States as Quantum Many-Body Scars

Igor Klebanov 

5:30 PM

The Universe as a Quantum Encoder

Andrew Strominger 

6:00 PM



6:30 PM

Presentation by Dan’s family then remarks from Dan

6:40 PM

Toast to Dan and Lenny

Igor Klebanov

6:45 PM



When bellies are full:

Presentation by Lenny’s family then remarks from Lenny

8:30 PM (roughly)




Program Schedule, Day 2:

Sat, Oct. 8th 


8:45 AM



9:50 AM

Higher-derivative interactions in string theory and holography

Silviu Pufu

10:20 AM

Matrices and Quantum Gravity

Clifford Johnson 

10:50 AM



11:30 AM

Holographic bound in Cosmology, one of my many fun journeys with Lenny

Willy Fischler

12:00 PM

Toward String Theory from Low-Energy

Henriette Elvang

12:30 PM

String Theory: The Early History

John Schwarz

1:00 PM



2:40 PM

Snapshots from my Worldline

Luis Alvarez-Gaume

2:50 PM

30 years of research inspired by Dan Freedman

Johanna Erdmenger

3:20 PM

The Cosmic Neutrino Background on the Earth

Savas Dimopoulos

3:50 PM



4:30 PM

Space versus Time

Claudio Bunster

5:00 PM

A look back at the early times of gauged supergravity

Barton Zwiebach

5:30 PM

Wormholes and global symmetry violation in high energy amplitudes

Juan Maldacena

6:00 PM

Closing Remarks 


6:05 PM



We have reserved blocks of rooms at the following local hotels. Please book as soon as possible to benefit from discounted rates.

Creekside Inn 

Stanford Guest House

Group code: FREE22

Book via link above or by calling 650-926-2800

Hotel Parmani 

Group code: SPC.
Guests may book directly on our website using the code for the symposium. 

Cardinal Hotel: This is the direct link to book discounted rate 

Other local hotels: 

Zen Hotel


Parking on Stanford campus requires a permit on the Friday. Permits can be purchased here.

Navigating Stanford campus:

Your phone is likely  to tell you everything you need to know to get around Stanford’s campus, but the following site collects a number of useful maps if you’d like to consult them.