This Fest, which celebrated Dudley's and Dan's 90th birthdays, was held on June 18, 2022 at the American Academy in Cambridge, MA. Talks by distinguished colleagues Yuan Lee and Bill Phillips highlighted the lives and work of the two jubilarians and celebrated their friendship.

In addition, a talk by Horst Schmidt-Böcking marked the centenary of the Stern-Gerlach experiment that was paramount to the rise of the research areas of both celebrants. The current state of the art in these research areas was reviewed by Kang-Kuen Ni.

The program also included a musical tribute by Yo-Yo Ma and a performance of the Brahms clarinet quintet. A subsequent reception and dinner provided good fare and opportunities for impromptu comments and merriments.

A detailed program of the Fest is posted on this website along with various materials about the celebrants, including memorable photos and links to interviews.

Video: Musical Tribute by Yo-Yo Ma
Video: Talks & Brahms Clarinet Qintet


Herschbach and Kleppner Families in Australia


We have been delighted by this Fête and this opportunity to get together with family, friends, and colleagues. We deeply appreciate the efforts you have made to be here, in many cases coming great distances
We are grateful to those who spoke kindly of us at this event and to our institutions - the Harvard Chemistry Department and the MIT Department of Physics - for their support.
We thank YoYo Ma for his gracious tribute and also the chamber Quintet.
Finally, we thank Bretislav Friedrich, John Doyle, Georgene Herschbach, and Beatrice Kleppner for planting the seed for this event and laboring endless hours to make it flower.

Dudley Herschbach
Dan Kleppner

We gratefully acknowledge the financial support for the Fest from

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