# David Mermin

David Mermin

N. David Mermin
Born 30 March 1935 (age 81)
New Haven, Connecticut, U.S.
Residence United States
Fields Physicist
Institutions Cornell University
University of California, San Diego
University of Birmingham
Alma mater Harvard University
Known for Mermin–Wagner theorem
Mermin–Ho relation
Lindhard–Mermin dielectric function
Coining the term 'boojum'
Mermin–Peres magic square
Notable awards Lilienfeld Prize (1989)
Klopsteg Memorial Award (1994)
Majorana Prize (2010)
American Philosophical Society(2015)

Nathaniel David Mermin (/ˈmɜːrmɪn/; born 1935) is a solid-state physicist at Cornell University best known for the eponymous Mermin–Wagner theorem, his application of the term "Boojum" to superfluidity, and for the quote "shut up and calculate!" (in the context of the interpretation of quantum mechanics).[1]

In 1976, Neil Ashcroft and Mermin published a textbook on solid-state physics. As a proponent of Quantum Bayesianism, Mermin described the concept in Nature.[2]

In 2003, the journal Foundations of Physics published a bibliography of Mermin’s writing that included three books, 125 technical articles, 18 pedagogical articles, 21 general articles, 34 book reviews, and 24 "Reference Frame" articles from Physics Today.[3]

## Mermin's foot

Mermin has contributed to special relativity with two books and several articles. In It's About Time (2005) he suggests that the English foot (0.3048 meters) be slightly modified:

Henceforth, by 1 foot we shall mean the distance light travels in a nanosecond. A foot, if you will, is a light nanosecond (and a nanosecond, even more nicely, can be viewed as a light foot). …If it offends you to redefine the foot … then you may define 0.299792458 meters to be 1 phoot, and think "phoot" (conveniently evocative of the Greek φωτος, "light") whenever you read "foot".[4]

This adaptation of a physical unit is one of several ploys that Mermin uses to draw students into space-time geometry.

## References

1. N. David Mermin. "Could Feynman Have Said This?". Physics Today. 57 (5). Bibcode:2004PhT....57e..10M. doi:10.1063/1.1768652.
2. D. Mermin (2014) Physics: QBism puts the scientist back into science, Nature
3. "The Publications of N. David Mermin", Foundations of Physics (2003) 33: 1797 doi:10.1023/A:1026233805919
4. It's About Time, page 22