physics

Steven Frautschi

Steven Frautschi is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Steven Frautschi rather than just read about it. In short: Steven C. Frautschi (; born December 6, 1933) is an American theoretical physicist, and professor of physics emeritus at the California Institute of Technology (Caltech).

Key takeaways

Steven Frautschi belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Steven Frautschi to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Steven Frautschi from memory before moving on to harder problems.

Reference excerpt

Steven C. Frautschi (; born December 6, 1933) is an American theoretical physicist, and professor of physics emeritus at the California Institute of Technology (Caltech). He is known principally for his contributions to the bootstrap theory of the strong interactions and for his contribution to the resolution of the infrared divergence problem in quantum electrodynamics (QED). He was named a Fellow of the American Physical Society in 2015 for "contributions to the introduction of Regge poles into particle physics, elucidation of the role of infrared photons in high energy scattering, and for seminal contributions to undergraduate physics education".

Education and employment Frautschi graduated from Harvard College in 1954 and received his PhD from Stanford University in 1958, having written his dissertation on PC conservation in strong interactions and wide angle pair production and quantum electrodynamics at small distances, under the supervision of Sidney Drell. Frautschi worked as a postdoctoral researcher in the groups of Hideki Yukawa at Kyoto University and later of Geoffrey Chew at the University of California, Berkeley. He was an assistant professor at Cornell University before moving to Caltech in 1962. At Caltech he was the Executive Officer for Physics in 1988-97, and Master of Student Houses in 1997-2002. He received the Feynman Prize for Excellence in Teaching in 2014.

Work

Subjects of his works In 1961, Chew and Frautschi discovered that the mesons fall into straight-line Regge trajectories (in their scheme, spin is plotted against mass squared on a so-called Chew–Frautschi plot), and the two of them introduced the pomeron into the western literature. Frautschi's most well known contribution to strong-interaction theory was the statistical bootstrap, a prediction that the number of hadronic states grows exponentially with energy. This is nowadays understood as a manifestation of the deconfinement phase transition. The exponential growth is incorporated into string theory, where it is known as the Hagedorn temperature. (This S-matrix approach to the strong interactions was largely abandoned by the particle physics community in the 1970s in light of quantum chromodynamics.) In 1961, with Donald R. Yennie and Hiroshi Suura, he elucidated the role of infrared photons properly summed in high-energy QED. This work was one of the keys to solving the problem of infrared divergences in gauge theories. One of Frautschi's doctoral students at Caltech was Roger Dashen.

Publications 1982 Entropy in an Expanding Universe. Science 13/08/1982: Vol. 217, Issue 4560, pp. 593–599 (DOI: 10.1126/science.217.4560.593) 1986 The Mechanical Universe, Mechanics and Heat, Advanced Edition, textbook (Steven C. Frautschi, Richard P. Olenick, Tom M. Apostol, David L. Goodstein). New York: Cambridge University Press (1st pbk. ed. 2008).

Family His daughters, Jennifer and Laura, are both professional violinists.

References

Worked examples

Example 1 — a first encounter with Steven Frautschi

Start with the simplest possible case. Write down what Steven Frautschi claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Steven Frautschi before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Steven Frautschi ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Steven Frautschi

In research: Steven Frautschi appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Steven Frautschi in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Steven Frautschi is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1933 births, 21st-century American physicists, American theoretical physicists, so understanding it makes those chapters shorter.
In everyday life: Look for Steven Frautschi outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Steven Frautschi in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Steven Frautschi means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Steven Frautschi out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Steven Frautschi in simple terms?

Steven C. Frautschi (; born December 6, 1933) is an American theoretical physicist, and professor of physics emeritus at the California Institute of Technology (Caltech).

Why does Steven Frautschi matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Steven Frautschi?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Steven Frautschi.