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Giovanni Jona-Lasinio

Giovanni Jona-Lasinio 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 Giovanni Jona-Lasinio rather than just read about it. In short: Giovanni Jona-Lasinio (born 1932), sometimes called Gianni Jona, is an Italian theoretical physicist, best known for his works on quantum field theory and statistical mechanics. He pioneered research concerning spontaneous symmetry breaking, and the Nambu–Jona-Lasinio model is named after him.

Giovanni Jona-Lasinio — main illustration
Giovanni Jona-Lasinio — illustration

Key takeaways

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

Reference excerpt

Giovanni Jona-Lasinio (born 1932), sometimes called Gianni Jona, is an Italian theoretical physicist, best known for his works on quantum field theory and statistical mechanics. He pioneered research concerning spontaneous symmetry breaking, and the Nambu–Jona-Lasinio model is named after him. When Yoichiro Nambu received the Nobel Prize, Jona-Lasinio gave the Nobel Lecture in his place, as a recognition from Nambu for their joint work. At present, he holds a faculty position in the Physics Department of Sapienza University of Rome, and is a full member of the Accademia dei Lincei.

Life Giovanni Jona-Lasinio was born in Florence, Jewish on his father's side. From 1970 to 1974 he taught electrodynamics at University of Padua. Since 1974 he has been full professor at Sapienza University of Rome, where he teaches mathematical methods of physics. He spent several years abroad, doing his research also at University of Chicago (1959–60), CERN (1964–65), MIT (1965–66), Institut des Hautes Études Scientifiques (1980–81), Université Pierre et Marie Curie (1983–84). In 2004, the Journal of Statistical Physics, a scientific magazine about statistical mechanics, dedicated a special issue in honour of Giovanni Jona-Lasinio.

Nobel Prize controversy Half of the 2008 Nobel Prize in Physics went to Yoichiro Nambu for the discovery of the mechanism of spontaneous broken symmetry in subatomic physics. The fundamental step in this field is the Nambu–Jona-Lasinio model (NJL model), developed together with Jona-Lasinio, who was left out of the prize. In recognition of his colleague's work, Nambu asked Jona-Lasinio to hold the Nobel Lecture at Stockholm University in his place. The other half of the 2008 prize for physics was awarded to Makoto Kobayashi and Toshihide Maskawa for their 1972 work on quark mixing. The resulting quark mixing matrix is known as CKM matrix, after Nicola Cabibbo, Kobayashi, and Maskawa. Like Jona-Lasinio, Cabibbo arguably would have deserved a share of the award. As the Nobel Prize is awarded each year to at most three people for no more than two different research works, in 2008 the committee chose to skip one member each from both the CKM and the NJL workgroups (incidentally, both of them Italian).

Awards 2006: Feltrinelli Prize of the Accademia dei Lincei. 2012: Dannie Heineman Prize for Mathematical Physics of the American Physical Society. 2013: Boltzmann Medal for his contributions to statistical physics, notably phase transitions and the breaking of a continuous symmetry.

See also A biography in Italian The April 2004 issue (Volume 115, Numbers 1-2) of Journal of Statistical Physics in honor of Giovanni Jona-Lasinio A picture of Giovanni Jona-Lasinio Effective action Kenneth Geddes Wilson Nambu-Jona-Lasinio model

External links

Giovanni Jona-Lasinio on INSPIRE-HEP

Illustrations

Giovanni Jona-Lasinio illustration

Worked examples

Example 1 — a first encounter with Giovanni Jona-Lasinio

Start with the simplest possible case. Write down what Giovanni Jona-Lasinio 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 Giovanni Jona-Lasinio 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 Giovanni Jona-Lasinio 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 Giovanni Jona-Lasinio

In research
Giovanni Jona-Lasinio 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 Giovanni Jona-Lasinio 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
Giovanni Jona-Lasinio is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1932 births, 20th-century Italian Jews, 20th-century Italian physicists, so understanding it makes those chapters shorter.
In everyday life
Look for Giovanni Jona-Lasinio 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 Giovanni Jona-Lasinio in 20 minutes

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

Frequently asked questions

What is Giovanni Jona-Lasinio in simple terms?

Giovanni Jona-Lasinio (born 1932), sometimes called Gianni Jona, is an Italian theoretical physicist, best known for his works on quantum field theory and statistical mechanics. He pioneered research concerning spontaneous symmetry breaking, and the Nambu–Jona-Lasinio model is named after him.

Why does Giovanni Jona-Lasinio 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 Giovanni Jona-Lasinio?

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 Giovanni Jona-Lasinio.

Tags

  • 1932 births
  • 20th-century Italian Jews
  • 20th-century Italian physicists
  • Academic staff of the Sapienza University of Rome
  • Italian theoretical physicists
  • Jewish Italian scientists
  • Living people
  • Massachusetts Institute of Technology people
  • People associated with CERN
  • Recipients of the Boltzmann Medal
  • Sapienza University of Rome alumni
  • Scientists from Florence

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