# Luis Álvarez-Gaumé

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**Luis Álvarez-Gaumé** (born 1955) is a Spanish theoretical physicist who deals with string theory and quantum gravity.

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## Quotes[edit]

*An Invitation to Quantum Field Theory* (2012)[edit]

Luis Álvarez-Gaumé and Miguel Á. Vázquez-Mozo, *An Invitation to Quantum Field Theory* (2012)

- Quantum field theory is the basic tool to understand the physics of the elementary constituents of matter. … It is both a very powerful and a very precise framework: using it we can describe physical processes in a range of energies going from the few millions electrovolts typical of nuclear physics to the thousands of billions of the Large Hadron Collider (LHC). And all this with astonishing precision.
- Ch. 1 : Why Do We Need Quantum Field Theory After All?

- In spite of the impressive success of quantum mechanics in describing atomic physics, it was immediately clear after its formulation that its relativistic extension was not free of difficulties.
- Ch. 1 : Why Do We Need Quantum Field Theory After All?

- If Dirac’s idea restores the stability of the spectrum by introducing a stable vacuum where all negative energy states are occupied, the so-called Dirac sea, it also leads directly to the conclusion that a single-particle interpretation of the Dirac equation is not possible.
- Ch. 1 : Why Do We Need Quantum Field Theory After All?

- In 1929 Oskar Klein stumbled into an apparent paradox when trying to describe the scattering of a relativistic electron by a square potential using Dirac’s wave equation. … In order to capture the essence of the problem without entering into unnecessary complication we will study Klein’s paradox in the context of the Klein– Gordon equation.
- Ch. 1 : Why Do We Need Quantum Field Theory After All?