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Everything about Second quantization

Formulation of the quantum many-body problem

Second quantization, also referred to as occupation number representation, is a formalism used to describe and analyze quantum many-body systems. In quantum field theory, it is known as canonical quantization, in which the fields are thought of as field operators, in a manner similar to how the physical quantities are thought of as operators in first quantization. The key ideas of this method were introduced in 1927 by Paul Dirac, and were later developed, most notably, by Pascual Jordan and Vladimir Fock. In this approach, the quantum many-body states are represented in the Fock state basis, which are constructed by filling up each single-particle state with a certain number of identical particles. The second quantization formalism introduces the creation and annihilation operators to construct and handle the Fock states, providing useful tools to the study of the quantum many-body theory. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Second quantizationA 5-minute orientation
  2. Skim a recent paper: Quantum computation for periodic solids in second quantizationInfluential work since 2022
  3. Pick up a classic book: The Elements of Statistical LearningThe most-reprinted book on the subject
  4. Read the landmark paper: Second quantization in the Kerr metricCited 235 times
  5. Go sideways: Glossary of elementary quantum mechanicsA closely related topic
  6. Go sideways: Anti-symmetric operatorA closely related topic

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