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Results tagged with second-quantization
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user 272562
Second quantization or canonical quantization in quantum field theory and many-body systems is the collective organizing and accounting of an infinity of quantum excitations and their interactions through quantum field operators.
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Some help on second-quantization formalism?
I'm reading Schwabl's Advanced Quantum Mechanics and I'm having issues with understanding this line:
$$\langle\psi|a_i^\dagger a_j^\dagger a_ma_k|\psi\rangle=\langle\psi|(\delta_{im}\delta_{jk}a_m^\da …
- 186
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Two-particle states of bosons
I'm reading Advanced Quantum Mehcanics of Schwabl and I'm having a hard time trying to reproduce this calculation (page 57). Consider the following general two-particle state:
$$\displaystyle{|2\rangl …
- 186
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What is the difference between a single-particle potential energy and an interaction?
When we set up Hartree-Fock equations for atoms we work with the following Hamiltonian:
$\displaystyle{H=\sum_{i,j}a_i^\dagger \langle i|T|j\rangle a_j+\sum_{i,j} a_i^\dagger \langle i|U|j\rangle a_j …
- 186