# FOUR-PARTICLE CONDENSATE IN STRONGLY COUPLED FERMION SYSTEMS

@article{Roepke1998FOURPARTICLECI, title={FOUR-PARTICLE CONDENSATE IN STRONGLY COUPLED FERMION SYSTEMS}, author={Gerd Roepke and A. Schnell and Peter Schuck and Philippe Nozi{\`e}res}, journal={Physical Review Letters}, year={1998}, volume={80}, pages={3177-3180} }

Four-particle correlations in fermion systems at finite temperatures are investigated with special attention to the formation of a condensate. Instead of the instability of the normal state with respect to the onset of pairing described by the Gorkov equation, a new equation is obtained which describes the onset of ``quartetting.'' Applying to symmetric nuclear matter, below a critical density, the four-particle condensation ( $\ensuremath{\alpha}$-like quartetting) is found to be favored over… Expand

#### 155 Citations

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Abstract
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Abstract The onset of quartetting, i.e. α -particle condensation, in symmetric nuclear matter is studied with the help of an in-medium modified four nucleon equation. It is found that at very low… Expand

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The theory of quartet condensation is further developed. The onset of quartet- ting in homogeneous fermionic matter is studied with the help of an in-medium modified four fermion equation. It is… Expand

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