### Abstract

The Airy gas model is used to derive an expression for the local kinetic energy in the linear potential approximation. The expression contains an explicit Laplacian term 2/5(ℏ^{2}/2m)∇_{μ}^{2}(r) that, according to jellium surface calculations, must be a universal feature of any accurate local description. Applied to the noble gases the expression reduces the errors by a factor of 50 over previous results obtained by the linear potential approximation.

Original language | English |
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Article number | 052511 |

Pages (from-to) | 525111-525114 |

Number of pages | 4 |

Journal | Physical Review A - Atomic, Molecular, and Optical Physics |

Volume | 61 |

Issue number | 5 |

Publication status | Published - May 2000 |

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics

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## Cite this

Vitos, L., Johansson, B., Kollár, J., & Skriver, H. L. (2000). Local kinetic-energy density of the Airy gas.

*Physical Review A - Atomic, Molecular, and Optical Physics*,*61*(5), 525111-525114. [052511].