### Abstract

In plasmas, Debye screening structures the possible correlations between particles. We identify a phase space minimum h* in non-equilibrium space plasmas that connects the energy of particles in a Debye sphere to an equivalent wave frequency. In particular, while there is no a priori reason to expect a single value of h* across plasmas, we find a very similar value of h* ≈ (7.5 ± 2.4)×10^{-22} J·s using four independent methods: (1) Ulysses solar wind measurements, (2) space plasmas that typically reside in stationary states out of thermal equilibrium and spanning a broad range of physical properties, (3) an entropic limit emerging from statistical mechanics, (4) waiting-time distributions of explosive events in space plasmas. Finding a quasi-constant value for the phase space minimum in a variety of different plasmas, similar to the classical Planck constant but 12 orders of magnitude larger may be revealing a new type of quantization in many plasmas and correlated systems more generally.

Original language | English (US) |
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Pages (from-to) | 1118-1134 |

Number of pages | 17 |

Journal | Entropy |

Volume | 15 |

Issue number | 3 |

DOIs | |

State | Published - Mar 2013 |

Externally published | Yes |

### All Science Journal Classification (ASJC) codes

- Physics and Astronomy(all)

### Keywords

- Constants
- Fundamental
- Space plasma
- Thermodynamic properties of plasma

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## Cite this

*Entropy*,

*15*(3), 1118-1134. https://doi.org/10.3390/e15031118