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Abstract
Fermion dynamics distinguishes spacetimes having the same metric g μν , but different tetrads e μa , and in particular, it distinguishes a lapse with negative sign, N < 0 (M. Christodoulou, A. Riello, and C. Rovelli, Int. J. Mod. Phys. D 21, 1242014 (2012)). Here, we show that the quasiequilibrium thermodynamic state may exist, in which the region with N < 0 has negative local temperature T(r) < 0, while the global Tolman temperature T 0 remains positive. For bosons, only N 2 matters. However, if bosons are composite, they may inherit negative T(r) from the fermions, and thus they may distinguish the spacetimes with positive and negative lapse functions via thermodynamics.
Original language | English |
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Pages (from-to) | 8-11 |
Number of pages | 4 |
Journal | JETP Letters |
Volume | 109 |
Issue number | 1 |
Early online date | 1 Jan 2019 |
DOIs | |
Publication status | Published - 1 Jan 2019 |
MoE publication type | A1 Journal article-refereed |
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Dive into the research topics of 'Negative Temperature for Negative Lapse Function'. Together they form a unique fingerprint.Projects
- 1 Finished
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TOPVAC: From Topological Matter to Relativistic Quantum Vacuum
Volovik, G. (Principal investigator), Nissinen, J. (Project Member), Eltsov, V. (Project Member), Rysti, J. (Project Member), Rantanen, R. (Project Member), Mäkinen, J. (Project Member), Zhang, K. (Project Member), Volard, M.-M. (Project Member), Kamppinen, T. (Project Member) & Ikäheimo, A. (Project Member)
01/10/2016 → 30/09/2022
Project: EU: ERC grants