Cosmological constant is a conserved charge

Dmitry Chernyavsky, Kamal Hajian

Результат исследований: Материалы для журналаСтатья

Выдержка

Cosmological constant can always be considered as the on-shell value of a top form in gravitational theories. The top form is the field strength of a gauge field, and the theory enjoys a gauge symmetry. We show that cosmological constant is the charge of the global part of the gauge symmetry, and is conserved irrespective of the dynamics of the metric and other fields. In addition, we introduce its conjugate chemical potential, and prove the generalized first law of thermodynamics which includes variation of cosmological constant as a conserved charge. We discuss how our new term in the first law is related to the volume-pressure term. In parallel with the seminal Wald entropy, this analysis suggests that pressure can also be considered as a conserved charge.

Язык оригиналаАнглийский
Номер статьи125012
ЖурналClassical and Quantum Gravity
Том35
Номер выпуска12
DOI
СостояниеОпубликовано - 25 мая 2018

Отпечаток

symmetry
field strength
entropy
thermodynamics

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Цитировать

Cosmological constant is a conserved charge. / Chernyavsky, Dmitry; Hajian, Kamal.

В: Classical and Quantum Gravity, Том 35, № 12, 125012, 25.05.2018.

Результат исследований: Материалы для журналаСтатья

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AB - Cosmological constant can always be considered as the on-shell value of a top form in gravitational theories. The top form is the field strength of a gauge field, and the theory enjoys a gauge symmetry. We show that cosmological constant is the charge of the global part of the gauge symmetry, and is conserved irrespective of the dynamics of the metric and other fields. In addition, we introduce its conjugate chemical potential, and prove the generalized first law of thermodynamics which includes variation of cosmological constant as a conserved charge. We discuss how our new term in the first law is related to the volume-pressure term. In parallel with the seminal Wald entropy, this analysis suggests that pressure can also be considered as a conserved charge.

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