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## Crossing of the cosmological constant boundary - an equation of state description

Štefančić, Hrvoje
Crossing of the cosmological constant boundary - an equation of state description // Journal of Physics A - Mathematical & General, 39 (2006), 6761-6768 (međunarodna recenzija, članak, znanstveni)

Naslov
Crossing of the cosmological constant boundary - an equation of state description

Autori
Štefančić, Hrvoje

Izvornik
Journal of Physics A - Mathematical & General (0305-4470) 39 (2006); 6761-6768

Ključne riječi
Cosmological constant; quintessence; phantom; dark energy

Sažetak
The phenomenon of the dark energy transition between the quintessence regime ($w > -1$) and the phantom regime ($w < -1$), also known as the cosmological constant boundary crossing, is analyzed in terms of the dark energy equation of state. It is found that the dark energy equation of state in the dark energy models which exhibit the transition is {; ; ; ; \em implicitly}; ; ; ; defined. The generalizations of the the models explicitly constructed to exhibit the transition are studied to gain insight into the mechanism of the transition. It is found that the cancellation of the terms corresponding to the cosmological constant boundary makes the transition possible.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Projekt / tema
0098002

Ustanove
Institut "Ruđer Bošković", Zagreb

Autor s matičnim brojem:
Hrvoje Štefančić, (235826)

#### Časopis indeksira:

• Current Contents Connect (CCC)
• Web of Science Core Collection (WoSCC)
• Science Citation Index Expanded (SCI-EXP)
• SCI-EXP, SSCI i/ili A&HCI
• Scopus