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- W2810381013 abstract "In [Schmidt PRD 80 123003 (2009)], the author suggested that dynamical dark energy (DDE) propagating on the phantom brane could mimick $Lambda$CDM. Schmidt went on to derive a phenomenological expression for $rho_{rm DE}$ which could achieve this. We demonstrate that while Schmidt's central premise is correct, the expression for $rho_{rm DE}$ derived in Schmidt (2009) is flawed. We derive the correct expression for $rho_{rm DE}$ which leads to $Lambda$CDM-like expansion on the phantom brane. We also show that DDE on the brane can be associated with a Quintessence field and derive a closed form expression for its potential $V(phi)$. Interestingly the $alpha$-attractor based potential $V(phi) propto coth^2{lambdaphi}$ makes braneworld expansion resemble $Lambda$CDM. However the two models can easily be distinguished on the basis of density perturbations which grow at different rates on the braneworld and in $Lambda$CDM." @default.
- W2810381013 created "2018-07-10" @default.
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- W2810381013 date "2018-06-26" @default.
- W2810381013 modified "2023-10-12" @default.
- W2810381013 title "Emulating a<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>Λ</mml:mi><mml:mi>CDM</mml:mi></mml:mrow></mml:math>-like expansion on the phantom brane" @default.
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- W2810381013 doi "https://doi.org/10.1103/physrevd.97.123537" @default.
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