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z - KICP Workshops - University of Chicago

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5<br />

Dark Energy<br />

• What is the physical cause <strong>of</strong> cosmic acceleration?<br />

– Dark Energy or modification <strong>of</strong> General Relativity?<br />

• If Dark Energy, is it Λ (the vacuum) or something else?<br />

– What is the DE equation <strong>of</strong> state parameter w and<br />

(how) does it evolve?<br />

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