Matter in the Bulk and its Consequences on the Brane: A Possible Source of Dark Energy

Understand

The usual brane world scenario with anti de Sitter bulk has been generalized by considering a general form of energy momentum tensor in the bulk.

• The modified Einstein equation on the brane has been constructed.
• Two examples have been cited of which, the first one shows the usual brane equations when matter in the bulk is a negative cosmological constant.
• In the second example, the bulk matter is in the form of perfect fluid and as a result, an effective perfect fluid is obtained in the brane.