Fabris, Júlio C.Falciano, F. T.Marto, JoãoNeto, N. PintoMoniz, Paulo2018-11-262018-11-262012http://hdl.handle.net/10400.6/6492A quantum cosmological model with radiation and a dilaton scalar field is analyzed. The Wheeler–DeWitt equation in the minisuperspace induces a Schrödinger equation, which can be solved. An explicit wavepacket is constructed for a particular choice of the ordering factor. A consistent solution is possible only when the scalar field is a phantom field. Moreover, although the wavepacket is time-dependent, a Bohmian analysis allows to extract a bouncing behavior for the scale factor.engQuantum cosmologyGravitationQuantum gravityjournal article10.1007/s13538-012-0105-y