Most Efficient Transition to Best Glide?

[Slick Goodlin]

The other thread about climb speed got me thinking about this.  Let's say sometime after takeoff the fan stops turning and you want to be as efficient as possible.  For a bare minimum energy loss, how aggressively do you put the nose down?  Would pitching down at zero G technically work best as you'd be on a parabolic trajectory, possibly with no induced drag during the maneuver?

I may be over thinking this.