The Casimir Effect and the Warp Bubble

In the Casimir effect, you bring two surfaces very close together and you get lower energy density between the surfaces then around it. That doesn't necessarily mean actually negative energy density from a GR perspective but had like an interesting shape. And if you plot the energy between the two plates, you'll see a dip. To make a warp train, you need to also kind of create this dip in energy behind you. But we don't know again if the Casimir effects relative decrease in energy density would actually create the kind of expansion of space we need for the warp bubble.