I'm uncertain what you mean by a lesser energy state that gives rise to expansion, as in the interior of a black hole.
The interior of a black hole is not really defined. At the edges of a black hole there is, possibly, a region of infinite distance, but I am uncertain if it is meaningful to say whether or not it expands.
I can guess, and say you are talking about cosmic expansion. Current theory holds that this isn't really a low energy state, so much as the default state of all space, it is just that the effect is so weak that normally gravity completely overwhelms it. (That is, space is always stretching out very slowly, but in gravity wells this effect isn't noticeable because everything is falling inward far faster than the expansion could push everything apart.)
The interior of a black hole is not really defined. At the edges of a black hole there is, possibly, a region of infinite distance, but I am uncertain if it is meaningful to say whether or not it expands.
I can guess, and say you are talking about cosmic expansion. Current theory holds that this isn't really a low energy state, so much as the default state of all space, it is just that the effect is so weak that normally gravity completely overwhelms it. (That is, space is always stretching out very slowly, but in gravity wells this effect isn't noticeable because everything is falling inward far faster than the expansion could push everything apart.)