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I am looking for the name/author of a short story about a man who is possibly a prisoner of sorts that is launched on what is supposed to be a one way trip about a spaceship. He overrides the computer and returns to Earth where, due to relativistic effects, eons have passed and much of Earth is a wasteland. He encounters an "evolved" human woman who controls/seduces/enslaves him, in part with pheromones.
Sorry if this is confusing, I remeber really enjoying this story when I read it as a teenager, sometime in the '80s. It might have been published in Omni magazine since that's where I read a lot of sci-fi short stories back then, but I can't be certain.
Thanks in advance.
EDIT1: I'm sorry if it's fuzzy, it was probably in the early 80's when I was in Jr./Sr. High and a lot has happened in the 30+ years since I read it. The more I think about it, the more certain I am that it was in Omni since, I almost never got rid of books that I liked.
I believe that the man was being punished for some heinous crime (murder?) and this was his punishment. He was put in some kind of suspended animation and his compliance in performing the tasks he was assigned was dependent on his will to survive (or at least thats how I recall the story explaining the logic of sending a prisoner into space alone in a very expensive spaceship)