I was reading John Cramers column and came across the AAVP Effect. See references below. Basically, if you have spaceship that can be subjected to a quantum-indeterminate speed (or like in the article a quantum-indeterminate mass/gravity) then the spaceship can then experience a superposition of time evolutions. Well, in the AAVP paper it says it can happen statistically once out of every 10,000 trials. This means the spaceship could age forward or backward in an extreme way. Notice I said "age" and not travel in time. Anyway, it was an interesting article about a thought-experiment. Yakir Aharonov, the originator of the idea, doesn't claim it could actually be done. My question is what a quantum-indeterminate speed device might be like? What exactly does quantum-indeterminate mean? Does it mean a superposition of speed? Like a double slit with a fast path and a slow path? I'm grasping at straws because I really don't understand "quantum-indeterminate". Any ideas? John G. Cramer Alternate View Column AV-45 http://www.npl.washington.edu/AV/altvw45.html AAVP Effect: "Superposition of Time Evolutions of Quantum System and a Quantum Time Translation Machine", Yakir Aharonov, Jeeva Anandan, Sandu Popescu, and Lev Vaidman, Physical Review Letters 64, 2965 (1990).