Is there good evidence behind this 1950s anti-gravity story?

The connection needs to be shown step by step, not just named together. The Bohm-Aharonov effect is a quantum phenomenon involving how electromagnetic potentials can affect particle behavior. That fact alone does not show that anyone found a way to control gravity, or that such research was shut down.

For the suppression claim, look for dated records that independently establish the research, the decision to stop it, and who made that decision. Without those, the story is an allegation rather than a documented chain of events.

I’d separate the pieces before deciding whether the whole story holds up. Is there a specific 1950s experiment or paper? Is there a record that it was halted? And is there evidence tying that decision to the people and later claims mentioned? A name or scientific term appearing in the same story is not enough to prove a connection.

From the description here, there isn’t enough material to verify the claim. A useful next step is to ask for the original documents being referenced, with dates and enough context to check what they actually say. Then compare that wording with the stronger claims being made about anti-gravity and suppression.

If the argument depends on several links, each link needs support. If one is missing, it’s fair to treat the overall explanation as unconfirmed rather than as established history.