How Close are Antimatter Reactors?

What if we could get to Proxima Centauri in 40 years? Modern rockets would take 30,000 years to make the journey, but according to proponents, antimatter reactors could take that down to just 40 years. But how do they work? And when can we expect them? Antimatter was first theorised by Paul Dirac, the father quantum electrodynamics, when he discovered in 1928 that both positive and negative energy solution would satisfy his relativistic version of the Schrödinger wave equation for electrons meaning that the electron might have an equal but opposite particle in existence, that had the same mass and spin but the opposite charge, an anti-electron). Bit of background here: https://www.nasa.gov/directorates/spacetech/niac/2018_Phase_I_Phase_II/Radioisotope_Positron_Propulsion/ Are you interested in launching a start up company from your research? Check out my Skillshare course on "How to Start A Company From Your Research": https://skl.sh/2QiD3fS A few people have asked so I've added the info below. Some/all of these may be affiliate links. If you make a purchase it doesn't cost you anything extra, but a percentage of the sale will help support this channel and my work to bringing entrepreneurship into science. My gear: My camera : https://amzn.to/3ed5Xac My lens: https://amzn.to/3xIAZyA My lav: https://amzn.to/2SeE20Y and https://amzn.to/3nK33wA My mic: https://amzn.to/3gUYYEv