The Gateway Process aimed to transcend space-time and commune with other-dimensional beings by using the energy of the mind and body, drawing on consciousness-altering methodologies and quantum mechanics, but its theories are a controversial mixture of accepted physics theories and seemingly made-up statements.
In 1983, the CIA commissioned Lt. Col. Wayne M. McDonnell to write a report on the Gateway Process, a project that aimed to use the energy of the mind and body to transcend space-time and commune with other-dimensional beings. The report, which was declassified in 2003, contained instructions and technical assistance on how to achieve this. The Gateway Process relied on various consciousness-altering methodologies, including biofeedback, transcendental meditation, Kundalini yoga, and hypnosis. It also drew on quantum mechanics and theoretical physics to explain the nature and functioning of human consciousness. However, the report’s theories and statements are controversial and are a mixture of physics theories that have some acceptance and statements that sound entirely made up.
Source: https://www.popularmechanics.com/science/a43418400/cia-gateway-process-explained/