ER=EPR is a conjecture in physics stating that entangled particles are connected by a wormhole (or Einstein-Rosen Bridge).The conjecture was proposed by Leonard Susskind and Juan Maldacena in 2013. They proposed that a nontraversable wormhole (Einstein-Rosen bridge) is equivalent to a pair of maximally entangled black holes. EPR refers to quantum entanglement (EPR paradox). They backed up their conjecture by showing that the pair production of charged black holes in a background magnetic field leads to entangled black holes, but also, after Wick rotation, to a wormhole.