Quantum tunneling is a phenomenon in quantum mechanics where particles can pass through potential barriers that would be classically insurmountable. However, it is important to note that quantum tunneling does not involve changing the fundamental nature of the forces between particles. It allows particles to traverse barriers that would normally be difficult to overcome, but it doesn't reverse or eliminate the underlying forces themselves.
In the scenario you described, where two particles have opposite charges (+ and -) and are attracting each other, quantum tunneling wouldn't directly change the attractive nature of the electromagnetic force between them. Quantum tunneling can enable particles to pass through barriers, but it doesn't alter the nature of the forces acting between them.
To separate particles with opposite charges, you would typically need to apply an external force that opposes the electromagnetic attraction. This force could be generated by other particles or by some external agent. However, it's important to recognize that overcoming the attractive force would require energy input, and the particles would tend to be attracted to each other due to their opposite charges. Quantum tunneling, on its own, wouldn't provide a mechanism to separate them in this scenario.