The Meissner effect is a phenomenon in quantum physics that occurs when a superconductor expels magnetic flux from its interior upon entering the superconducting state. In this state, a superconductor exhibits zero electrical resistance, allowing electric current to flow without dissipation of energy.
When the superconductor is subjected to an external magnetic field, it generates currents that produce magnetic fields opposing the applied field. This results in the expulsion of the magnetic flux lines from the interior of the superconductor, effectively creating a perfect diamagnetic environment within its bulk.
The Meissner effect is a defining characteristic of superconductivity and is crucial for various applications, including quantum levitation. An example of the Meissner effect in action is observed when a superconductor is cooled below its critical temperature and placed near a magnet. The superconductor repels the magnetic field, causing it to levitate above the magnet due to the expulsion of magnetic flux lines from its interior.
