The '''quantum Hall effect''' occurs when a low-temperature electron gas in a two-dimensional plane is subjected to a strong perpendicular magnetic field. The resulting in-plane transverse conductance of the electrons is such that "the electrical conductance is quantized and can change only in discrete steps."<ref>http://physicsworld.com/cws/article/news/2018/jan/9/quantum-hall-effect-in-4d-is-created-in-the-lab</ref>
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The '''quantum Hall effect''' occurs when a low-temperature electron gas in a two-dimensional plane is subjected to a strong perpendicular magnetic field. The resulting in-plane transverse conductance of the electrons is such that "the electrical conductance is quantized and can change only in discrete steps."<ref>{{Cite web|url=http://physicsworld.com/cws/article/news/2018/jan/9/quantum-hall-effect-in-4d-is-created-in-the-lab|title=Quantum Hall effect in 4D is created in the lab|accessdate=2018-09-26}}</ref>