Round 9: Tossup 5

Popular examples of qubits that rely on this phenomenon include transmon and flux qubits. Niobium-titanium and niobium-tin (15[1])alloys are useful because they display this (15[1])phenomenon. (-5[1])A 2015 (-5[1])paper demonstrated that hydrogen sulfide displays this phenomenon above (15[1])200 Kelvin. The Josephson effect occurs between two materials displaying (-5[1])this phenomenon, which is exhibited by the ceramic (*) yttrium barium (10[1])copper (10[1])oxide. (10[1])According to BCS theory, this phenomenon arises from the formation of Cooper pairs. Since this phenomenon causes magnetic fields to be expelled in the Meissner effect, materials displaying it trigger levitation. For 10 points, name this phenomenon in which a material displays zero resistance to current. ■END■

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