Bassel Heiba Elfeky

Feb 10, 2025 | link.aps.org | William Strickland |Bassel Heiba Elfeky |Lukas Baker |Andrea Maiani

Fluxonium qubits are a promising alternative to the conventional transmon for quantum computation using superconducting circuits. The two lowest-energy wave functions are localized, distinct wells in phase space, leading to a suppressed transition-matrix element and longer bit-flip times. There also exists a magnetic flux “sweet spot,” where the qubit frequency is first-order insensitive to flux noise. However, the exact qubit characteristics depend on the exact circuit parameters.

Feb 10, 2025 | journals.aps.org | William Strickland |Bassel Heiba Elfeky |Lukas Baker |Andrea Maiani

Fluxonium qubits are a promising alternative to the conventional transmon for quantum computation using superconducting circuits. The two lowest-energy wave functions are localized, distinct wells in phase space, leading to a suppressed transition-matrix element and longer bit-flip times. There also exists a magnetic flux “sweet spot,” where the qubit frequency is first-order insensitive to flux noise. However, the exact qubit characteristics depend on the exact circuit parameters.

Sep 22, 2023 | link.aps.org | Bassel Heiba Elfeky |William Strickland |Jaewoo Lee |James T. Farmer

Popular Summary Standard Josephson tunnel junctions, formed by two superconducting layers sandwiching a nm-thick insulating barrier, conduct current through the tunneling of Cooper pairs. Current in a Josephson junction based on indium arsenide, however, is carried by coherent reflections of normal electrons and holes at the two interfaces forming Andreev bound states.