Tunable Superconducting Flux Qubits with Long Coherence Times

Longitudinal Coupling Synthesis in Superconducting Qubits

“…Here, we do not consider the kinetic inductance of the loop as the geometric inductance of the loop is much larger than the kinetic inductance, which is estimated according to ref. [37]. Under these conditions, the flux quantization conditions of the f ε1 , f ε2 , and f α loops are…”

“…Here, we do not consider the kinetic inductance of the loop as the geometric inductance of the loop is much larger than the kinetic inductance, which is estimated according to ref. [37]. Under these conditions, the flux quantization conditions of the f ε1 , f ε2 , and f α loops arerespectively.…”

Optimized emulation of quantum magnetometry via superconducting qubits

“…For experimentally realistic values of the magnetic moment μ and of the relaxation or coherence times T 1 and T 2 , we refer to Refs. [17,40]. This set of parameters leads us to the final inaccuracy in the magnetic-field estimation of approximately 10 −12 T. We analyze the algorithm through the simulation of detection of magnetic fields in the range of [0; 50] nT, requiring the initial time of t 0 ≈ 40 ns, which is implementable using state-of-the-art transmon qubits [41].…”

Parity-spin superconducting qubit based on topological insulators

“…A major milestone was the introduction of the Transmon qubit [13], which provides remarkable protection against dephasing. In a recent decade, remarkable progress has been made in extending coherence times [14,15], and demonstrating high-fidelity single-and two-qubit gates [16][17][18][19][20][21][22][23]. Such advances are enabled not only by technological improvements but also by innovations in qubit architectural designs [24][25][26].…”