A gate-tunable graphene Josephson parametric amplifier

First-principles study on the electronic properties of biphenylene, net-graphene, graphene+, and T-graphene based nanoribbons

“…However, the current decreases with the increase of bias voltage at 1.6-2 V, indicating that the A11-10 device have a good NDR effect. Therefore, the A11-10 device have potential applications in logic gates, 62 ampliers, 63 and high-frequency oscillators. [64][65][66] Further analysis of the I-V characteristic curves of the remaining devices reveals the presence of NDR effects in all of them.…”

Utilizing Gate-Controlled Supercurrent for All-Metallic Tunable Superconducting Microwave Resonators

“…For example, JJs based on hybrid semiconductor−superconductor nanostructures have been used to realize voltage-tunable superconducting qubits 19−21 and near-quantum limited parametric ampli-fiers. 22,23 This type of JJ allows for tuning the junction resistance with a gate voltage, thereby changing a JJ's critical current and, in turn, its Josephson inductance (L J = ℏ/(2eI c )). Another promising approach utilizes a junction made of a semiconducting nanowire in contact with superconducting electrodes.…”

“…Recent studies have demonstrated tunable superconducting resonators with locally tunable elements. For example, JJs based on hybrid semiconductor–superconductor nanostructures have been used to realize voltage-tunable superconducting qubits − and near-quantum limited parametric amplifiers. , This type of JJ allows for tuning the junction resistance with a gate voltage, thereby changing a JJ’s critical current and, in turn, its Josephson inductance ( L J = ℏ/(2 eI c )). Another promising approach utilizes a junction made of a semiconducting nanowire in contact with superconducting electrodes. − This component takes advantage of voltage-tunability of the electron density and the induced superconducting gap of the nanowire, enabling gate-tunable resonance and gate-tunable parametric amplifier .…”

Demonstration of the Nonlocal Josephson Effect in Andreev Molecules

“…The development of high-quality hybrid superconductor–semiconductor materials over the past decade enabled new possibilities in superconducting electronics and quantum computing. − In particular, Andreev bound states (ABSs) − arising in superconductor–semiconductor–superconductor Josephson junctions (JJs) − offer functionalities not attainable in metallic JJs. A prominent example is the electrostatic tuning of the critical current, ,, which allows for JJ field-effect transistors, − voltage-tunable superconducting qubits, − resonators, , and amplifiers. − Moreover, the interplay between ABSs, spin–orbit interaction, and Zeeman fields results in nonreciprocal switching currents − and anomalous phase offsets, or φ 0 -junctions, − with applications in superconducting electronics and spintronics . A yet largely unexplored possibility offered by superconductor–semiconductor hybrids is the engineering of Andreev molecules from the hybridization of spatially overlapping ABSs. − Predicted to arise in JJs coupling over length scales comparable to the superconducting coherence length, Andreev molecules offer a promising platform to realize φ 0 -junctions and novel manipulation and coupling schemes for Andreev qubits .…”