Flux-tunable Josephson diode effect in a hybrid four-terminal Josephson junction

M Coraiola, AE Svetogorov, DZ Haxell, D Sabonis… - ACS …, 2024 - ACS Publications
We investigate the direction-dependent switching current in a flux-tunable four-terminal
Josephson junction defined in an InAs/Al two-dimensional heterostructure. The device …

A gate tunable transmon qubit in planar Ge

O Sagi, A Crippa, M Valentini, M Janik… - Nature …, 2024 - nature.com
Gate-tunable transmons (gatemons) employing semiconductor Josephson junctions have
recently emerged as building blocks for hybrid quantum circuits. In this study, we present a …

From nonreciprocal to charge-4e supercurrent in Ge-based Josephson devices with tunable harmonic content

A Leblanc, C Tangchingchai, ZS Momtaz… - Physical Review …, 2024 - APS
Hybrid superconductor (S)-semiconductor (Sm) devices bring a range of functionalities into
superconducting circuits. In particular, hybrid parity-protected qubits and Josephson diodes …

Enhancing the Josephson diode effect with Majorana bound states

J Cayao, N Nagaosa, Y Tanaka - Physical Review B, 2024 - APS
We consider phase-biased Josephson junctions with spin-orbit coupling under external
magnetic fields and study the emergence of the Josephson diode effect in the presence of …

Tuning the Josephson diode response with an ac current

R Seoane Souto, M Leijnse, C Schrade, M Valentini… - Physical Review …, 2024 - APS
Josephson diodes are superconducting elements that show an asymmetry in the critical
current depending on the direction of the current. Here, we theoretically explore how an …

Voltage-controlled synthesis of higher harmonics in hybrid Josephson junction circuits

L Banszerus, W Marshall, CW Andersson… - Physical Review Letters, 2024 - APS
We report measurements of the current-phase relation of two voltage-controlled
semiconductor-superconductor hybrid Josephson junctions (JJs) in series. The two hybrid …

Microwave-assisted unidirectional superconductivity in Al-InAs nanowire-Al junctions under magnetic fields

H Su, JY Wang, H Gao, Y Luo, S Yan, X Wu, G Li… - Physical Review Letters, 2024 - APS
Under certain symmetry-breaking conditions, a superconducting system exhibits asymmetric
critical currents, dubbed the “superconducting diode effect.” Recently, systems with the ideal …

Strong nonlocal tuning of the current-phase relation of a quantum dot based Andreev molecule

M Kocsis, Z Scherübl, G Fülöp, P Makk, S Csonka - Physical Review B, 2024 - APS
Recent realization of minimal Kitaev chains brought a breakthrough in Majorana research,
which made arrays of quantum dots coupled by superconductor spacers the most promising …

Efficient Josephson diode effect on a two-dimensional topological insulator with asymmetric magnetization

J Wang, Y Jiang, JJ Wang, JF Liu - Physical Review B, 2024 - APS
The Josephson diode effect (JDE) is a nonreciprocal transport phenomenon in which, the
oppositely flowing critical currents are asymmetric and has great potential for applications in …

Progress in superconductor-semiconductor topological Josephson junctions

WF Schiela, P Yu, J Shabani - PRX Quantum, 2024 - APS
Majorana bound states (MBSs) are quasiparticles that are their own antiparticles. They are
predicted to emerge as zero-energy modes localized at the boundary of a topological …