Related papers: Gate-tunable Superconductivity in Hybrid InSb-Pb Nanowires

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Genuine Tripartite Strong Coupling in a Superconducting-Spin Hybrid Quantum System [14.82990573359188]
Solid-state hybrid quantum system comprises a superconducting transmon qubit, a fixed-frequency coplanar-waveguide resonator, and an ensemble of NV$-$ centers in diamond.<n> Frequency-domain spectroscopy reveals a characteristic three-mode avoided crossing, indicating that single excitations are coherently shared across all three subsystems.
arXiv Detail & Related papers (2025-12-15T09:40:17Z)
An InAsSb surface quantum well with in-situ deposited Nb as a platform for semiconductor-superconductor hybrid devices [0.0]
We present a novel semiconductor-superconductor hybrid material based on a molecular beam epitaxially grown InAsSb surface quantum well with an in-situ deposited Nb top layer.<n>The in-situ deposition of the Nb results in a high-quality interface that enables strong coupling to the InAsSb quantum well.<n>The large induced superconducting gap combined with strong spin-orbit interaction position this material as an attractive platform for experiments exploring gate-tunable superconductivity and topological superconducting devices.
arXiv Detail & Related papers (2025-10-01T09:42:21Z)
Enhanced and modulable induced superconducting gap and effective Landé g-factor in Pb-InSb hybrid devices [19.425902886527076]
We show lead (Pb)-based hybrid quantum devices exhibit a remarkably large and hard proximity-induced superconducting gap.<n>These findings underscore the superior functionality of Pb-based hybrid systems.
arXiv Detail & Related papers (2025-06-04T04:27:57Z)
Donor-Acceptor Pairs near Silicon Carbide surfaces [41.94295877935867]
Donor-acceptor pairs (DAPs) in wide-bandgap semiconductors are promising platforms for the realization of quantum technologies.<n>We show how the presence of surfaces influence the stability and optical properties of Al-N DAPs in SiC.<n>We introduce the concept of surface-defect pairs (SDPs), where an electron-hole pair is generated between a near-surface defect and an occupied surface state.
arXiv Detail & Related papers (2025-04-14T17:58:59Z)
Crystalline superconductor-semiconductor Josephson junctions for compact superconducting qubits [0.5843717940587849]
We study vertically stacked van der Waals Josephson junctions with semiconducting weak links, whose crystalline structures and clean interfaces offer a promising platform for quantum devices. We fabricate a prototype all-crystalline merged-element transmon qubit with transmon frequency and anharmonicity closely matching design parameters. We demonstrate dispersive coupling between this transmon and a microwave resonator, highlighting the potential of crystalline superconductor-semiconductor structures for compact, tailored superconducting quantum devices.
arXiv Detail & Related papers (2025-01-24T23:08:13Z)
Transport properties and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures [44.99833362998488]
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arXiv Detail & Related papers (2024-10-18T22:25:50Z)
InAs on Insulator: A New Platform for Cryogenic Hybrid Superconducting Electronics [37.69303106863453]
Superconducting circuits based on hybrid InAs Josephson Junctions (JJs) play a starring role in the design of fast and ultra-low power consumption solid-state quantum electronics.<n>We propose the InAs-on-insulator (InAsOI) as a groundbreaking platform for developing superconducting electronics.
arXiv Detail & Related papers (2024-05-13T10:39:16Z)
Strongly Coupled Spins of Silicon-Vacancy Centers Inside a Nanodiamond with Sub-Megahertz Linewidth [43.06643088952006]
electron spin of a color center in diamond mediates interaction between a long-lived nuclear spin and a photon. We demonstrate strong coupling of its electron spin, while the electron spin's decoherence rate remained below 1 MHz. We furthermore demonstrate multi-spin coupling with the potential to establish registers of quantum memories in nanodiamonds.
arXiv Detail & Related papers (2023-12-14T14:17:35Z)
Strong tunable coupling between two distant superconducting spin qubits [3.2422448552678254]
Superconducting (or Andreev) spin qubits have emerged as an alternative qubit platform. In this work, we demonstrate a strong supercurrent-mediated coupling between two distant Andreev spin qubits.
arXiv Detail & Related papers (2023-07-28T16:30:48Z)
Fragmented superconductivity in the Hubbard model as solitons in Ginzburg-Landau theory [39.58317527488534]
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arXiv Detail & Related papers (2023-07-21T18:00:07Z)
Large-scale on-chip integration of gate-voltage addressable hybrid superconductor-semiconductor quantum wells field effect nano-switch arrays [4.956039994321721]
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arXiv Detail & Related papers (2023-07-10T05:44:43Z)
High-fidelity two-qubit gates of hybrid superconducting-semiconducting singlet-triplet qubits [0.0]
Superconductors induce long-range interactions between the spin degrees of freedom of quantum dots. We show that this anisotropy is tunable and enables fast and high-fidelity two-qubit gates between singlet-triplet (ST) spin qubits. Our design is immune to leakage of the quantum information into noncomputational states.
arXiv Detail & Related papers (2023-04-11T09:30:38Z)
Epitaxially Driven Phase Selectivity of Sn in Hybrid Quantum Nanowires [2.760801096299724]
Hybrid semiconductor/superconductor nanowires constitute a pervasive platform for studying gate-tunable superconductivity. We present an extensive optimization of Sn growth on InSb, InAsSb and InAs nanowires.
arXiv Detail & Related papers (2022-12-26T22:43:22Z)
TOF-SIMS Analysis of Decoherence Sources in Nb Superconducting Resonators [48.7576911714538]
Superconducting qubits have emerged as a potentially foundational platform technology. Material quality and interfacial structures continue to curb device performance. Two-level system defects in the thin film and adjacent regions introduce noise and dissipate electromagnetic energy.
arXiv Detail & Related papers (2021-08-30T22:22:47Z)
Epitaxial Superconductor-Semiconductor Two-Dimensional Systems for Superconducting Quantum Circuits [0.0]
Materials innovation and design breakthroughs have increased functionality and coherence of qubits substantially over the past two decades. We show by improving interface between InAs as a semiconductor and Al as a superconductor, one can reliably fabricate voltage-controlled Josephson junction field effect transistor (JJ-FET) We present the anharmonicity and coupling strengths from one and two-photon absorption in a quantum two level system fabricated with a JJ-FET.
arXiv Detail & Related papers (2021-03-26T19:09:59Z)
Quantum Sensors for Microscopic Tunneling Systems [58.720142291102135]
tunneling Two-Level-Systems (TLS) are important for micro-fabricated quantum devices such as superconducting qubits. We present a method to characterize individual TLS in virtually arbitrary materials deposited as thin-films. Our approach opens avenues for quantum material spectroscopy to investigate the structure of tunneling defects.
arXiv Detail & Related papers (2020-11-29T09:57:50Z)
Tunable quantum photonics platform based on fiber-cavity enhanced single photon emission from two-dimensional hBN [52.915502553459724]
In this work we present a hybrid system consisting of defect centers in few-layer hBN grown by chemical vapor deposition and a fiber-based Fabry-Perot cavity. We achieve very large cavity-assisted signal enhancement up to 50-fold and equally strong linewidth narrowing owing to cavity funneling. Our work marks an important milestone for the deployment of 2D materials coupled to fiber-based cavities in practical quantum technologies.
arXiv Detail & Related papers (2020-06-23T14:20:46Z)
Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control. We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap. The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
arXiv Detail & Related papers (2020-06-05T09:27:53Z)

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