Chemical Profiles of the Oxides on Tantalum in State of the Art Superconducting Circuits.
Sign Up to like & getrecommendations! Published in 2023 at "Advanced science"
DOI: 10.1002/advs.202300921
Abstract: Over the past decades, superconducting qubits have emerged as one of the leading hardware platforms for realizing a quantum processor. Consequently, researchers have made significant effort to understand the loss channels that limit the coherence… read more here.
Keywords: oxides tantalum; state art; chemical profiles; superconducting qubits ... See more keywords
Controllable and accelerated generation of entangled states between two superconducting qubits in circuit QED
Sign Up to like & getrecommendations! Published in 2021 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2020.106699
Abstract: Abstract Optimal generation of entangled states is of significance to quantum information processing. Here an efficient scheme is proposed for performing controllable and accelerated generation of entangled states between two superconducting qubits. Two three-level artificial… read more here.
Keywords: superconducting qubits; generation entangled; controllable accelerated; entangled states ... See more keywords
Probing defect densities at the edges and inside Josephson junctions of superconducting qubits
Sign Up to like & getrecommendations! Published in 2022 at "npj Quantum Information"
DOI: 10.1038/s41534-022-00532-4
Abstract: Tunneling defects in disordered materials form spurious two-level systems which are a major source of decoherence for micro-fabricated quantum devices. For superconducting qubits, defects in tunnel barriers of submicrometer-sized Josephson junctions couple strongest to the… read more here.
Keywords: probing defect; defect densities; junction; superconducting qubits ... See more keywords
Overlap junctions for high coherence superconducting qubits
Sign Up to like & getrecommendations! Published in 2017 at "Applied Physics Letters"
DOI: 10.1063/1.4993937
Abstract: Fabrication of sub-micron Josephson junctions is demonstrated using standard processing techniques for high-coherence, superconducting qubits. These junctions are made in two separate lithography steps with normal-angle evaporation. Most significantly, this work demonstrates that it is… read more here.
Keywords: overlap junctions; coherence; superconducting qubits; coherence superconducting ... See more keywords
Experimental exploration of five-qubit quantum error correcting code with superconducting qubits
Sign Up to like & getrecommendations! Published in 2021 at "National Science Review"
DOI: 10.1093/nsr/nwab011
Abstract: Quantum error correction is an essential ingredient for universal quantum computing. Despite tremendous experimental efforts in the study of quantum error correction, to date, there has been no demonstration in the realisation of universal quantum… read more here.
Keywords: code; error; superconducting qubits; error correcting ... See more keywords
Sampling and Scrambling on a Chain of Superconducting Qubits
Sign Up to like & getrecommendations! Published in 2018 at "Physical review applied"
DOI: 10.1103/physrevapplied.10.024052
Abstract: We study a circuit, the Josephson sampler, that embeds a real vector into an entangled state of n qubits, and optionally samples from it. We measure its fidelity and entanglement on the 16-qubit ibmqx5 chip.… read more here.
Keywords: chain; chain superconducting; superconducting qubits; sampling scrambling ... See more keywords
Entanglement Generation in Superconducting Qubits Using Holonomic Operations
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review Applied"
DOI: 10.1103/physrevapplied.11.014017
Abstract: We investigate a non-adiabatic holonomic operation that enables us to entangle two fixed-frequency superconducting transmon qubits attached to a common bus resonator. Two coherent microwave tones are applied simultaneously to the two qubits and drive… read more here.
Keywords: qubits using; generation superconducting; holonomic operations; entanglement generation ... See more keywords
Baseband Control of Superconducting Qubits with Shared Microwave Drives
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review Applied"
DOI: 10.1103/physrevapplied.19.054050
Abstract: Accurate control of qubits is the central requirement for building functional quantum processors. For the current superconducting quantum processor, high-fidelity control of qubits is mainly based on independently calibrated microwave pulses, which could differ from… read more here.
Keywords: qubit; microwave drives; baseband; shared microwave ... See more keywords
High-Contrast ZZ Interaction Using Superconducting Qubits with Opposite-Sign Anharmonicity.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.125.200503
Abstract: For building a scalable quantum processor with superconducting qubits, ZZ interaction is of great concern because its residual has a crucial impact to two-qubit gate fidelity. Two-qubit gates with fidelity meeting the criterion of fault-tolerant… read more here.
Keywords: two qubit; interaction; qubit; superconducting qubits ... See more keywords
Demonstration of Tunable Three-Body Interactions between Superconducting Qubits.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.220501
Abstract: Nonpairwise multiqubit interactions present a useful resource for quantum information processors. Their implementation would facilitate more efficient quantum simulations of molecules and combinatorial optimization problems, and they could simplify error suppression and error correction schemes.… read more here.
Keywords: three body; body interactions; tunable three; superconducting qubits ... See more keywords
Experimental Simulation of Larger Quantum Circuits with Fewer Superconducting Qubits.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.130.110601
Abstract: Although near-term quantum computing devices are still limited by the quantity and quality of qubits in the so-called NISQ era, quantum computational advantage has been experimentally demonstrated. Moreover, hybrid architectures of quantum and classical computing… read more here.
Keywords: circuit; circuit cutting; linear cluster; superconducting qubits ... See more keywords