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  • Institute for Quantum Computing

    Carbon Nanotube Monolayer Josephson Junction Superconducting Qubit

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    carbon nanotubes computation electrical & computer engineering qubits seed fund superconductor

    Summary

     

    The superconducting quantum computing architecture has seen rapid improvements over the last two decades. However, the coherence time of superconducting qubits is limited by unknown noise sources presumably existent at the interface between the insulator and the superconducting film. Carbon nanotubes (CNTs) are a promising material for use in Josephson-Junctions (JJs) given their unique properties, such as high electrical conductivity, pristine surface, inherent nanoscale dimension, and silicon-compatible processing. In this project, we are building gate-controlled JJs composed of CNT thin films (down-to-monolayer) positioned between two superconducting electrodes to act as a promising superconducting qubit for quantum computers. Aside from gate-controllability, this approach offers superb interface engineering capability, small integration footprint, and high-temperature operation. We expect the CNT film – JJ superconducting qubit will achieve superior performance relative to current state-of-the-art JJs and enable the development of scalable superconducting computation with extensions to arrays of CNT-JJs coupled to microwave and optical photon-waveguides.

    Figure 1. Cooper pairs interacting with gate-controlled Jospehson-Junctions composed of CNT thin films

     

    Principal Investigator (PI) or Team Coordinator

    Na Young Kim

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    Novel Superconducting Qubits for Error-Corrected Processors

    Summary In this project, we develop novel superconducting qubits for error-corrected processors to enable large-scale quantum computing. Our design efforts will specifically target error-corrected architectures through a variety of paths. Possible features will include built-in parity measurements and the use of bosonic codes, such as Fock state and Cat codes, as our starting focus. Early […]

    June 26, 2019

    PI: Christopher Wilson, Joseph Emerson, Matteo Mariantoni, David Cory

    Skip Tags computation error correction + 7 Additional

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    • Go to Novel Superconducting Qubits for Error-Corrected Processors
    Repurposing potential drug candidates for the treatment of COVID-19

    Repurposing potential drug candidates for the treatment of COVID-19

    Summary The main protease (Mpro) in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus responsible for the coronavirus disease (COVID-19), has emerged as a promising drug target. The scientific community has produced a large number of crystallographic structures of the protease, which mediates viral replication and transcription. These structures report several fragments with varied chemotypes […]

    May 6, 2020

    PI: Subha Kalyaanamoorthy

    Skip Tags biology chemistry + 11 Additional

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    • Go to Repurposing potential drug candidates for the treatment of COVID-19

    Implementing High-fidelity Quantum Gates in Multi-level Trapped Ions

    Summary   The scalability of quantum processors is limited by current error rates for single-qubit gates. By encoding more than a single bit of information within a single ion, multi-level “qudits” offer a promising method of increasing the information density within a quantum processor, and therefore minimizing the number of gates and associated error rates. […]

    July 30, 2018

    PI: Crystal Senko

    Skip Tags benchmarking computation + 7 Additional

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    • Go to Implementing High-fidelity Quantum Gates in Multi-level Trapped Ions
    Plasmon Control of Quantum States in Semiconductor Nanocrystals

    Plasmon Control of Quantum States in Semiconductor Nanocrystals

    Summary   Thanks to the light-induced collective oscillations of free charges at the boundary between a conducting material and a dielectric, known as surface plasmon resonance, metallic nanostructures can exhibit strong light absorption and scattering. The sensitivity of these resonances to the local environment and shape of the metallic structures allows them to be used, […]

    March 21, 2018

    PI: Pavle Radovanovic

    Skip Tags chemistry imaging + 4 Additional

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    • Go to Plasmon Control of Quantum States in Semiconductor Nanocrystals

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