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Tantalum Gets Superpower Upgrade with Tiny Magnesium Coating

Scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory have discovered that adding a layer of magnesium improves the properties of tantalum, a superconducting material that shows great promise for building qubits, the basis of quantum computers. ....

Laura Thomsonfeb , Peter Sushko , Yimei Zhu , Mingzhao Liu , Andrew Walter , Brookhaven National Laboratory , National Energy Research Scientific Computing Center , Nanostructure Group , Brookhaven National Synchrotron Light Source , Brookhaven Lab , Energy Materials Group , Office Of Science , Us Department Of Energy , Princeton University , Lawrence Berkeley National Laboratory , Stony Brook University , Pacific Northwest National Laboratory , National Institute Of Standards , Advanced Materials , Functional Nanomaterials , National Synchrotron Light Source , Condensed Matter Physics , Materials Science , Northwest National Laboratory , Co Design Center , Quantum Advantage ,

Magnesium protects tantalum, a promising material for making qubits

Magnesium protects tantalum, a promising material for making qubits
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Mingzhao Liu , Yimei Zhu , Peter Sushko , Andrew Walter , Brookhaven Lab , Pacific Northwest National Laboratory , Brookhaven Center , Princeton University , Brookhaven National Synchrotron Light Source , Functional Nanomaterials , National Synchrotron Light Source , Condensed Matter Physics , Materials Science , Northwest National Laboratory , Co Design Center , Quantum Advantage , Softx Ray Scattering ,

Could Magnesium Enhance Tantalum's Quantum Potential?

Researchers at the DOE’s Brookhaven National Laboratory in the United States have found that a coating of magnesium enhances the characteristics of tantalum, a superconducting material with a lot of potential for creating qubits, the building blocks of quantum computers. ....

United States , Peter Sushko , Junsik Mun , Yimei Zhu , Andrew Walter , Mingzhao Liu , Chenyu Zhou , Megan Craig , Brookhaven National Laboratory , Energy Materials Group , National Synchrotron Light Source , Interface Sciences Catalysis , Study Co , Jessica Rotkiewicz Brookhaven National Laboratory , Brookhaven Lab , Department At Brookhaven , Stony Brook University , Pacific Northwest National Laboratory , Nanostructure Group , Princeton University , Office Of Science , National Institute Of Standards , National Laboratory , Functional Nanomaterials , Dynacool Physical Property Measurement System , Brookhaven National ,

Direct view of tantalum oxidation that impedes qubit coherence

Direct view of tantalum oxidation that impedes qubit coherence
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Yimei Zhu , Mingzhao Liu , Herbert Kroemer , Peter Sushko , Brookhaven National Synchrotron Light Source , Lawrence Berkeley National Laboratory , Brookhaven Center , National Energy Research Scientific Computing Center , Princeton University , Office Of Science , Functional Nanomaterials , National Synchrotron Light Source , Co Design Center , Quantum Advantage , Condensed Matter Physics , Materials Science ,

Understanding the tantalizing benefits of tantalum for improved quantum processors: Scientists decode the chemical profile of tantalum surface oxides to understand loss and improve qubit performance

Researchers working to improve the performance of superconducting qubits, the foundation of quantum computers, have been experimenting using different base materials in an effort to increase the coherent lifetimes of qubits. The coherence time is a measure of how long a qubit retains quantum information, and thus a primary measure of performance. Recently, scientists discovered that using tantalum in superconducting qubits makes them perform better, but no one has been able to determine why until now. ....

Mingzhao Liu , Andrew Walter , Us Department Of Energy , Office Of Science User Facilities , Brookhaven National Laboratory , National Synchrotron Light Source , Princeton University , Functional Nanomaterials , Co Design Center , Quantum Advantage , Advanced Science , Science User Facilities , Nathalie De Leon , Spectroscopy Soft , Tender Beamlines ,