Search Results - "Kopas, Cameron"

Advances in Rare‐Earth Tritelluride Quantum Materials: Structure, Properties, and Synthesis by Yumigeta, Kentaro, Qin, Ying, Li, Han, Blei, Mark, Attarde, Yashika, Kopas, Cameron, Tongay, Sefaattin

“…A distinct class of 2D layered quantum materials with the chemical formula of RTe3 (R = lanthanide) has gained significant attention owing to the occurrence of…”
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Structure and Formation Mechanisms in Tantalum and Niobium Oxides in Superconducting Quantum Circuits by Oh, Jin-Su, Zaman, Rahim, Murthy, Akshay A., Bal, Mustafa, Crisa, Francesco, Zhu, Shaojiang, Torres-Castanedo, Carlos G., Kopas, Cameron J., Mutus, Joshua Y., Jing, Dapeng, Zasadzinski, John, Grassellino, Anna, Romanenko, Alex, Hersam, Mark C., Bedzyk, Michael J., Kramer, Matt, Zhou, Bi-Cheng, Zhou, Lin

“…Improving the qubit’s lifetime (T1) is crucial for fault-tolerant quantum computing. Recent advancements have shown that replacing niobium (Nb) with tantalum…”
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Characterization of Nb films for superconducting qubits using phase boundary measurements by Ryan, Kevin M., Torres-Castanedo, Carlos G., Goronzy, Dominic P., Wetten, David A. Garcia, Field, Mark, Kopas, Cameron J., Marshall, Jayss, Reagor, Matthew J., Bedzyk, Michael J., Hersam, Mark C., Chandrasekhar, Venkat

“…Continued advances in superconducting qubit performance require more detailed understandings of the many sources of decoherence. Within these devices,…”
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Formation and Microwave Losses of Hydrides in Superconducting Niobium Thin Films Resulting from Fluoride Chemical Processing by Torres‐Castanedo, Carlos G., Goronzy, Dominic P., Pham, Thang, McFadden, Anthony, Materise, Nicholas, Masih Das, Paul, Cheng, Matthew, Lebedev, Dmitry, Ribet, Stephanie M., Walker, Mitchell J., Garcia‐Wetten, David A., Kopas, Cameron J., Marshall, Jayss, Lachman, Ella, Zhelev, Nikolay, Sauls, James A., Mutus, Joshua Y., McRae, Corey Rae H., Dravid, Vinayak P., Bedzyk, Michael J., Hersam, Mark C.

“…Superconducting niobium (Nb) thin films have recently attracted significant attention due to their utility for quantum information technologies. In the…”
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Contactless excitation of acoustic resonance in insulating wafers by Zhai, Gan, Xin, Yizhou, Kopas, Cameron J., Lachman, Ella, Field, Mark, Mutus, Josh Y., Cicak, Katarina, Aumentado, José, Sung, Zuhawn, Halperin, W. P.

“…Contactless excitation and detection of high harmonic acoustic overtones in a thin insulator single crystal are described using radio frequency spectroscopy…”
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Quasiparticle spectroscopy in technologically relevant niobium using London penetration depth measurements: experiment and theory by Ghimire, Sunil, Joshi, Kamal R, Datta, Amlan, Goerdt, Aidan, Tanatar, Makariy A, Schlagel, Deborah, Kramer, Matthew J, Marshall, Jayss, Kopas, Cameron J, Mutus, Joshua Y, Romanenko, Alexander, Grassellino, Anna, Prozorov, Ruslan

“…Abstract The London penetration depth, λ ( T ) , was measured in various forms of niobium, including foils, thin films, single crystals, and samples from…”
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Low microwave loss in deposited Si and Ge thin-film dielectrics at single-photon power and low temperatures by Kopas, Cameron J., Gonzales, Justin, Zhang, Shengke, Queen, D. R., Wagner, Brian, Robinson, McDonald, Huffman, James, Newman, Nathan

“…In this study, we show that deposited Ge and Si dielectric thin-films can exhibit low microwave losses at single-photon powers and sub-Kelvin temperatures (≈40…”
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Alternating-bias assisted annealing of amorphous oxide tunnel junctions by Pappas, David P., Field, Mark, Kopas, Cameron J., Howard, Joel A., Wang, Xiqiao, Lachman, Ella, Oh, Jinsu, Zhou, Lin, Gold, Alysson, Stiehl, Gregory M., Yadavalli, Kameshwar, Sete, Eyob A., Bestwick, Andrew, Kramer, Matthew J., Mutus, Josh Y.

“…Superconducting quantum bits (qubits) rely on ultra-thin, amorphous oxide tunneling barriers that can have significant inhomogeneities and defects as grown…”
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Visualizing heterogeneous dipole fields by terahertz light coupling in individual nano-junctions by Kim, Richard H. J., Park, Joong M., Haeuser, Samuel, Huang, Chuankun, Cheng, Di, Koschny, Thomas, Oh, Jinsu, Kopas, Cameron, Cansizoglu, Hilal, Yadavalli, Kameshwar, Mutus, Josh, Zhou, Lin, Luo, Liang, Kramer, Matthew J., Wang, Jigang

“…The challenge underlying superconducting quantum computing is to remove materials bottleneck for highly coherent quantum devices. The nonuniformity and complex…”
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Systematic improvements in transmon qubit coherence enabled by niobium surface encapsulation by Bal, Mustafa, Murthy, Akshay A., Zhu, Shaojiang, Crisa, Francesco, You, Xinyuan, Huang, Ziwen, Roy, Tanay, Lee, Jaeyel, Zanten, David van, Pilipenko, Roman, Nekrashevich, Ivan, Lunin, Andrei, Bafia, Daniel, Krasnikova, Yulia, Kopas, Cameron J., Lachman, Ella O., Miller, Duncan, Mutus, Josh Y., Reagor, Matthew J., Cansizoglu, Hilal, Marshall, Jayss, Pappas, David P., Vu, Kim, Yadavalli, Kameshwar, Oh, Jin-Su, Zhou, Lin, Kramer, Matthew J., Lecocq, Florent, Goronzy, Dominic P., Torres-Castanedo, Carlos G., Pritchard, P. Graham, Dravid, Vinayak P., Rondinelli, James M., Bedzyk, Michael J., Hersam, Mark C., Zasadzinski, John, Koch, Jens, Sauls, James A., Romanenko, Alexander, Grassellino, Anna

“…We present a transmon qubit fabrication technique that yields systematic improvements in T 1 relaxation times. We encapsulate the surface of niobium and…”
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Enhanced superconducting qubit performance through ammonium fluoride etch by Kopas, Cameron J, Goronzy, Dominic P, Pham, Thang, Torres Castanedo, Carlos G, Cheng, Matthew, Cochrane, Rory, Nast, Patrick, Lachman, Ella, Zhelev, Nikolay Z, Vallières, André, Murthy, Akshay A, Oh, Jin-su, Zhou, Lin, Kramer, Matthew J, Cansizoglu, Hilal, Bedzyk, Michael J, Dravid, Vinayak P, Romanenko, Alexander, Grassellino, Anna, Mutus, Josh Y, Hersam, Mark C, Yadavalli, Kameshwar

“…Abstract The performance of superconducting qubits is often limited by dissipation and two-level systems (TLS) losses. The dominant sources of these losses are…”
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In-situ electron paramagnetic resonance studies of paramagnetic point defects in superconducting microwave resonators by Zhang, Shengke, Kopas, Cameron, Wagner, Brian, Queen, Daniel, Newman, N.

“…The physical nature and concentration of paramagnetic point defects in the dielectrics of superconducting planar microwave resonators have been determined…”
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Developing a Chemical and Structural Understanding of the Surface Oxide in a Niobium Superconducting Qubit by Murthy, Akshay A., Masih Das, Paul, Ribet, Stephanie M., Kopas, Cameron, Lee, Jaeyel, Reagor, Matthew J., Zhou, Lin, Kramer, Matthew J., Hersam, Mark C., Checchin, Mattia, Grassellino, Anna, Reis, Roberto dos, Dravid, Vinayak P., Romanenko, Alexander

“…Superconducting thin films of niobium have been extensively employed in transmon qubit architectures. Although these architectures have demonstrated…”
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Exploring the relationship between deposition method, microstructure, and performance of Nb/Si-based superconducting coplanar waveguide resonators by Oh, Jin-Su, Kopas, Cameron J., Marshall, Jayss, Fang, Xiaotian, Joshi, Kamal R., Datta, Amlan, Ghimire, Sunil, Park, Joong-Mok, Kim, Richard, Setiawan, Daniel, Lachman, Ella, Mutus, Joshua Y., Murthy, Akshay A., Grassellino, Anna, Romanenko, Alex, Zasadzinski, John, Wang, Jigang, Prozorov, Ruslan, Yadavalli, Kameshwar, Kramer, Matt, Zhou, Lin

“…Superconducting quantum circuits (SQC) are one of the most promising hardware platforms for quantum computing, yet their performance is currently limited by…”
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Characterization of Nb films for superconducting qubits using phase boundary measurements by Ryan, Kevin M., Torres-Castanedo, Carlos G., Goronzy, Dominic P., Wetten, David A. Garcia, Field, Mark, Kopas, Cameron J., Marshall, Jayss, Reagor, Matthew J., Bedzyk, Michael J., Hersam, Mark C., Chandrasekhar, Venkat

“…Continued advances in superconducting qubit performance require more detailed understandings of the many sources of decoherence. Within these devices,…”
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Exploring the relationship between deposition method, microstructure, and performance of Nb/Si-based superconducting coplanar waveguide resonators by Oh, Jin-Su, Kopas, Cameron J., Marshall, Jayss, Fang, Xiaotian, Joshi, Kamal R., Datta, Amlan, Ghimire, Sunil, Park, Joong-Mok, Kim, Richard, Setiawan, Daniel, Lachman, Ella, Mutus, Joshua Y., Murthy, Akshay A., Grassellino, Anna, Romanenko, Alex, Zasadzinski, John, Wang, Jigang, Prozorov, Ruslan, Yadavalli, Kameshwar, Kramer, Matt, Zhou, Lin

“…Superconducting quantum circuits (SQC) are one of the most promising hardware platforms for quantum computing, yet their performance is currently limited by…”
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In-situ transmission electron microscopy investigation on surface oxides thermal stability of niobium by Oh, Jin-Su, Fang, Xiaotian, Kim, Tae-Hoon, Lynn, Matt, Kramer, Matt, Zarea, Mehdi, Sauls, James A., Romanenko, Alexander, Posen, Sam, Grassellino, Anna, Kopas, Cameron J., Field, Mark, Marshall, Jayss, Cansizoglu, Hilal, Yadavalli, Kameshwar, Mutus, Joshua Y., Reagor, Matthew, Zhou, Lin

“…Niobium is commonly used for superconducting quantum systems as readout resonators, capacitors, and interconnects. Structural defects at the Nb/Si and air/Nb…”
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In-situ transmission electron microscopy investigation on surface oxides thermal stability of niobium by Oh, Jin-Su, Fang, Xiaotian, Kim, Tae-Hoon, Lynn, Matt, Kramer, Matt, Zarea, Mehdi, Sauls, James A., Romanenko, Alexander, Posen, Sam, Grassellino, Anna, Kopas, Cameron J., Field, Mark, Marshall, Jayss, Cansizoglu, Hilal, Yadavalli, Kameshwar, Mutus, Joshua Y., Reagor, Matthew, Zhou, Lin

“…[Display omitted] •All Nb films deposited on Si exhibit columnar growth with strong [110] textures.•The amorphous surface NbOx layer is dominated by Nb2O5 with…”
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Synthesis, Characterization, and Optimization of Superconductor-dielectric Interfaces by Kopas, Cameron

“…The chemical, structural, and electrical properties of niobium-silicon, niobium-germanium, and YBCO-dielectric interfaces are characterized. Reduction in the…”
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Magnetic properties of chromium-doped Ni80Fe20 thin films by Devonport, Alex, Vishina, Alena, Singh, R.K., Edwards, Matthew, Zheng, Kaiwen, Domenico, John, Rizzo, N.D., Kopas, Cameron, van Schilfgaarde, Mark, Newman, N.

“…This paper investigates the properties of thin films of chromium-doped Ni80Fe20 (Permalloy) that could potentially be useful in future low-power magnetic…”
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