Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Murthy, Akshay A."'
Autor:
Zhu, Shaojiang, You, Xinyuan, Alyanak, Ugur, Bal, Mustafa, Crisa, Francesco, Garattoni, Sabrina, Lunin, Andrei, Pilipenko, Roman, Murthy, Akshay, Romanenko, Alexander, Grassellino, Anna
Temporal fluctuations in the superconducting qubit lifetime, $T_1$, bring up additional challenges in building a fault-tolerant quantum computer. While the exact mechanisms remain unclear, $T_1$ fluctuations are generally attributed to the strong cou
Externí odkaz:
http://arxiv.org/abs/2409.09926
Autor:
Kopas, Cameron J., Goronzy, Dominic P., Pham, Thang, Castanedo, Carlos G. Torres, Cheng, Matthew, Cochrane, Rory, Nast, Patrick, Lachman, Ella, Zhelev, Nikolay Z., Vallieres, Andre, 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
The performance of superconducting qubits is often limited by dissipation and two-level systems (TLS) losses. The dominant sources of these losses are believed to originate from amorphous materials and defects at interfaces and surfaces, likely as a
Externí odkaz:
http://arxiv.org/abs/2408.02863
Autor:
Sung, Zu Hawn, Cano, Arely, Murthy, Akshay, Karapetrova, Evguenia, Lee, Jaeyel, Martinello, Martina, Grassellino, Anna, Romanenko, Alexander
Superconducting niobium serves as a key enabling material for superconducting radio frequency (SRF) technology as well as quantum computing devices. At room temperature, hydrogen commonly occupies tetragonal sites in the Nb lattice as metal (M)-gas (
Externí odkaz:
http://arxiv.org/abs/2305.01022
Autor:
Bal, Mustafa, Murthy, Akshay A., Zhu, Shaojiang, Crisa, Francesco, You, Xinyuan, Huang, Ziwen, Roy, Tanay, Lee, Jaeyel, van Zanten, David, 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 Q., Goronzy, Dominic P., Torres-Castanedo, Carlos G., Pritchard, Graham, Dravid, Vinayak P., Rondinelli, James M., Bedzyk, Michael J., Hersam, Mark C., Zasadzinski, John, Koch, Jens, Sauls, James A., Romanenko, Alexander, Grassellino, Anna
Publikováno v:
npj Quantum Inf 10, 43 (2024)
We present a novel transmon qubit fabrication technique that yields systematic improvements in T$_1$ relaxation times. We fabricate devices using an encapsulation strategy that involves passivating the surface of niobium and thereby preventing the fo
Externí odkaz:
http://arxiv.org/abs/2304.13257
We report the observation of omega phase formation in Nb thin films deposited by high-power impulse magnetron sputtering (HiPIMS) for superconducting qubits using transmission electron microscopy (TEM). We hypothesize that this phase transformation t
Externí odkaz:
http://arxiv.org/abs/2207.12495
Autor:
Alam, M. Sohaib, Belomestnykh, Sergey, Bornman, Nicholas, Cancelo, Gustavo, Chao, Yu-Chiu, Checchin, Mattia, Dinh, Vinh San, Grassellino, Anna, Gustafson, Erik J., Harnik, Roni, McRae, Corey Rae Harrington, Huang, Ziwen, Kapoor, Keshav, Kim, Taeyoon, Kowalkowski, James B., Kramer, Matthew J., Krasnikova, Yulia, Kumar, Prem, Kurkcuoglu, Doga Murat, Lamm, Henry, Lyon, Adam L., Milathianaki, Despina, Murthy, Akshay, Mutus, Josh, Nekrashevich, Ivan, Oh, JinSu, Özgüler, A. Barış, Perdue, Gabriel Nathan, Reagor, Matthew, Romanenko, Alexander, Sauls, James A., Stefanazzi, Leandro, Tubman, Norm M., Venturelli, Davide, Wang, Changqing, You, Xinyuan, van Zanten, David M. T., Zhou, Lin, Zhu, Shaojiang, Zorzetti, Silvia
Quantum information science harnesses the principles of quantum mechanics to realize computational algorithms with complexities vastly intractable by current computer platforms. Typical applications range from quantum chemistry to optimization proble
Externí odkaz:
http://arxiv.org/abs/2204.08605
Autor:
Murthy, Akshay A., Das, Paul Masih, 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 remarkable improvements in recent years, further improvements in performance through materials engine
Externí odkaz:
http://arxiv.org/abs/2203.08710
Autor:
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
Publikováno v:
In Acta Materialia 1 September 2024 276
Autor:
Murthy, Akshay A., Lee, Jae-Yel, Kopas, Cameron, Reagor, Matthew J., McFadden, Anthony P., Pappas, David P., Checchin, Mattia, Grassellino, Anna, Romanenko, Alexander
Superconducting qubits have emerged as a potentially foundational platform technology for addressing complex computational problems deemed intractable with classical computing. Despite recent advances enabling multiqubit designs that exhibit coherenc
Externí odkaz:
http://arxiv.org/abs/2108.13539
We identify a major source of quantum decoherence in three-dimensional superconducting radio-frequency (SRF) resonators and two-dimensional transmon qubits composed of oxidized niobium: oxygen vacancies in the niobium pentoxide which drive two-level
Externí odkaz:
http://arxiv.org/abs/2108.13352