Quantum transport and localization in 1d and 2d tight-binding lattices

Autor: Amir H. Karamlou, Jochen Braumüller, Yariv Yanay, Agustin Di Paolo, Patrick M. Harrington, Bharath Kannan, David Kim, Morten Kjaergaard, Alexander Melville, Sarah Muschinske, Bethany M. Niedzielski, Antti Vepsäläinen, Roni Winik, Jonilyn L. Yoder, Mollie Schwartz, Charles Tahan, Terry P. Orlando, Simon Gustavsson, William D. Oliver

Publikováno v: npj Quantum Information, Vol 8, Iss 1, Pp 1-8 (2022)

Abstract Particle transport and localization phenomena in condensed-matter systems can be modeled using a tight-binding lattice Hamiltonian. The ideal experimental emulation of such a model utilizes simultaneous, high-fidelity control and readout of

Externí odkaz: https://doaj.org/article/6d5620e008104427a774c83732d77e6a

Multi-level quantum noise spectroscopy

Autor: Youngkyu Sung, Antti Vepsäläinen, Jochen Braumüller, Fei Yan, Joel I-Jan Wang, Morten Kjaergaard, Roni Winik, Philip Krantz, Andreas Bengtsson, Alexander J. Melville, Bethany M. Niedzielski, Mollie E. Schwartz, David K. Kim, Jonilyn L. Yoder, Terry P. Orlando, Simon Gustavsson, William D. Oliver

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)

Engineering qubits with long coherence times requires the ability to distinguish multiple noise sources, which is not possible with typical two-level qubit sensors. Here the authors utilize the multiple level transitions of a superconducting qubit to

Externí odkaz: https://doaj.org/article/fb0badbcc1874995abff41633cca96e1

Realization of High-Fidelity CZ and ZZ-Free iSWAP Gates with a Tunable Coupler

Autor: Youngkyu Sung, Leon Ding, Jochen Braumüller, Antti Vepsäläinen, Bharath Kannan, Morten Kjaergaard, Ami Greene, Gabriel O. Samach, Chris McNally, David Kim, Alexander Melville, Bethany M. Niedzielski, Mollie E. Schwartz, Jonilyn L. Yoder, Terry P. Orlando, Simon Gustavsson, William D. Oliver

Publikováno v: Physical Review X, Vol 11, Iss 2, p 021058 (2021)

High-fidelity two-qubit gates at scale are a key requirement to realize the full promise of quantum computation and simulation. The advent and use of coupler elements to tunably control two-qubit interactions has improved operational fidelity in many

Externí odkaz: https://doaj.org/article/0c7ac0af40bc48ee8c2aeff5bc7eb781

The flux qubit revisited to enhance coherence and reproducibility

Autor: Fei Yan, Simon Gustavsson, Archana Kamal, Jeffrey Birenbaum, Adam P Sears, David Hover, Ted J. Gudmundsen, Danna Rosenberg, Gabriel Samach, S Weber, Jonilyn L. Yoder, Terry P. Orlando, John Clarke, Andrew J. Kerman, William D. Oliver

Publikováno v: Nature Communications, Vol 7, Iss 1, Pp 1-9 (2016)

Scalable quantum information processing requires controllable high-coherence qubits. Here, the authors present superconducting flux qubits with broad frequency tunability, strong anharmonicity and high reproducibility, identifying photon shot noise a

Externí odkaz: https://doaj.org/article/21492228b4a148f8b8469ef4e5300504

Multi-level quantum noise spectroscopy

Autor: Fei Yan, Jochen Braumüller, Alexander Melville, Youngkyu Sung, Roni Winik, Morten Kjaergaard, Philip Krantz, Bethany Niedzielski, Terry P. Orlando, William D. Oliver, Jonilyn Yoder, Simon Gustavsson, Antti Vepsäläinen, David Kim, Joel I-Jan Wang, Mollie Schwartz, Andreas Bengtsson

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
Nature Communications
Sung, Y, Vepsalainen, A, Braumuller, J, Yan, F, Wang, J I-J, Kjaergaard, M, Winik, R, Krantz, P, Bengtsson, A, Melville, A J, Niedzielski, B M, Schwartz, M E, Kim, D K, Yoder, J L, Orlando, T P, Gustavsson, S & Oliver, W D 2021, ' Multi-level quantum noise spectroscopy ', Nature Communications, vol. 12, no. 1, 967 . https://doi.org/10.1038/s41467-021-21098-3

System noise identification is crucial to the engineering of robust quantum systems. Although existing quantum noise spectroscopy (QNS) protocols measure an aggregate amount of noise affecting a quantum system, they generally cannot distinguish betwe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1456cbe14eaeb13fd26e2e4e712ecb9d
https://doaj.org/article/fb0badbcc1874995abff41633cca96e1