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- Anne-Marie Oâ€™Connell, Max Hofheinz, +10 authors Andrew N. Cleland
- Nature
- 2010

Quantum mechanics provides a highly accurate description of a wide variety of physical systems. However, a demonstration that quantum mechanics applies equally to macroscopic mechanical systems hasâ€¦ (More)

- T. F. RÃ¸nnow, Zhihui Wang, +6 authors Matthias Troyer
- Science
- 2014

The development of small-scale quantum devices raises the question of how to fairly assess and detect quantum speedup. Here, we show how to define and measure quantum speedup and how to avoidâ€¦ (More)

- Julian Kelly, Rami Barends, +19 authors John M. Martinis
- Nature
- 2015

Quantum computing becomes viable when a quantum state can be protected from environment-induced error. If quantum bits (qubits) are sufficiently reliable, errors are sparse and quantum errorâ€¦ (More)

- Sergio Boixo, T. F. RÃ¸nnow, +5 authors Matthias Troyer
- 2013

Sergio Boixo, Troels F. RÃ¸nnow, Sergei V. Isakov, Zhihui Wang, David Wecker, Daniel A. Lidar, John M. Martinis, and Matthias Troyerâˆ—2 Information Sciences Institute and Department of Electricalâ€¦ (More)

- Rami Barends, Julian Kelly, +19 authors John M. Martinis
- Nature
- 2014

A quantum computer can solve hard problems, such as prime factoring, database searching and quantum simulation, at the cost of needing to protect fragile quantum states from error. Quantum errorâ€¦ (More)

- John M. Martinis, Ken B. Cooper, +8 authors Clare C. Yu
- Physical review letters
- 2005

Dielectric loss from two-level states is shown to be a dominant decoherence source in superconducting quantum bits. Depending on the qubit design, dielectric loss from insulating materials or theâ€¦ (More)

- Vasil S. Denchev, Sergio Boixo, +5 authors Hartmut Neven
- 2015

Quantum annealing (QA) has been proposed as a quantum enhanced optimization heuristic exploiting tunneling. Here, we demonstrate how finite range tunneling can provide considerable computationalâ€¦ (More)

Superconducting qubits are solid state electrical circuits fabricated using techniques borrowed from conventional integrated circuits. They are based on the Josephson tunnel junction, the onlyâ€¦ (More)

- John M. Martinis, S. Nam, JosÃ© Aumentado, C. Isabella Urbina
- Physical review letters
- 2002

We have designed and operated a circuit based on a large-area current-biased Josephson junction whose two lowest energy quantum levels are used to implement a solid-state qubit. The circuit allowsâ€¦ (More)

- Max Hofheinz, Hangdong Wang, +8 authors Andrew N. Cleland
- Nature
- 2009

The superposition principle is a fundamental tenet of quantum mechanics. It allows a quantum system to be â€˜in two places at the same timeâ€™, because the quantum state of a physical system canâ€¦ (More)