Leakage-resilient approach to fault-tolerant quantum computing with superconducting elements

Leakage-resilient approach to fault-tolerant quantum computing with superconducting elements

Joydip Ghosh1,* and Austin G. Fowler2,3,† 1Institute for Quantum Science and Technology, University of Calgary, Calgary, Alberta T2N 1N4, Canada 2Department of Physics, University of California, Santa Barbara, California 93106, USA 3Centre for Quantum Computation and Communication Technology, School of Physics, The University of Melbourne, Victoria 3010, Australia (Received 26 May 2014; publish...

Fault-tolerant quantum computing with color codes

We have just completed a thorough, multi-year study of fault-tolerant quantum computation with color codes. These codes are amazing—one way to think about them is as a family of codes which generalize the Steane code not by concatenation but by lattice embedding [1]. Our study of fault-tolerant computing with these codes is complete with analytic bounds, numerical simulations, multiple noise mo...

Fault-Tolerant Computing With Biased-Noise Superconducting Qubits

We present a universal scheme of pulsed operations for the IBM oscillator-stabilized flux qubit comprising the controlled-σz (cphase) gate, single-qubit preparations and measurements. Based on numerical simulations, we argue that the error rates for these operations can be as low as about .5% and that noise is highly biased, with phase errors being stronger than all other types of errors by a f...

Resource optimization for fault-tolerant quantum computing

Quantum computing offers the potential for efficiently solving otherwise classically difficult problems, with applications in material and drug design, cryptography, theoretical physics, number theory and more. However, quantum systems are notoriously fragile; interaction with the surrounding environment and lack of precise control constitute noise, which makes construction of a reliable quantu...

On Universal and Fault-Tolerant Quantum Computing