1. Experimental Demonstration of Fault-Tolerant State Preparation with Superconducting Qubits
- Author
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Jerry M. Chow, Antonio Corcoles, Jay M. Gambetta, Maika Takita, and Andrew W. Cross
- Subjects
FOS: Physical sciences ,General Physics and Astronomy ,Hardware_PERFORMANCEANDRELIABILITY ,01 natural sciences ,010305 fluids & plasmas ,Computer Science::Hardware Architecture ,Computer Science::Emerging Technologies ,0103 physical sciences ,Hardware_ARITHMETICANDLOGICSTRUCTURES ,010306 general physics ,Computer Science::Operating Systems ,Quantum ,Quantum computer ,Superconductivity ,Physics ,Quantum Physics ,business.industry ,Electrical engineering ,TheoryofComputation_GENERAL ,Fault tolerance ,Dissipation ,ComputerSystemsOrganization_MISCELLANEOUS ,Qubit ,Quantum Physics (quant-ph) ,business ,Superconducting quantum computing ,AND gate - Abstract
Robust quantum computation requires encoding delicate quantum information into degrees of freedom that are hard for the environment to change. Quantum encodings have been demonstrated in many physical systems by observing and correcting storage errors, but applications require not just storing information; we must accurately compute even with faulty operations. The theory of fault-tolerant quantum computing illuminates a way forward by providing a foundation and collection of techniques for limiting the spread of errors. Here we implement one of the smallest quantum codes in a five-qubit superconducting transmon device and demonstrate fault-tolerant state preparation. We characterize the resulting code words through quantum process tomography and study the free evolution of the logical observables. Our results are consistent with fault-tolerant state preparation in a protected qubit subspace.
- Published
- 2017