High-Fidelity Quantum Logic Gates Using Trapped-Ion Hyperfine Qubits

C. J. Ballance; T. P. Harty; Norbert M. Linke; M. A. Sepiol; David Lucas

doi:10.1103/physrevlett.117.060504

Abstract

We demonstrate laser-driven two-qubit and single-qubit logic gates with respective fidelities 99.9(1)% and 99.9934(3)%, significantly above the ≈99% minimum threshold level required for fault-tolerant quantum computation, using qubits stored in hyperfine ground states of calcium-43 ions held in a room-temperature trap. We study the speed-fidelity trade-off for the two-qubit gate, for gate times between 3.8 μs and 520 μs, and develop a theoretical error model which is consistent with the data and which allows us to identify the principal technical sources of infidelity.

Keywords

QubitHyperfine structureQuantum computerPhysicsHigh fidelityQuantum logicQuantum gateFidelityQuantum mechanicsLogic gateQuantum error correctionComputer scienceAtomic physicsQuantumAlgorithmTelecommunications

Affiliated Institutions

University of Oxford GB

Related Publications

Efficient networks for quantum factoring

David Beckman , Amalavoyal N. Chari , Devabhaktuni Srikrishna +1 more

We consider how to optimize memory use and computation time in operating a quantum computer. In particular, we estimate the number of memory quantum bits (qubits) and the number...

1996 Physical Review A 250 citations

Superconducting Qubits: Current State of Play

Morten Kjaergaard , Mollie E. Schwartz , Jochen Braumüller +4 more

Superconducting qubits are leading candidates in the race to build a quantum computer capable of realizing computations beyond the reach of modern supercomputers. The supercondu...

2019 Annual Review of Condensed Matter Phy... 1216 citations

Threshold Estimate for Fault Tolerant Quantum Computation

Christof Zalka

I make a rough estimate of the accuracy threshold for fault tolerant quantum computing with concatenated codes. First I consider only gate errors and use the depolarizing channe...

1996 arXiv (Cornell University) 40 citations

Quantum Computing in the NISQ era and beyond

John Preskill

Noisy Intermediate-Scale Quantum (NISQ) technology will be available in the near future. Quantum computers with 50-100 qubits may be able to perform tasks which surpass the capa...

2018 Quantum 7217 citations

A blueprint for demonstrating quantum supremacy with superconducting qubits

C. Neill , P. Roushan , Kostyantyn Kechedzhi +29 more

Scaling up to supremacy Quantum information scientists are getting closer to building a quantum computer that can perform calculations that a classical computer cannot. It has b...

2018 Science 449 citations

Publication Info

Year: 2016
Type: article
Volume: 117
Issue: 6
Pages: 060504-060504
Citations: 734
Access: Closed

External Links

View on DOI.org

Social Impact

Altmetric

High-Fidelity Quantum Logic Gates Using Trapped-Ion Hyperfine Qubits

PlumX Metrics

Social media, news, blog, policy document mentions

Citation Metrics

734

OpenAlex

Cite This

APA Style

                            
                                
                                    C. J. Ballance, 
                                
                                    T. P. Harty, 
                                
                                    Norbert M. Linke
                                
                                et al.
                            
                            (2016). 
                            High-Fidelity Quantum Logic Gates Using Trapped-Ion Hyperfine Qubits. 
                            Physical Review Letters
                            , 117
                            (6)
                            , 060504-060504.
                            https://doi.org/10.1103/physrevlett.117.060504
                        

Identifiers

DOI: 10.1103/physrevlett.117.060504