Active Readout Error Mitigation

Abstract

Mitigating errors is a significant challenge for near term quantum computers. One of the most important sources of errors is related to the readout of the quantum state into a classical bit stream. A variety of techniques have been proposed to mitigate these errors with post-hoc corrections. We propose a complementary scheme to actively reduce readout errors on a shot-by-shot basis by encoding single qubits, immediately prior to readout, into multi-qubit states. The computational resources of our technique are independent of the circuit depth and fully compatible with current hardware error rates and connectivity. We analyze the potential of our approach using two types of error-correcting codes and, as a proof of principle, demonstrate an 80% improvement in readout error on the IBMQ Mumbai quantum computer.

arXiv comment11+4 pages, 15 figures; published version with small correction to Fig. 5

References in corpus (27)

• Quantum Computing in the NISQ era and beyond
• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
• Quantum Error Correction for Quantum Memories
• Strong quantum computational advantage using a superconducting quantum processor
• State preservation by repetitive error detection in a superconducting quantum circuit
• How to factor 2048 bit RSA integers in 8 hours using 20 million noisy qubits
• Roads towards fault-tolerant universal quantum computation
• Quantum Approximate Optimization of Non-Planar Graph Problems on a Planar Superconducting Processor
• 10-qubit entanglement and parallel logic operations with a superconducting circuit
• Experimental demonstration of fault-tolerant state preparation with superconducting qubits
• Mitigation of readout noise in near-term quantum devices by classical post-processing based on detector tomography
• Genuine 12-qubit entanglement on a superconducting quantum processor
• Fault-tolerant quantum error detection
• Verifying Multipartite Entangled GHZ States via Multiple Quantum Coherences
• Detector Tomography on IBM 5-qubit Quantum Computers and Mitigation of Imperfect Measurement
• Fault-Tolerant Logical Gates in the IBM Quantum Experience
• A quantum algorithm for high energy physics simulations
• Efficient correction of multiqubit measurement errors
• A repetition code of 15 qubits
• Error detection on quantum computers improves accuracy of chemical calculations
• Protecting quantum memories using coherent parity check codes
• Readout Rebalancing for Near Term Quantum Computers
• Testing quantum fault tolerance on small systems
• Is error detection helpful on IBM 5Q chips ?
• Improving the efficiency of joint remote state preparation in noisy environment with weak measurement
• Universal bound on the cardinality of local hidden variables in networks

Cited by in corpus (7)

• Quantum Error Mitigation
• Quantum Simulation for High Energy Physics
• Near-Term Quantum Computing Techniques: Variational Quantum Algorithms, Error Mitigation, Circuit Compilation, Benchmarking and Classical Simulation
• Optimising shadow tomography with generalised measurements
• Scaling Qubit Readout with Hardware Efficient Machine Learning Architectures
• Measurement induced quantum walks on an IBM Quantum Computer
• Post-selection-free preparation of high-quality physical qubits