Quantum communication protocols as a benchmark for quantum computers

Abstract

We point out that realization of quantum communication protocols in programmable quantum computers provides a deep benchmark for capabilities of real quantum hardware. Particularly, it is prospective to focus on measurements of entropy-based characteristics of the performance and to explore whether a "quantum regime" is preserved. We perform proof-of-principle implementations of superdense coding and quantum key distribution BB84 using 5- and 16-qubit superconducting quantum processors of IBM Quantum Experience. We focus on the ability of these quantum machines to provide an efficient transfer of information between distant parts of the processors by placing Alice and Bob at different qubits of the devices. We also examine the ability of quantum devices to serve as quantum memory and to store entangled states used in quantum communication. Another issue we address is an error mitigation. Although it is at odds with benchmarking, this problem is nevertheless of importance in a general context of quantum computation with noisy quantum devices. We perform such a mitigation and noticeably improve some results.

arXiv comment25 pages

References in corpus (31)

• Quantum Cryptography
• The Security of Practical Quantum Key Distribution
• Hardware-efficient Variational Quantum Eigensolver for Small Molecules and Quantum Magnets
• Theoretical efficient high capacity Quantum Key Distribution Scheme
• Error mitigation for short-depth quantum circuits
• Ground-to-satellite quantum teleportation
• State preservation by repetitive error detection in a superconducting quantum circuit
• Robust randomized benchmarking of quantum processes
• Quantum Secure Direct Communication with Quantum Memory
• Quantum optimization using variational algorithms on near-term quantum devices
• Tight Finite-Key Analysis for Quantum Cryptography
• Building logical qubits in a superconducting quantum computing system
• Provably Secure and Practical Quantum Key Distribution over 307 km of Optical Fibre
• Hybrid Quantum-Classical Hierarchy for Mitigation of Decoherence and Determination of Excited States
• Detecting arbitrary quantum errors via stabilizer measurements on a sublattice of the surface code
• Digitized adiabatic quantum computing with a superconducting circuit
• Cloud Quantum Computing of an Atomic Nucleus
• Digital quantum simulation of fermionic models with a superconducting circuit
• Demonstration of Universal Parametric Entangling Gates on a Multi-Qubit Lattice
• Detecting bit-flip errors in a logical qubit using stabilizer measurements
• Experimentally simulating the dynamics of quantum light and matter at ultrastrong coupling
• Long-distance quantum key distribution secure against coherent attacks
• Demonstration of quantum advantage in machine learning
• Performing Quantum Computing Experiments in the Cloud
• What randomized benchmarking actually measures
• Benchmarking gate-based quantum computers
• Symmetric blind information reconciliation for quantum key distribution
• Algorithmic simulation of far-from-equilibrium dynamics using quantum computer
• Automated Error Correction in IBM Quantum Computer and Explicit Generalization
• Demonstration of a quantum key distribution network in urban fibre-optic communication lines
• Test one to test many: a unified approach to quantum benchmarks

Cited by in corpus (6)

• Comprehensive characterization of three-qubit Grover search algorithm on IBM's 127-qubit superconducting quantum computers
• Design of a Quantum-Repeater using Quantum-Circuits and benchmarking its performance on an IBM Quantum-Computer
• Quantum error reduction with deep neural network applied at the post-processing stage
• Probing Quantum Telecloning on Superconducting Quantum Processors
• Nondestructive classification of quantum states using an algorithmic quantum computer
• Quantum error mitigation in the regime of high noise using deep neural network: Trotterized dynamics