Enhanced connectivity of quantum hardware with digital-analog control
arXiv:1912.09331 · doi:10.1103/PhysRevResearch.2.033103
Abstract
Quantum computers based on superconducting circuits are experiencing a rapid development, aiming at outperforming classical computers in certain useful tasks in the near future. However, the currently available chip fabrication technologies limit the capability of gathering a large number of high-quality qubits in a single superconducting chip, a requirement for implementing quantum error correction. Furthermore, achieving high connectivity in a chip poses a formidable technological challenge. Here, we propose a hybrid digital-analog quantum algorithm that enhances the physical connectivity among qubits coupled by an arbitrary inhomogeneous nearest-neighbour Ising Hamiltonian and generates an arbitrary all-to-all Ising Hamiltonian only by employing single-qubit rotations. Additionally, we optimize the proposed algorithm in the number of analog blocks and in the time required for the simulation. These results take advantage of the natural evolution of the system by combining the flexibility of digital steps with the robustness of analog quantum computing, allowing us to improve the connectivity of the hardware and the efficiency of quantum algorithms.
References in corpus (15)
- Quantum Computing in the NISQ era and beyond
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Hardware-efficient Variational Quantum Eigensolver for Small Molecules and Quantum Magnets
- Real-time dynamics of lattice gauge theories with a few-qubit quantum computer
- Universal digital quantum simulation with trapped ions
- Quantum-Classical Computation of Schwinger Model Dynamics using Quantum Computers
- Dynamical Casimir effect entangles artificial atoms
- Universal quantum computation and simulation using any entangling Hamiltonian and local unitaries
- Quantum Simulation of the Ultrastrong Coupling Dynamics in Circuit QED
- Digital-Analog Quantum Computation
- Digital-Analog Quantum Simulations with Superconducting Circuits
- Quantum Simulator for Transport Phenomena in Fluid Flows
- Digital quantum simulation of many-body non-Markovian dynamics
- Digital-analog quantum algorithm for the quantum Fourier transform
- Quantum chemistry and charge transport in biomolecules with superconducting circuits
Cited by in corpus (16)
- Noisy intermediate-scale quantum (NISQ) algorithms
- Expressibility and trainability of parameterized analog quantum systems for machine learning applications
- Approximating the quantum approximate optimization algorithm with digital-analog interactions
- Digital-Analog Quantum Simulations Using The Cross-Resonance Effect
- Hybrid Quantum-Classical Heuristic for the Bin Packing Problem
- Mitigating noise in digital and digital-analog quantum computation
- Digital-Analog Quantum Computation with Arbitrary Two-Body Hamiltonians
- Digital-analog quantum simulation of fermionic models
- Parameterized Hamiltonian simulation using quantum optimal control
- Fully-programmable universal quantum simulator with a one-dimensional quantum processor
- Universal quantum processors in spin systems via robust local pulse sequences
- Enhancing Quantum Annealing in Digital-Analog Quantum Computing
- Benchmarking Digital-Analog Quantum Computation
- Tight bound for the total time in digital-analog quantum computation
- Simple Diagonal State Designs with Reconfigurable Real-Time Circuits
- Hamiltonian simulation with explicit formulas for Digital-Analog Quantum Computing