Long-range coupling and scalable architecture for superconducting flux qubits

Abstract

Constructing a fault-tolerant quantum computer is a daunting task. Given any design, it is possible to determine the maximum error rate of each type of component that can be tolerated while still permitting arbitrarily large-scale quantum computation. It is an underappreciated fact that including an appropriately designed mechanism enabling long-range qubit coupling or transport substantially increases the maximum tolerable error rates of all components. With this thought in mind, we take the superconducting flux qubit coupling mechanism described in PRB 70, 140501 (2004) and extend it to allow approximately 500 MHz coupling of square flux qubits, 50 um a side, at a distance of up to several mm. This mechanism is then used as the basis of two scalable architectures for flux qubits taking into account crosstalk and fault-tolerant considerations such as permitting a universal set of logical gates, parallelism, measurement and initialization, and data mobility.

8 pages, 11 figures

References in corpus (40)

• Good Quantum Error-Correcting Codes Exist
• A Quantum Adiabatic Evolution Algorithm Applied to Random Instances of an NP-Complete Problem
• Multiple Particle Interference and Quantum Error Correction
• Coherent Quantum Dynamics of a Superconducting Flux Qubit
• Quantum Computing with Very Noisy Devices
• Electron Spin Resonance Transistors for Quantum Computing in Silicon-Germanium Heterostructures
• A quantum algorithm providing exponential speed increase for finding eigenvalues and eigenvectors
• Overhead and noise threshold of fault-tolerant quantum error correction
• Dephasing of a superconducting qubit induced by photon noise
• Charge-based quantum computing using single donors in semiconductors
• Design and proof of concept for silicon-based quantum dot quantum bits
• Practical design and simulation of silicon-based quantum dot qubits
• Simulating lattice gauge theories on a quantum computer
• Scalable quantum computing with Josephson charge qubits
• Controllable coupling of superconducting flux qubits
• Dephasing of a superconducting flux qubit
• Controllable coupling between flux qubits
• Effective fault-tolerant quantum computation with slow measurements
• Semiconductor-based Geometrical Quantum Gates
• Simulating quantum mechanics on a quantum computer
• Tunable coupling scheme for flux qubits at the optimal point
• Entangling flux qubits with a bipolar dynamic inductance
• Higher Order Methods for Simulations on Quantum Computers
• Switchable resonant coupling of flux qubits
• Quantum Sub-Gaussian Mean Estimator
• Fast quantum algorithms for numerical integrals and stochastic processes
• Threshold Error Penalty for Fault Tolerant Computation with Nearest Neighbour Communication
• Possible implementation of adiabatic quantum algorithm with superconducting flux qubits
• Eigenvector Approximation Leading to Exponential Speedup of Quantum Eigenvalue Calculation
• Quantum Computing with Atomic Josephson Junction Arrays
• Simulation of many-qubit quantum computation with matrix product states
• Spectroscopy of three strongly coupled flux qubits
• Tunable coupling of qubits: nonadiabatic corrections
• Phase-space theory for dispersive detectors of superconducting qubits
• Quantum Computer Using Coupled Quantum Dot Molecules
• Eigenvalue Estimation of Differential Operators
• Quantum Computation of Jones' Polynomials
• Nuclear spin qubits in a pseudo-spin quantum chain
• Acceptor-based silicon quantum computing
• Quantum algorithms for a set of group theoretic problems

Cited by in corpus (23)

• Quantum Error Correction for Beginners
• Layered architecture for quantum computing
• Quantum simulator of an open quantum system using superconducting qubits: exciton transport in photosynthetic complexes
• Architectural design for a topological cluster state quantum computer
• Fault tolerant architectures for superconducting qubits
• Two-dimensional cavity grid for scalable quantum computation with superconducting circuits
• Requirements for fault-tolerant factoring on an atom-optics quantum computer
• Deterministic optical quantum computer using photonic modules
• Proposal for a coherent quantum memory for propagating microwave photons
• Theoretical analysis of perfect quantum state transfer with superconducting qubits
• Quantum simulation of Anderson and Kondo lattices with superconducting qubits
• Surface Code Error Correction on a Defective Lattice
• An $\Theta (\sqrt{n})$-depth Quantum Adder on a 2D NTC Quantum Computer Architecture
• Accuracy threshold for concatenated error detection in one dimension
• Tunable coupling between three qubits as a building block for a superconducting quantum computer
• Supersolid phases of light in extended Jaynes-Cummings-Hubbard systems
• Logic Synthesis for Fault-Tolerant Quantum Computers
• Synthesis of Topological Quantum Circuits
• On wireless connection between Josephson qubits
• State injection, lattice surgery and dense packing of the deformation-based surface code
• Tensor-network-based variational Monte Carlo approach to the non-equilibrium steady state of open quantum systems
• Exploring the Fidelity of Flux Qubit Measurement in Different Bases via the Quantum Flux Parametron
• Programming a Topological Quantum Computer