Research Publications Archive

The latest in Quantum Thinking

Unlocking a fast adiabatic CZ gate and exact residual ZZ cancellation between fixed-frequency transmons using a floating tunable coupler

In this work, we demonstrate that a symmetric floating tunable coupler provides a natural platform for fast, high-fidelity adiabatic controlled-Z (CZ) gates. Its favorable energy-level structure eliminates the conventional trade-off between rapid conditional-phase accumulation and adiabatic evolution while preserving exact cancellation of residual ZZ interaction at idling.

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Systems R&D 02.02.18

Demonstration of universal parametric entangling gates on a multi-qubit lattice

We show that parametric coupling techniques can be used to generate selective entangling interactions for multi-qubit processors.

Systems R&D 15.08.17

Superconducting through-silicon vias for quantum integrated circuits

We describe a microfabrication process for superconducting through-silicon vias appropriate for use in superconducting qubit quantum processors.

Systems R&D 15.08.17

Superconducting caps for quantum integrated circuits

We report on the fabrication and metrology of superconducting caps for qubit circuits.

Systems R&D 07.08.17

Charge and flux insensitive tunable superconducting qubit

We propose a flux-tunable superconducting qubit that minimizes the dephasing due to magnetic flux noise by engineering controllable flux “sweet spots” at frequencies of interest.

Systems R&D 20.06.17

Analytical modeling of parametrically-modulated transmon qubits

We focus on superconducting quantum processors based on transmons for which full numerical simulations are already challenging at the level of qubytes.

Systems R&D 10.11.16

A functional architecture for scalable quantum computing

We describe such a functional architecture, based on a planar lattice of transmon and fluxonium qubits, parametric amplifiers, and a novel fast DC controlled two-qubit gate.

Systems R&D 11.08.16

A practical quantum instruction set architecture

We introduce an abstract machine architecture for classical/quantum computations.

Displaying 73–79 of 79 results