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Quantum supremacy using a programmable superconducting processor
TLDR
Quantum supremacy is demonstrated using a programmable superconducting processor known as Sycamore, taking approximately 200 seconds to sample one instance of a quantum circuit a million times, which would take a state-of-the-art supercomputer around ten thousand years to compute. Expand
Scalable Quantum Simulation of Molecular Energies
We report the first electronic structure calculation performed on a quantum computer without exponentially costly precompilation. We use a programmable array of superconducting qubits to compute theExpand
State preservation by repetitive error detection in a superconducting quantum circuit
TLDR
The protection of classical states from environmental bit-flip errors is reported and the suppression of these errors with increasing system size is demonstrated, motivating further research into the many challenges associated with building a large-scale superconducting quantum computer. Expand
Superconducting quantum circuits at the surface code threshold for fault tolerance
TLDR
The results demonstrate that Josephson quantum computing is a high-fidelity technology, with a clear path to scaling up to large-scale, fault-tolerant quantum circuits. Expand
Quantum approximate optimization of non-planar graph problems on a planar superconducting processor
TLDR
The application of the Google Sycamore superconducting qubit quantum processor to combinatorial optimization problems with the quantum approximate optimization algorithm (QAOA) is demonstrated and an approximation ratio is obtained that is independent of problem size and for the first time, that performance increases with circuit depth. Expand
Planar Superconducting Resonators with Internal Quality Factors above One Million
We describe the fabrication and measurement of microwave coplanar waveguide resonators with internal quality factors above 10 million at high microwave powers and over 1 million at low powers, withExpand
Coherent Josephson qubit suitable for scalable quantum integrated circuits.
TLDR
This work demonstrates a planar, tunable superconducting qubit with energy relaxation times up to 44 μs and finds a fine structure in the qubit energy lifetime as a function of frequency, indicating the presence of a sparse population of incoherent, weakly coupled two-level defects. Expand
Fast accurate state measurement with superconducting qubits.
TLDR
A multiplexed measurement system with a bandpass filter that allows fast measurement without increasing environmental damping of the qubits is designed and used to demonstrate simultaneous measurement of four qubits on a single superconducting integrated circuit. Expand
Spectroscopic signatures of localization with interacting photons in superconducting qubits
TLDR
This work introduces a many-body spectroscopy technique based on a chain of superconducting qubits to study quantum phases of matter and introduces disorder to study the statistics of the energy levels of the system as it undergoes the transition from a thermalized to a localized phase. Expand
Digitized adiabatic quantum computing with a superconducting circuit.
TLDR
The demonstration of digitized adiabatic quantum computing in the solid state opens a path to synthesizing long-range correlations and solving complex computational problems. Expand
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