7.2k citations · 24.9k across the 107 of their papers we have counts for
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Observation of classical-quantum crossover of 1/f flux noise and its paramagnetic temperature dependence
C. M. Quintana, Yu Chen, D. Sank +25
By analyzing the dissipative dynamics of a tunable gap flux qubit, we extract both sides of its two-sided environmental flux noise spectral density over a range of frequencies arou…
Characterizing Quantum Supremacy in Near-Term Devices
Sergio Boixo, Sergei V. Isakov, Vadim N. Smelyanskiy +6
A critical question for the field of quantum computing in the near future is whether quantum devices without error correction can perform a well-defined computational task beyond t…
Optimizing Variational Quantum Algorithms using Pontryagin's Minimum Principle
Zhi-Cheng Yang, Armin Rahmani, Alireza Shabani +2
We use Pontryagin's minimum principle to optimize variational quantum algorithms. We show that for a fixed computation time, the optimal evolution has a bang-bang (square pulse) fo…
Tunable inductive coupling of superconducting qubits in the strongly nonlinear regime
Dvir Kafri, Chris Quintana, Yu Chen +3
For a variety of superconducting qubits, tunable interactions are achieved through mutual inductive coupling to a coupler circuit containing a nonlinear Josephson element. In this…
Chiral groundstate currents of interacting photons in a synthetic magnetic field
P. Roushan, C. Neill, A. Megrant +22
The intriguing many-body phases of quantum matter arise from the interplay of particle interactions, spatial symmetries, and external fields. Generating these phases in an engineer…
Scaling analysis and instantons for thermally-assisted tunneling and Quantum Monte Carlo simulations
Zhang Jiang, Vadim N. Smelyanskiy, Sergei V. Isakov +4
We develop an instantonic calculus to derive an analytical expression for the thermally-assisted tunneling decay rate of a metastable state in a fully connected quantum spin model.…
What is the Computational Value of Finite Range Tunneling?
Vasil S. Denchev, Sergio Boixo, Sergei V. Isakov +5
Quantum annealing (QA) has been proposed as a quantum enhanced optimization heuristic exploiting tunneling. Here, we demonstrate how finite range tunneling can provide considerable…