2k citations · 12.8k across the 101 of their papers we have counts for
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Quantum sensors that compute: quantum computational magnetic-field sensing using a superconducting qubit
Purnendu Sen, Mathieu Ouellet, Saeed A. Khan +6
A measurement of a single-qubit quantum sensor reveals at most 1 bit of information about the signal that was sensed. To perform a classification task on the signal, the convention…
Decoherence of a tunable capacitively shunted flux qubit
R. Trappen, X. Dai, M. A. Yurtalan +19
Quantum annealing is a method to solve optimization problems that leverages quantum tunneling in a coupled qubit system. We present a detailed study of the coherence of a tunable c…
Probing entanglement across the energy spectrum of a hard-core Bose-Hubbard lattice
Amir H. Karamlou, Ilan T. Rosen, Sarah E. Muschinske +16
Entanglement and its propagation are central to understanding a multitude of physical properties of quantum systems. Notably, within closed quantum many-body systems, entanglement…
Quantum Inspired Optimization for Industrial Scale Problems
William P. Banner, Shima Bab Hadiashar, Grzegorz Mazur +7
Model-based optimization, in concert with conventional black-box methods, can quickly solve large-scale combinatorial problems. Recently, quantum-inspired modeling schemes based on…
High-Fidelity, Frequency-Flexible Two-Qubit Fluxonium Gates with a Transmon Coupler
Leon Ding, Max Hays, Youngkyu Sung +16
We propose and demonstrate an architecture for fluxonium-fluxonium two-qubit gates mediated by transmon couplers (FTF, for fluxonium-transmon-fluxonium). Relative to architectures…
Learning-based Calibration of Flux Crosstalk in Transmon Qubit Arrays
Cora N. Barrett, Amir H. Karamlou, Sarah E. Muschinske +13
Superconducting quantum processors comprising flux-tunable data and coupler qubits are a promising platform for quantum computation. However, magnetic flux crosstalk between the fl…
Scaling Qubit Readout with Hardware Efficient Machine Learning Architectures
Satvik Maurya, Chaithanya Naik Mude, William D. Oliver +2
Reading a qubit is a fundamental operation in quantum computing. It translates quantum information into classical information enabling subsequent classification to assign the qubit…
Longitudinal coupling between a Si/SiGe quantum dot and an off-chip TiN resonator
J. Corrigan, Benjamin Harpt, Nathan Holman +10
Superconducting cavities have emerged as a key tool for measuring the spin states of quantum dots. So far however, few experiments have explored longitudinal couplings between dots…
Nonreciprocal devices based on voltage-tunable junctions
Catherine Leroux, Adrian Parra-Rodriguez, Ross Shillito +6
We propose to couple the flux degree of freedom of one mode with the charge degree of freedom of a second mode in a hybrid superconducting-semiconducting architecture. Nonreciproci…
Dissipative Landau-Zener tunneling in the crossover regime from weak to strong environment coupling
X. Dai, R. Trappen, H. Chen +22
Landau-Zener tunneling, which describes the transition in a two-level system during a sweep through an anti-crossing, is a model applicable to a wide range of physical phenomena. R…
Demonstration of tunable three-body interactions between superconducting qubits
Tim Menke, William P. Banner, Thomas R. Bergamaschi +16
Nonpairwise multi-qubit interactions present a useful resource for quantum information processors. Their implementation would facilitate more efficient quantum simulations of molec…
Extensible circuit-QED architecture via amplitude- and frequency-variable microwaves
Agustin Di Paolo, Catherine Leroux, Thomas M. Hazard +4
We introduce a circuit-QED architecture combining fixed-frequency qubits and microwave-driven couplers. In the appropriate frame, the drive parameters appear as tunable knobs enabl…
On-Demand Directional Microwave Photon Emission Using Waveguide Quantum Electrodynamics
Bharath Kannan, Aziza Almanakly, Youngkyu Sung +16
Routing quantum information between non-local computational nodes is a foundation for extensible networks of quantum processors. Quantum information transfer between arbitrary node…
Broadband Squeezed Microwaves and Amplification with a Josephson Traveling-Wave Parametric Amplifier
Jack Y. Qiu, Arne Grimsmo, Kaidong Peng +16
Squeezing of the electromagnetic vacuum is an essential metrological technique used to reduce quantum noise in applications spanning gravitational wave detection, biological micros…
Distinguishing multi-spin interactions from lower-order effects
Thomas R. Bergamaschi, Tim Menke, William P. Banner +5
Multi-spin interactions can be engineered with artificial quantum spins. However, it is challenging to verify such interactions experimentally. Here we describe two methods to char…
Mediated interactions beyond the nearest neighbor in an array of superconducting qubits
Yariv Yanay, Jochen Braumüller, Terry P. Orlando +3
We consider mediated interactions in an array of floating transmons, where each qubit capacitor consists of two superconducting pads galvanically isolated from ground. Each such pa…
Quantum transport and localization in 1d and 2d tight-binding lattices
Amir H. Karamlou, Jochen Braumüller, Yariv Yanay +16
Particle transport and localization phenomena in condensed-matter systems can be modeled using a tight-binding lattice Hamiltonian. The ideal experimental emulation of such a model…
CircuitQ: An open-source toolbox for superconducting circuits
Philipp Aumann, Tim Menke, William D. Oliver +1
We introduce CircuitQ, an open-source toolbox for the analysis of superconducting circuits implemented in Python. It features the automated construction of a symbolic Hamiltonian o…
Improving qubit coherence using closed-loop feedback
Antti Vepsäläinen, Roni Winik, Amir H. Karamlou +11
Superconducting qubits are a promising platform for building a larger-scale quantum processor capable of solving otherwise intractable problems. In order for the processor to reach…
Lindblad Tomography of a Superconducting Quantum Processor
Gabriel O. Samach, Ami Greene, Johannes Borregaard +15
As progress is made towards the first generation of error-corrected quantum computers, robust characterization and validation protocols are required to assess the noise environment…
Fabrication of superconducting through-silicon vias
Justin L. Mallek, Donna-Ruth W. Yost, Danna Rosenberg +15
Increasing circuit complexity within quantum systems based on superconducting qubits necessitates high connectivity while retaining qubit coherence. Classical micro-electronic syst…
Error mitigation via stabilizer measurement emulation
A. Greene, M. Kjaergaard, M. E. Schwartz +16
Dynamical decoupling (DD) is a widely-used quantum control technique that takes advantage of temporal symmetries in order to partially suppress quantum errors without the need reso…
Deep Neural Network Discrimination of Multiplexed Superconducting Qubit States
Benjamin Lienhard, Antti Vepsäläinen, Luke C. G. Govia +15
Demonstrating a quantum computational advantage will require high-fidelity control and readout of multi-qubit systems. As system size increases, multiplexed qubit readout becomes a…
Probing quantum information propagation with out-of-time-ordered correlators
Jochen Braumüller, Amir H. Karamlou, Yariv Yanay +13
Interacting many-body quantum systems show a rich array of physical phenomena and dynamical properties, but are notoriously difficult to study: they are challenging analytically an…