559 citations · 3.1k across the 39 of their papers we have counts for
39 papers
Engineering a multi-level bath for transmons with three-wave mixing and parametric drives
Xi Cao, Maria Mucci, Gangqiang Liu +2
A quantum system with a tunable bath temperature provides an additional degree of freedom for quantum simulators. Such a system can be realized by parametrically modulating the cou…
Simple, High Saturation Power, Quantum-limited, RF SQUID Array-based Josephson Parametric Amplifiers
Ryan Kaufman, Chenxu Liu, Katarina Cicak +7
High-fidelity quantum non-demolition qubit measurement is critical to error correction and rapid qubit feedback in large-scale quantum computing. High-fidelity readout requires pas…
Pump-efficient Josephson parametric amplifiers with high saturation power
Nicholas M. Hougland, Zhuan Li, Ryan Kaufman +4
Circuit QED based quantum information processing relies on low noise amplification for signal readout. In the realm of microwave superconducting circuits, this amplification is oft…
Experimental advances with the QICK (Quantum Instrumentation Control Kit) for superconducting quantum hardware
Chunyang Ding, Martin Di Federico, Michael Hatridge +14
The QICK is a standalone open source qubit controller that was first introduced in 2022. In this follow-up work, we present recent experimental use cases that the QICK uniquely ena…
Practical Trainable Temporal Postprocessor for Multistate Quantum Measurement
Saeed A. Khan, Ryan Kaufman, Boris Mesits +2
We develop and demonstrate a trainable temporal post-processor (TPP) harnessing a simple but versatile machine learning algorithm to provide optimal processing of quantum measureme…
MIRAGE: Quantum Circuit Decomposition and Routing Collaborative Design using Mirror Gates
Evan McKinney, Michael Hatridge, Alex K. Jones
Building efficient large-scale quantum computers is a significant challenge due to limited qubit connectivities and noisy hardware operations. Transpilation is critical to ensure t…
Fast superconducting qubit control with sub-harmonic drives
Mingkang Xia, Chao Zhou, Chenxu Liu +8
Increasing the fidelity of single-qubit gates requires a combination of faster pulses and increased qubit coherence. However, with resonant qubit drive via a capacitively coupled p…
Parallel Driving for Fast Quantum Computing Under Speed Limits
Evan McKinney, Chao Zhou, Mingkang Xia +2
Increasing quantum circuit fidelity requires an efficient instruction set to avoid errors from decoherence. The choice of a two-qubit (2Q) hardware basis gate depends on a quantum…
Architectures for Multinode Superconducting Quantum Computers
James Ang, Gabriella Carini, Yanzhu Chen +30
Many proposals to scale quantum technology rely on modular or distributed designs where individual quantum processors, called nodes, are linked together to form one large multinode…
Quantum-limited amplification without instability
A. Metelmann, O. Lanes, T-Z. Chien +4
Quantum parametric amplifiers typically generate by operating in proximity to a point of dynamical instability. We consider an alternate general strategy where quantum-limited, lar…
Co-Designed Architectures for Modular Superconducting Quantum Computers
Evan McKinney, Mingkang Xia, Chao Zhou +3
Noisy, Intermediate Scale Quantum (NISQ) computers have reached the point where they can show the potential for quantum advantage over classical computing. Unfortunately, NISQ mach…
Realizing all-to-all couplings among detachable quantum modules using a microwave quantum state router
Chao Zhou, Pinlei Lu, Matthieu Praquin +8
One of the primary challenges in realizing large-scale quantum processors is the realization of qubit couplings that balance interaction strength, connectivity, and mode confinemen…
Proposal for a continuous wave laser with linewidth well below the standard quantum limit
Chenxu Liu, Maria Mucci, Xi Cao +3
Due to their high coherence, a laser is a ubiquitous tool in science. We show that by engineering the coupling between the gain medium and the laser cavity as well as the laser cav…
Noise reduction in qubit readout with a two-mode squeezed interferometer
G. Liu, X. Cao, T. -C. Chien +3
Fault-tolerant quantum information processing with flawed qubits and gates requires highly efficient, quantum non-demolition (QND) qubit readout. In superconducting circuits, qubit…
Nearly quantum-limited Josephson-junction Frequency Comb synthesizer
Pinlei Lu, Saeed Khan, Tzu-Chiao Chien +5
While coherently-driven Kerr microcavities have rapidly matured as a platform for frequency comb formation, such microresonators generally possess weak Kerr coefficients; consequen…
Optimizing Josephson-Ring-Modulator-based Josephson Parametric Amplifiers via full Hamiltonian control
Chenxu Liu, Tzu-Chiao Chien, Michael Hatridge +1
Josephson Parametric Amplifiers (JPA) are nonlinear devices that are used for quantum sensing and qubit readout in the microwave regime. While JPAs regularly operate in the quantum…
Superconducting Contact and Quantum Interference Between Two-Dimensional van der Waals and Three-Dimensional Conventional Superconductors
Michael R. Sinko, Sergio C. de la Barrera, Olivia Lanes +6
Two-dimensional (2D) transition-metal dichalcogenide superconductors have unique and desirable properties for integration with conventional superconducting circuits. However, fully…
Quantum back-action of variable-strength measurement
M. Hatridge, S. Shankar, M. Mirrahimi +9
Measuring a quantum system can randomly perturb its state. The strength and nature of this back-action depends on the quantity which is measured. In a partial measurement performed…
Multiparametric Amplification and Qubit Measurement with a Kerr-free Josephson Ring Modulator
T. -C. Chien, O. Lanes, C. Liu +6
Josephson-junction based parametric amplifiers have become a ubiquitous component in superconducting quantum machines. Although parametric amplifiers regularly achieve near-quantum…
Braidonium: a braiding quantum circuit based on the Josephson effect
John P. T. Stenger, Michael Hatridge, Sergey M. Frolov +1
We propose a topological qubit in which braiding and readout are mediated by the Majorana-Josephson effect. The braidonium device consists of three Majorana nanowires that com…
Generation of discord through a remote joint continuous variable measurement
E. Zalys-Geller, A. Narla, S. Shankar +5
In quantum mechanics, continuously measuring an observable steers the system into one eigenstate of that observable. This property has interesting and useful consequences when the…
Simultaneous monitoring of fluxonium qubits in a waveguide
A. Kou, W. C. Smith, U. Vool +5
Most quantum-error correcting codes assume that the decoherence of each physical qubit is independent of the decoherence of any other physical qubit. We can test the validity of th…
Josephson parametric converter saturation and higher order effects
G. Liu, T. -C. Chien, X. Cao +4
Microwave parametric amplifiers based on Josephson junctions have become a key component of many quantum information experiments. One key limitation which has not been well predict…
Robust concurrent remote entanglement between two superconducting qubits
A. Narla, S. Shankar, M. Hatridge +8
Entangling two remote quantum systems which never interact directly is an essential primitive in quantum information science and forms the basis for the modular architecture of qua…