429 citations · 2.1k across the 32 of their papers we have counts for
32 papers
Miniaturizing transmon qubits using van der Waals materials
Abhinandan Antony, Martin V. Gustafsson, Guilhem J. Ribeill +8
Quantum computers can potentially achieve an exponential speedup versus classical computers on certain computational tasks, as recently demonstrated in systems of superconducting q…
Making high-quality quantum microwave devices with van der Waals superconductors
Abhinandan Antony, Martin V. Gustafsson, Anjaly Rajendran +5
Ultra low-loss microwave materials are crucial for enhancing quantum coherence and scalability of superconducting qubits. Van der Waals (vdW) heterostructure is an attractive platf…
A universal quantum gate set for transmon qubits with strong ZZ interactions
Junling Long, Tongyu Zhao, Mustafa Bal +13
High-fidelity single- and two-qubit gates are essential building blocks for a fault-tolerant quantum computer. While there has been much progress in suppressing single-qubit gate e…
Characterizing mid-circuit measurements on a superconducting qubit using gate set tomography
Kenneth Rudinger, Guilhem J. Ribeill, Luke C. G. Govia +6
Measurements that occur within the internal layers of a quantum circuit -- mid-circuit measurements -- are an important quantum computing primitive, most notably for quantum error…
Reservoir Computing with Superconducting Electronics
Graham E. Rowlands, Minh-Hai Nguyen, Guilhem J. Ribeill +5
The rapidity and low power consumption of superconducting electronics makes them an ideal substrate for physical reservoir computing, which commandeers the computational power inhe…
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…
Symmetry-Aware Reservoir Computing
Wendson A. S. Barbosa, Aaron Griffith, Graham E. Rowlands +5
We demonstrate that matching the symmetry properties of a reservoir computer (RC) to the data being processed dramatically increases its processing power. We apply our method to th…
Neuromorphic computing with a single qudit
W. D. Kalfus, G. J. Ribeill, G. E. Rowlands +3
Accelerating computational tasks with quantum resources is a widely-pursued goal that is presently limited by the challenges associated with high-fidelity control of many-body quan…
Josephson-junction infrared single-photon detector
Evan D. Walsh, Woochan Jung, Gil-Ho Lee +9
Josephson junctions (JJs) are ubiquitous superconducting devices, enabling high sensitivity magnetometers and voltage amplifiers, as well as forming the basis of high performance c…
High-Fidelity Control of Superconducting Qubits Using Direct Microwave Synthesis in Higher Nyquist Zones
William D. Kalfus, Diana F. Lee, Guilhem J. Ribeill +5
Control electronics for superconducting quantum processors have strict requirements for accurate command of the sensitive quantum states of their qubits. Hinging on the purity of u…
Quantum reservoir computing with a single nonlinear oscillator
L. C. G. Govia, G. J. Ribeill, G. E. Rowlands +2
Realizing the promise of quantum information processing remains a daunting task, given the omnipresence of noise and error. Adapting noise-resilient classical computing modalities…
Real-time decoding of stabilizer measurements in a bit-flip code
Diego Ristè, Luke C. G. Govia, Brian Donovan +5
Although qubit coherence times and gate fidelities are continuously improving, logical encoding is essential to achieve fault tolerance in quantum computing. In most encoding schem…
Nanosecond Reversal of Three-Terminal Spin Hall Effect Memories Sustained at Cryogenic Temperatures
Graham E. Rowlands, Minh-Hai Nguyen, Sriharsha V. Aradhya +4
We characterize the nanosecond pulse switching performance of the three-terminal magnetic tunnel junctions (MTJs), driven by the spin Hall effect (SHE) in the channel, at a cryogen…
Graphene-based Josephson junction microwave bolometer
Gil-Ho Lee, Dmitri K. Efetov, Woochan Jung +8
Sensitive microwave detectors are critical instruments in radioastronomy, dark matter axion searches, and superconducting quantum information science. The conventional strategy tow…
Cryogenic Memory Architecture Integrating Spin Hall Effect based Magnetic Memory and Superconductive Cryotron Devices
Minh-Hai Nguyen, Guilhem J. Ribeill, Martin Gustafsson +19
One of the most challenging obstacles to realizing exascale computing is minimizing the energy consumption of L2 cache, main memory, and interconnects to that memory. For promising…
Cross-resonance interactions between superconducting qubits with variable detuning
Matthew Ware, Blake R. Johnson, Jay M. Gambetta +3
Cross-resonance interactions are a promising way to implement all-microwave two-qubit gates with fixed-frequency qubits. In this work, we study the dependence of the cross-resonanc…
Kinetic Inductance Traveling Wave Amplifiers For Multiplexed Qubit Readout
Leonardo Ranzani, Mustafa Bal, Kin Chung Fong +7
We describe a kinetic inductance traveling-wave (KIT) amplifier suitable for superconducting quantum information measurements and characterize its wideband scattering and noise pro…
Coherent spin-transfer precession switching in orthogonal spin-torque devices
Graham E. Rowlands, Colm A. Ryan, Li Ye +4
We present experimental results and macrospin simulations of the switching characteristics of orthogonal spin-transfer devices incorporating an out-of-plane magnetized polarizing l…
Hardware for Dynamic Quantum Computing
Colm A. Ryan, Blake R. Johnson, Diego Ristè +2
We describe the hardware, gateware, and software developed at Raytheon BBN Technologies for dynamic quantum information processing experiments on superconducting qubits. In dynamic…
Graphene-based Josephson junction single photon detector
Evan D. Walsh, Dmitri K. Efetov, Gil-Ho Lee +6
We propose to use graphene-based Josephson junctions (gJjs) to detect single photons in a wide electromagnetic spectrum from visible to radio frequencies. Our approach takes advant…
Reliable spin-transfer torque driven precessional magnetization reversal with an adiabatically decaying pulse
Daniele Pinna, Colm Ryan, Thomas Ohki +1
We show that a slowly decaying current pulse can lead to nearly deterministic precessional switching in the presence of noise. We consider a biaxial macrospin, with an easy axis in…
Demonstration of Robust Quantum Gate Tomography via Randomized Benchmarking
Blake R. Johnson, Marcus P. da Silva, Colm A. Ryan +3
Typical quantum gate tomography protocols struggle with a self-consistency problem: the gate operation cannot be reconstructed without knowledge of the initial state and final meas…
Development of high frequency and wide bandwidth Johnson noise thermometry
Jesse Crossno, Xiaomeng Liu, Thomas A. Ohki +2
We develop a high frequency, wide bandwidth radiometer operating at room temperature, which augments the traditional technique of Johnson noise thermometry for nanoscale thermal tr…
Tomography via Correlation of Noisy Measurement Records
Colm A. Ryan, Blake R. Johnson, Jay M. Gambetta +4
We present methods and results of shot-by-shot correlation of noisy measurements to extract entangled state and process tomography in a superconducting qubit architecture. We show…