163 citations · 1k across the 41 of their papers we have counts for
41 papers
Benchmarking Quantum Processor Performance at Scale
David C. McKay, Ian Hincks, Emily J. Pritchett +3
As quantum processors grow, new performance benchmarks are required to capture the full quality of the devices at scale. While quantum volume is an excellent benchmark, it focuses…
Readout-induced suppression and enhancement of superconducting qubit lifetimes
Ted Thorbeck, Zhihao Xiao, Archana Kamal +1
It has long been known that the lifetimes of superconducting qubits suffer during readout, increasing readout errors. We show that this degradation is due to the anti-Zeno effect,…
Scalable entanglement stabilization with modular reservoir engineering
E. Doucet, L. C. G. Govia, A. Kamal
Dissipation engineering is a powerful framework for quantum state preparation and autonomous error correction in few-qubit systems. In this work, we examine the scalability of this…
A randomized benchmarking suite for mid-circuit measurements
L. C. G. Govia, P. Jurcevic, C. J. Wood +3
Mid-circuit measurements are a key component in many quantum information computing protocols, including quantum error correction, fault-tolerant logical operations, and measurement…
Time-dependent Schrieffer-Wolff-Lindblad Perturbation Theory: measurement-induced dephasing and second-order Stark shift in dispersive readout
Moein Malekakhlagh, Easwar Magesan, Luke C. G. Govia
We develop a time-dependent Schrieffer-Wolff-Lindblad perturbation theory to study effective interactions for driven open quantum systems. The starting point of our analysis is a g…
Effective qubit dephasing induced by spectator-qubit relaxation
Petar Jurcevic, Luke C. G. Govia
In many leading architectures for quantum computing, it remains to be understood if we can equate single-qubit coherence times measured in isolation, to that of coherence times mea…
Stabilizing two-qubit entanglement by mimicking a squeezed environment
L. C. G. Govia, A. Lingenfelter, A. A. Clerk
It is well known that qubits immersed in a squeezed vacuum environment exhibit many exotic phenomena, including dissipative entanglement stabilization. Here, we show that these eff…
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…
Trade off-Free Entanglement Stabilization in a Superconducting Qutrit-Qubit System
Tristan Brown, Emery Doucet, Diego Ristè +7
Quantum reservoir engineering is a powerful framework for autonomous quantum state preparation and error correction. However, traditional approaches to reservoir engineering are hi…
Freedom of mixer rotation-axis improves performance in the quantum approximate optimization algorithm
L. C. G. Govia, C. Poole, M. Saffman +1
Variational quantum algorithms such as the quantum approximate optimization algorithm (QAOA) are particularly attractive candidates for implementation on near-term quantum processo…
Strong parametric dispersive shifts in a statically decoupled multi-qubit cavity QED system
T. Noh, Z. Xiao, K. Cicak +8
Cavity quantum electrodynamics (QED) with in-situ tunable interactions is important for developing novel systems for quantum simulation and computing. The ability to tune the dispe…
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…
Perturbative diagonalization for time-dependent strong interactions
Z. Xiao, E. Doucet, T. Noh +4
We present a systematic method to implement a perturbative Hamiltonian diagonalization based on the time-dependent Schrieffer-Wolff transformation. Applying our method to strong pa…
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…
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…
Integration of spectator qubits into quantum computer architectures for hardware tuneup and calibration
Riddhi S. Gupta, Luke C. G. Govia, Michael J. Biercuk
Performing efficient quantum computer tuneup and calibration is essential for growth in system complexity. In this work we explore the link between facilitating such capabilities a…
Quantum Simulation of a Discrete-Time Quantum Stochastic Walk
Peter K. Schuhmacher, Luke C. G. Govia, Bruno G. Taketani +1
Quantum walks have been shown to have a wide range of applications, from artificial intelligence, to photosynthesis, and quantum transport. Quantum stochastic walks (QSWs) generali…
Heisenberg-limited spin-squeezing via bosonic parametric driving
Peter Groszkowski, Hoi-Kwan Lau, C. Leroux +2
Spin-spin interactions generated by a detuned cavity are a standard mechanism for generating highly entangled spin squeezed states. We show here how introducing a weak detuned para…
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…
Numerical finite-key analysis of quantum key distribution
Darius Bunandar, Luke C. G. Govia, Hari Krovi +1
Quantum key distribution (QKD) allows for secure communications safe against attacks by quantum computers. QKD protocols are performed by sending a sizeable, but finite, number of…
Clifford group restricted eavesdroppers in quantum key distribution
L. C. G. Govia, D. Bunandar, J. Lin +3
Quantum key distribution (QKD) promises provably secure cryptography, even to attacks from an all-powerful adversary. However, with quantum computing development lagging behind QKD…