28 citations · 60 across the 26 of their papers we have counts for
9 papers · 2 filters
Probing Sensitivity near a Quantum Exceptional Point using Waveguide Quantum Electrodynamics
Aziza Almanakly, Reouven Assouly, Harry Hanlim Kang +8
Non-Hermitian Hamiltonians with complex eigenenergies are useful tools for describing the dynamics of open quantum systems. In particular, parity and time (PT) symmetric Hamiltonia…
Emergent Harmonics in Josephson Tunnel Junctions Due to Series Inductance
Junghyun Kim, Max Hays, Ilan T. Rosen +11
Josephson tunnel junctions are essential elements of superconducting quantum circuits. The operability of these circuits presumes a -periodic sinusoidal potential of a tunnel j…
Improving Transmon Qubit Performance with Fluorine-based Surface Treatments
Michael A. Gingras, Bethany M. Niedzielski, Kevin A. Grossklaus +21
Reducing materials and processing-induced decoherence is critical to the development of utility-scale quantum processors based on superconducting qubits. Here we report on the impa…
Placing and routing quantum LDPC codes in multilayer superconducting hardware
Melvin Mathews, Lukas Pahl, David Pahl +4
Quantum error-correcting codes with asymptotically lower overheads than the surface code require nonlocal connectivity. Leveraging multilayer routing and long-range coupling capabi…
Temperature and Magnetic-Field Dependence of Energy Relaxation in a Fluxonium Qubit
Lamia Ateshian, Max Hays, David A. Rower +14
Noise from material defects at device interfaces is known to limit the coherence of superconducting circuits, yet our understanding of the defect origins and noise mechanisms remai…
Theory of quasiparticle generation by microwave drives in superconducting qubits
Shoumik Chowdhury, Max Hays, Shantanu R. Jha +4
Microwave drives play a central role in the control of superconducting quantum circuits, enabling qubit gates, readout, and parametric interactions. As the drive frequencies are ty…
High-Efficiency, Low-Loss Floquet-mode Traveling Wave Parametric Amplifier
Jennifer Wang, Kaidong Peng, Jeffrey M. Knecht +12
Advancing fault-tolerant quantum computing and fundamental science necessitates quantum-limited amplifiers with near-ideal quantum efficiency and multiplexing capability. However,…
Non-degenerate noise-resilient superconducting qubit
Max Hays, Junghyun Kim, William D. Oliver
We propose a superconducting qubit based on engineering the first and second harmonics of the Josephson energy and phase relation and . By constructin…
Efficient Qubit Calibration by Binary-Search Hamiltonian Tracking
Fabrizio Berritta, Jacob Benestad, Lukas Pahl +14
We present and experimentally implement a real-time protocol for calibrating the frequency of a resonantly driven qubit, achieving exponential scaling in calibration precision with…