566 citations · 6.3k across the 86 of their papers we have counts for
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Decoherence Induced Exceptional Points in a Dissipative Superconducting Qubit
Weijian Chen, Maryam Abbasi, Byung Ha +3
Open quantum systems interacting with an environment exhibit dynamics described by the combination of dissipation and coherent Hamiltonian evolution. Taken together, these effects…
Dark Matter Axion Search Using a Josephson Traveling Wave Parametric Amplifier
C. Bartram, T. Braine, R. Cervantes +48
We present a new exclusion bound of axion-like particle dark matter with axion-photon couplings above over the frequency range 4796.7--4799.…
Vantablack Shielding of Superconducting Qubit Systems
J. M. Kitzman, J. R. Lane, T. Stefanski +4
Circuit quantum electrodynamics (cQED) experiments on superconducting qubit systems typically employ radiation shields coated in photon absorbing materials to achieve high qubit co…
Search for "Invisible" Axion Dark Matter in the eV Mass Range
ADMX Collaboration, C. Bartram, T. Braine +49
We report the results from a haloscope search for axion dark matter in the eV mass range. This search excludes the axion-photon coupling predicted by one of the b…
Maximal quantum entanglement at exceptional points via unitary and thermal dynamics
Akhil Kumar, Kater W. Murch, Yogesh N. Joglekar
Minimal, open quantum systems that are governed by non-Hermitian Hamiltonians have been realized across multiple platforms in the past two years. Here we investigate the dynamics o…
Topological quantum state control through exceptional-point proximity
Maryam Abbasi, Weijian Chen, Mahdi Naghiloo +2
We study the quantum evolution of a non-Hermitian qubit realized as a submanifold of a dissipative superconducting transmon circuit. Real-time tuning of the system parameters to en…
Fabrication and surface treatment of electron-beam evaporated niobium for low-loss coplanar waveguide resonators
D. Kowsari, K. Zheng, J. T. Monroe +6
We characterize low-loss electron-beam evaporated niobium thin films deposited under ultra-high vacuum conditions. Slow deposition yields films with a high superconducting transiti…
Efficiently Fuelling a Quantum Engine with Incompatible Measurements
Sreenath K. Manikandan, Cyril Elouard, Kater W. Murch +2
We propose a quantum harmonic oscillator measurement engine fueled by simultaneous quantum measurements of the non-commuting position and momentum quadratures of the quantum oscill…
Single electrons on solid neon as a solid-state qubit platform
Xianjing Zhou, Gerwin Koolstra, Xufeng Zhang +9
Progress toward the realization of quantum computers requires persistent advances in their constituent building blocks - qubits. Novel qubit platforms that simultaneously embody lo…
Optical Direct Write of Dolan--Niemeyer-Bridge Junctions for Transmon Qubits
J. T. Monroe, D. Kowsari, K. Zheng +4
We characterize highly coherent transmon qubits fabricated with a direct-write photolithography system. Multi-layer evaporation and oxidation allows us to change the critical curre…
Quantum jumps in the non-Hermitian dynamics of a superconducting qubit
Weijian Chen, Maryam Abbasi, Yogesh N. Joglekar +1
We study the dynamics of a driven non-Hermitian superconducting qubit which is perturbed by quantum jumps between energy levels, a purely quantum effect with no classical correspon…
Observing a Topological Transition in Weak-Measurement-Induced Geometric Phases
Yunzhao Wang, Kyrylo Snizhko, Alessandro Romito +2
Measurement plays a quintessential role in the control of quantum systems. Beyond initialization and readout which pertain to projective measurements, weak measurements in particul…
Quantum process inference for a single qubit Maxwell's demon
Xingrui Song, Mahdi Naghiloo, Kater Murch
While quantum measurement theories are built around density matrices and observables, the laws of thermodynamics are based on processes such as are used in heat engines and refrige…