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Adaptive thresholding for scalable measurement-based qubit reset
Qian Cao, Unnati Akhouri, Samuel Vizvary +3
Fast, high-fidelity qubit initialization is a key primitive for scalable quantum information processing, but conventional reset protocols either require long relaxation times or di…
Mixed-State Symmetry-Protected Topology and Strong-to-Weak Spontaneous Symmetry Breaking in a Superconducting Qubit Array
Qian Cao, Zhen Bi, Kater W. Murch
We experimentally investigate how symmetry-protected topological order in a one-dimensional cluster state is transformed by measurement and decoherence in a five-qubit superconduct…
Temporal Diffraction Grating for Engineered Superconducting Qubit Dissipation
Pratik J. Barge, Kater W. Murch
Parametric frequency modulation is a standard tool in superconducting circuits for activating tunable interactions and implementing quantum gates. Here, we engineer dissipation in…
Measurement and Control of the Complex Berry Phase in a Quantum System
Pratik J. Barge, Qian Cao, Niklas Hörnedal +2
The Berry phase is a geometric phase acquired during adiabatic evolution over a closed loop in parameter space. It plays an essential role in geometric quantum gates and other phas…
Quantum metrology enhanced by effective time reversal
Yu-Xin Wang, Flavio Salvati, David R. M. Arvidsson-Shukur +3
Quantum metrology involves the application of quantum resources to enhance measurements. Several communities have developed quantum-metrology strategies that leverage effective tim…
Real-time Monitoring of Neon Film Growth for Electron-on-Neon Qubits
Sidharth Duthaluru, Kaiwen Zheng, Erik A. Henriksen +1
Electron-on-neon (eNe) charge states coupled to superconducting circuits are a promising platform for quantum computing. Control over the formation of these charge states requires…
Superconducting-antiqubit simulation enables optimal phase estimation via unitary inversion
Xingrui Song, Surihan Sean Borjigin, Flavio Salvati +4
A positron is equivalent to an electron traveling backward through time. Casting transmon superconducting qubits as akin to electrons, we simulate a positron with a transmon subjec…
Surface Morphology Assisted Trapping of Strongly Coupled Electron-on-Neon Charge States
Kaiwen Zheng, Xingrui Song, Kater W. Murch
Single electrons confined to a free neon surface and manipulated through the circuit quantum electrodynamics (circuit QED) architecture is a promising novel quantum computing platf…