Phonon engineering of atomic-scale defects in superconducting quantum circuits
Noise within solid-state systems at low temperatures can typically be traced back to material
defects. In amorphous materials, these defects are broadly described by the tunneling two …
defects. In amorphous materials, these defects are broadly described by the tunneling two …
Decoherence induced by a sparse bath of two-level fluctuators: Peculiar features of noise in high-quality qubits
M Mehmandoost, VV Dobrovitski - Physical Review Research, 2024 - APS
Progress in fabrication of semiconductor and superconductor qubits has greatly diminished
the number of decohering defects, thus decreasing the devastating low-frequency 1/f noise …
the number of decohering defects, thus decreasing the devastating low-frequency 1/f noise …
Characterizing losses in InAs two-dimensional electron gas-based gatemon qubits
The tunneling of Cooper pairs across a Josephson junction (JJ) allows for the nonlinear
inductance necessary to construct superconducting qubits, amplifiers, and various other …
inductance necessary to construct superconducting qubits, amplifiers, and various other …
Flux qubit based detector of microwave photons
A theory of detection of microwave photons with a flux qubit based detector is presented. We
consider a semiclassical approximation with the electromagnetic field being in a coherent …
consider a semiclassical approximation with the electromagnetic field being in a coherent …
Magnets are Weber Bar Gravitational Wave Detectors
When a gravitational wave (GW) passes through a DC magnetic field, it couples to the
conducting wires carrying the currents which generate the magnetic field, causing them to …
conducting wires carrying the currents which generate the magnetic field, causing them to …
[HTML][HTML] Resource-efficient digital characterization and control of classical non-Gaussian noise
We show the usefulness of frame-based characterization and control [PRX Quantum 2,
030315 (2021)] for non-Markovian open quantum systems subject to classical non-Gaussian …
030315 (2021)] for non-Markovian open quantum systems subject to classical non-Gaussian …
Dephasing in fluxonium qubits from coherent quantum phase slips
Phase slips occur across all Josephson junctions (JJs) at a rate that increases with the
impedance of the junction. In superconducting qubits composed of JJ-array superinductors …
impedance of the junction. In superconducting qubits composed of JJ-array superinductors …
A universal framework for quantum dissipation: minimally extended state space and exact time-local dynamics
The dynamics of open quantum systems is formulated in a minimally extended state space
comprising the degrees of freedom of a system of interest and a finite set of non-unitary, pure …
comprising the degrees of freedom of a system of interest and a finite set of non-unitary, pure …
Implementation of scalable suspended superinductors
Superinductors have become a crucial component in the superconducting circuit toolbox,
playing a key role in the development of more robust qubits. Enhancing the performance of …
playing a key role in the development of more robust qubits. Enhancing the performance of …
Robust gates with spin-locked superconducting qubits
Dynamical decoupling is effective in reducing gate errors in most quantum computation
platforms and is therefore projected to play an essential role in future fault-tolerant …
platforms and is therefore projected to play an essential role in future fault-tolerant …