289 citations · 423 across the 3 of their papers we have counts for
4 papers · 1 filter
Verifying Multipartite Entangled GHZ States via Multiple Quantum Coherences
Ken X. Wei, Isaac Lauer, Srikanth Srinivasan +6
The ability to generate and verify multipartite entanglement is an important benchmark for near-term quantum devices devices. We develop a scalable entanglement metric based on mul…
High-efficiency measurement of an artificial atom embedded in a parametric amplifier
A. Eddins, J. M. Kreikebaum, D. M. Toyli +7
A crucial limit to measurement efficiencies of superconducting circuits comes from losses involved when coupling to an external quantum amplifier. Here, we realize a device circumv…
Stroboscopic qubit measurement with squeezed illumination
Andrew Eddins, Sydney Schreppler, David M. Toyli +6
Microwave squeezing represents the ultimate sensitivity frontier for superconducting qubit measurement. However, observation of enhancement has remained elusive, in part because in…
Effect of higher-order nonlinearities on amplification and squeezing in Josephson parametric amplifiers
Samuel Boutin, David M. Toyli, Aditya V. Venkatramani +3
Single-mode Josephson junction-based parametric amplifiers are often modeled as perfect amplifiers and squeezers. We show that, in practice, the gain, quantum efficiency, and outpu…