221 citations · 478 across the 9 of their papers we have counts for
9 papers
Demonstrating a superconducting dual-rail cavity qubit with erasure-detected logical measurements
Kevin S. Chou, Tali Shemma, Heather McCarrick +31
A critical challenge in developing scalable error-corrected quantum systems is the accumulation of errors while performing operations and measurements. One promising approach is to…
Fully Directional Quantum-limited Phase-Preserving Amplifier
Gangqiang Liu, Andrew Lingenfelter, Vidul R. Joshi +4
We present a way to achieve fully directional, quantum-limited phase-preserving amplification in a four-port, four-mode superconducting Josephson circuit by utilizing interference…
Magnetic field-resilient quantum-limited parametric amplifier
Mingrui Xu, Risheng Cheng, Yufeng Wu +2
Superconducting parametric amplifiers are crucial components in microwave quantum circuits for enabling quantum-limited signal readout. The best-performing such amplifiers are ofte…
Josephson Array Mode Parametric Amplifier
V. V. Sivak, S. Shankar, G. Liu +2
We introduce a novel near-quantum-limited amplifier with a large tunable bandwidth and high dynamic range - the Josephson Array Mode Parametric Amplifier (JAMPA). The signal and id…
Multiparametric Amplification and Qubit Measurement with a Kerr-free Josephson Ring Modulator
T. -C. Chien, O. Lanes, C. Liu +6
Josephson-junction based parametric amplifiers have become a ubiquitous component in superconducting quantum machines. Although parametric amplifiers regularly achieve near-quantum…
Bose-Einstein Condensation of Long-Lifetime Polaritons in Thermal Equilibrium
Yongbao Sun, Patrick Wen, Yoseob Yoon +6
Exciton-polaritons in semiconductor microcavities have been used to demonstrate quantum effects such as Bose-Einstein condensation, superfluity, and quantized vortices. However, in…
Spin-Flipping Half Vortex in a Macroscopic Polariton Spinor Ring Condensate
Gangqiang Liu, David W. Snoke, Andrew Daley +2
We report the observation of vorticity in a macroscopic Bose-Einstein condensate of polaritons in a ring geometry. Because it is a spinor condensate, the elementary excitations are…
Long Range Ballistic Motion and Coherent Flow of Long Lifetime Polaritons
Mark Steger, Gangqiang Liu, Bryan Nelsen +5
Exciton-polaritons can be created in semiconductor microcavities. These quasiparticles act as weakly interacting bosons with very light mass, of the order of times the va…
Coherent Flow and Trapping of Polariton Condensates with Long Lifetime
Bryan Nelsen, Gangqiang Liu, Mark Steger +4
We report new results of Bose-Einstein condensation of polaritons in specially designed microcavities with very high quality factor, on the order of , giving the polariton li…