Northwestern’s Office for Research has published an article “From Qubits to Climate Change: Northwestern Quantum Experts See Powerful Potential” including interviews with Jim Sauls and Jens Koch.
Author: jko324
scQubits featured in NU Weinberg news article
The recent release of the scQubits python package has been covered in a news article published on the website of Northwestern’s Weinberg College of Arts and Sciences.
New PRX publication: Observation of a dissipative phase transition in a cQED lattice
Nonequilibrium phase transitions pose many questions and challenges, in part due to their complexity in theoretical descriptions, in part due to the experimental difficulties in systematically controlling systems out of equilibrium. In work now published in a new PRX article, the Houck Lab has studied a chain of 72 microwave cavities, each coupled to a […]
New preprint: Speedup for quantum optimal control from GPU-based automatic differentiation
In a new preprint, we show how to implement a quantum optimal control algorithm with automatic differentiation executed on a GPU. This work, done in collaboration with the Schuster Lab, highlights how automatic differentiation allows one to specify advanced optimization criteria and incorporate them in the optimization process with ease. We demonstrate that the use […]
Published in PRX and highlighted with a Viewpoint: Paper on Scanning Defect Microscopy
While measurements of global system properties are often readily obtained, measurements of more detailed local properties can provide a deeper understanding of the system at hand on a microscopic level. However, measuring local properties is often difficult. One solution is to use scanning probe measurements in which a probe is dragged across the surface of […]
Paper on resummation in Lindblad perturbation theory in PRX
Photons are particles with rather special properties. They are easily created by a light source, absorbed by matter, and may repel or attract each other when in contact with a suitable material. The idea of feeding photons into crystal-like structures in which photons move between preferred positions and interact with each other, has recently captured […]
Mohamed Abdelhafez wins prestigious teaching award
Mohamed has been awarded the 2016 Wayne C. Booth Graduate Student Prize for Excellence in Teaching by the University of Chicago! The Wayne C. Booth Graduate Student Prize for Excellence in Teaching was established in 1991 in honor of Wayne C. Booth, the George M. Pullman Distinguished Service Professor in English Language & Literature and […]
Nicholas Irons wins NU Summer Research Grant
Nicholas has been awarded a Weinberg College Summer Research Grant! This award is made possible by the generous support of the Richman Fund for Undergraduate Research and Weinberg College of Arts and Sciences alumni.
Paper on nematic quantum liquid crystals in frustrated lattices published in Phys. Rev. B
The problem of interacting bosons in frustrated lattices is an intricate one due to the absence of a unique minimum in the single-particle dispersion where macroscopic number of bosons can condense. In this paper, we consider a family of tight-binding models with macroscopically degenerate lowest energy bands, separated from other bands by a gap.We predict […]
Phys. Rev. B article on degenerate ground states in a superconducting circuit
We study the properties of an advanced superconducting circuit, the 0-π circuit. This device, previously introduced by Brooks et al. in Phys. Rev. A 87, 052306 (2013), has multiple intriguing characteristics. With the right choice of parameters – it can exhibit a (near) degeneracy of the ground state, be robust with respect to dephasing, and […]