Join JQI for Our Third Annual World Quantum Day Reddit Event

Submitted by ccesare on

In honor of World Quantum Day on Sunday, April 14, we will be hosting our third annual Ask Us Anything event on Reddit beginning at 10 a.m. EDT on Friday, April 12.

Our thread is live: https://www.reddit.com/r/IAmA/comments/1c27ckj/we_are_quantum_scientists_at_the_university_of/.

Our prior two events are available at the links below:

Photon-Mediated Interactions in Lattices of Coplanar Waveguide Resonators

Submitted by mbritton on

Abstract: Circuit quantum electrodynamics (circuit QED) has become one of the main platforms for quantum simulation and computation. One of its notable advantages is its ability to facilitate the study of new regimes of light-matter interactions. This is achieved due to the native strong coupling between superconducting qubits and microwave resonators, and the ability to lithographically define a large variety of resonant microwave structures, for example, photonic crystals.

A Focused Approach Can Help Untangle Messy Quantum Scrambling Problems

Submitted by bedfordb on

The world is a cluttered, noisy place, and the ability to effectively focus is a valuable skill. Researchers at JQI have identified a new way to focus their attention and obtain useful insights into the way information associated with a configuration of interacting particles gets dispersed and effectively lost over time. Their technique focuses on a single feature that describes how various amounts of energy can be held by different configurations a quantum system. The approach provides insight into how a collection of quantum particles can evolve without the researchers having to grapple with the intricacies of the interactions that make the system change over time.

Microscopic and Emergent Dynamics of Quantum Information Flows

Submitted by mbritton on

Abstract: The past fifty years of scientific and technological progress have clearly highlighted information as a physical resource - one that can be traded for heat, work, and other energetic resources. With the ongoing new wave of quantum-based technologies, understanding the microscopic and emergent dynamics of quantum information in many-body quantum systems has thus become a priority.

Ferromagnetism in the Hubbard Model: Squares, Rings and More

Submitted by mbritton on

Abstract: Nagaoka ferromagnetism (NF) is a long-predicted example of itinerant ferromagnetism in the Hubbard model and has been studied theoretically for many years. NF occurs when there is one hole in a half-filled band and a large onsite Coulomb repulsion, which does not arise naturally in materials. Quantum dots systems like dopant arrays in Si, can be fabricated with atomically precise complex geometries to create highly controllable systems. This makes them good candidates to study itinerant ferromagnetism in different array geometries.

Towards a Renormalization Group scheme for field theories on loops

Submitted by mbritton on

Abstract: Theories whose fluctuating degrees of freedom live on extended loops as opposed to points, are abundant in nature. One example is the action obtained upon eliminating the redundant gauge fields in a gauge theory. Formulating a Renormalization Group (RG) procedure for such a theory is an open problem. In this work, we outline a procedure that in principle computes the outcome of coarse-graining and rescaling of such a theory. We make estimates that lead to qualitative agreement with known results of phase transitions in gauge theories and the XY-model.

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