Junqi Wang's Homepage

My interests cover cosmology, high energy theory and quantum science. I am trying to work at the intersection and find connections between them. Recently, I am working on/interested in the following areas.

1 Quantum Cosmology

This is the main topic of my thesis, we are trying to understand the quantum features and relics of the primordial fluctuation during the inflation. For more information, please refer my publication.

2 New proposals to fundamental physics

a. Cosmological Collider Physics

This is the main topic of my advisor Yi Wang's Group. Early universe is a natural lab for high energy process, cosmological collider physics suggest we can find the signal of these processes from the statistics of the large scale structure mostly the shape of the three-point function. People are trying to develop new methods (Bootstrap, Mellin transformation, etc.) to calculate these correlators in de Sitter spacetime.

b. New Tabletop experiment

Increasing the energy level on the traditional collider has been a trend for several decades. However, we are now facing more and more challenges on energy, environment, and money to build larger collider. On the other hand, collider is also not good at searching some kinds of particles such as axion and axion-like particles (the candidates for dark matter). With developed techniques in quantum metrology and sensing we can have very precise measurement with a tabletop instrument. It is interesting to make use of these knowledges to propose new experiment for beyond Standard Model physics and quantum gravity. 

3 Quantum Information/Computing + Quantum Field Theory

From both technical and conceptual sides, the intersection between QI/QC and QFT is really promising. Conceptually, quantum information provides a different view like the chaos property of the gravity. Technically, some ideas of quantum error correction inspired by quantum many body systems. I’m interested in finding more connections among them and hope to see if HEP ideas and techniques can be helpful for Noisy Intermediate-Scale Quantum (NISQ) quantum computing.