Publications (16)
PERM: Psychology-grounded Empathetic Reward Modeling for Large Language Models
Chengbing Wang, Wuqiang Zheng, Yang Zhang +5
Large Language Models (LLMs) are increasingly deployed in human-centric applications, yet they often fail to provide substantive emotional support. While Reinforcement Learning (RL…
Transport Barrier and Spinning Blob Dynamics in the Tokamak Edge
Junyi Cheng, James Myra, Seung-Hoe Ku +3
In this work, we investigate the dynamics of plasma blobs in the edge of magnetic confinement devices using a full-f gyrokinetic particle-in-cell code with X-point geometry. In sim…
A Step in Flux to Suppress Axion Isocurvature
Priyesh Chakraborty, Junyi Cheng, Matthew Reece +1
The QCD axion in the pre-inflation scenario faces a stringent isocurvature constraint, which requires a relatively low Hubble scale during inflation. If the axion was heavier than…
A coherent structure transport model for scrape-off layer turbulence
Zhichen Feng, James Myra, Junyi Cheng +5
Understanding the locality of high-temperature plasma energy deposition on material surfaces in fusion reactors is critical for design. Here, we utilize the Gyrokinetic ElectroMagn…
Global simulations of kinetic-magnetohydrodynamic processes with energetic electrons in tokamak plasmas
Jian Bao, Wenlu Zhang, Ding Li +7
The energetic electrons (EEs) generated through auxiliary heating have been found to destabilize various Alfven eigenmodes (AEs) in recent experiments, which in turn lead to the EE…
Which Metric on the Space of Collider Events?
Tianji Cai, Junyi Cheng, Katy Craig +1
Which is the best metric for the space of collider events? Motivated by the success of the Energy Mover's Distance in characterizing collider events, we explore the larger space of…
From Empathy to Personalized Empathy: Adapting Empathetic Strategies to Individual Users
Wuqiang Zheng, Chengbing Wang, Yilin Yang +6
As Large Language Models (LLMs) are increasingly deployed in long-term interactions with users, empathy has become an increasingly important capability. However, existing research…
MAS: A versatile Landau-fluid eigenvalue code for plasma stability analysis in general geometry
Jian Bao, Wenlu Zhang, Ding Li +8
We have developed a new global eigenvalue code, Multiscale Analysis for plasma Stabilities (MAS), for studying plasma problems with wave toroidal mode number n and frequency omega…
The Linearized Hellinger--Kantorovich Distance
Tianji Cai, Junyi Cheng, Bernhard Schmitzer +1
In this paper we study the local linearization of the Hellinger--Kantorovich distance via its Riemannian structure. We give explicit expressions for the logarithmic and exponential…
The Muon Smasher's Guide
Hind Al Ali, Nima Arkani-Hamed, Ian Banta +31
We lay out a comprehensive physics case for a future high-energy muon collider, exploring a range of collision energies (from 1 to 100 TeV) and luminosities. We highlight the advan…
Limits on an Exotic Higgs Decay From a Recast ATLAS Four-Lepton Analysis
Junyi Cheng, Rabia Husain, Lingfeng Li +1
The ATLAS collaboration, using 139 fb of 13 TeV collisions from the Large Hadron Collider, has placed limits on the decay of a boson to three dark photons. We reproduce…
An unsupervised approach for semantic place annotation of trajectories based on the prior probability
Junyi Cheng, Xianfeng Zhang, Peng Luo +2
Semantic place annotation can provide individual semantics, which can be of great help in the field of trajectory data mining. Most existing methods rely on annotated or external d…
Universality in the Axiverse
Junyi Cheng, Naomi Gendler
Studies of axion effective theories in the type IIB Calabi-Yau landscape have revealed that hierarchies in cycle volumes drive correlations between axion physics and the number of…
The Phase Space Distance Between Collider Events
Tianji Cai, Junyi Cheng, Nathaniel Craig +2
How can one fully harness the power of physics encoded in relativistic -body phase space? Topologically, phase space is isomorphic to the product space of a simplex and a hypers…
A New Paradigm for Fast and Repetitive Chirping of Alfvén Eigenmodes
Junyi Cheng, Wenlu Zhang, Zhihong Lin +4
A novel 2D nonlinear dynamical paradigm is constructed to interpret the fast and repetitive frequency chirping and amplitude oscillation of Alfvén eigenmodes excited by energetic…
Linearized Optimal Transport for Collider Events
Tianji Cai, Junyi Cheng, Katy Craig +1
We introduce an efficient framework for computing the distance between collider events using the tools of Linearized Optimal Transport (LOT). This preserves many of the advantages…