Authors

Xi Chen

Publications 13

Preprint Open access

LVSPM: Long Sequence View Synthesis and Pose Estimation Model

Xi Chen, Yachi Zhang, Linghao Chen et al. · 2026

We present LVSPM, a generalizable model that jointly estimates camera poses and synthesizes novel views from uncalibrated image collections. Trained with only RGB images and pose supervision, LVSPM avoids dense 3D ground truth and employs test-time training (TTT) layers to scale seamlessly to hundreds of input views. O …

Preprint Open access

Inertial Counterdiabatic Driving

We introduce an inertial counterdiabatic (CD) protocol that reformulates shortcut-to-adiabaticity design as a moving-frame diagonalization problem. The method employs the Magnus expansion to construct a variational propagator generated by an accessible CD ansatz. In the new rotating frame, the controls are optimized to …

Preprint Open access

Can a Robot Read Braille? - Learning to Adapt Contact via Imitation Learning for Tactile Braille Recognition

Xi Chen, Yunlong Shan, Sihan Chen et al. · 2026

For people who are blind, touch provides an essen-tial channel for accessing written information through Braille. Bringing a similar capability to robots requires them not only to recognize tactile patterns, but also to actively establish physical contact that makes those patterns readable. Yet existing robotic Braille …

Preprint Open access

A Zeroth-Order Paradigm for LLM Preference Alignment

Peter Chen, Xi Chen, Wotao Yin et al. · 2026

Direct preference alignment methods are widely used to align large language models (LLMs) with human preferences because of their computational and memory efficiency. However, likelihood displacement motivates alternative ways to extract information from preference pairs with small likelihood margins. In this paper, we …

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