5 papers
Many-body Josephson diode effect in superconducting quantum interferometers
Zelei Zhang, Jianxiong Zhai, Yi Zhang +1
We propose a many-body mechanism for a strong Josephson diode effect (JDE) in an interacting nanoscale SQUID formed by two parallel quantum dots coupled to superconducting leads. U…
The impact of dimensionality on universality of quantum Hall transitions
Qiwei Wan, Yi Zhang
Regardless of model and platform details, the critical phenomena exhibit universal behaviors that are remarkably consistent across various experiments and theories, resulting in a…
Self-consistent effective field theory to nonuniversal Lee-Huang-Yang term in quantum droplets
Yi Zhang, Xiaoran Ye, Ziheng Zhou +1
Quantum droplets (QDs) in weakly interacting ultracold quantum gases are typically characterized by mean-field theories incorporating Lee-Huang-Yang (LHY) quantum fluctuations unde…
Tuning spin-density separation via finite-range interactions: Dimensionality-driven signatures in dynamic structure factors
Xiaoran Ye, Yi Zhang, Ziheng Zhou +1
Spin-density (charge) separation, marked by distinct propagation velocities of spin and density excitations, epitomizes strong correlations, historically confined to one-dimensiona…
Cornwall-Jackiw-Tomboulis effective field theory to nonuniversal equation of state of an ultracold Bose gas
Yi Zhang, Zhaoxin Liang
The equation of state (EOS) serves as a cornerstone in elucidating the properties of quantum many-body systems. A recent highlight along this research line consists of the derivati…