41 citations · 58 across the 3 of their papers we have counts for
5 papers · 1 filter
Even-Odd effect of an Spin-S impurity coupled to a quantum critical system
Kun Chen, Yashar Komijani
We discuss an even-odd effect for an impurity with an -fold degenerate internal states immersed in a two-dimensional superfluid--Mott-insulator quantum critical bath, which is d…
Feynman's solution of the quintessential problem in solid state physics
Kun Chen, Kristjan Haule
Two of the most influential ideas developed by Richard Feynman are the Feynman diagram technique and his variational approach. The former provides a powerful tool to construct a sy…
Quantized Magnetic Flux and the Magneto-halon Effect in a Critical Superconductor
Kun Chen, Boris Svistunov
Employing the standard worldline-vortex mapping, we conclude that at the critical temperature, superconductors demonstrate the magneto-halon effect with respect to the quantized ne…
The halon: a quasiparticle featuring critical charge fractionalization
Kun Chen, Yuan Huang, Youjin Deng +1
The halon is a special critical state of an impurity in a quantum-critical environment. The hallmark of the halon physics is that a well-defined integer charge gets fractionalized…
Trapping Collapse
Kun Chen, Nikolay V. Prokof'ev, Boris V. Svistunov
Weak potential wells (or traps) in one and two dimensions, and the potential wells slightly deeper than the critical ones in three dimensions, feature shallow bound states with loc…