9 papers
Every Rank-2 Bipartite Entangled State is Projectively Steerable
Yu-Xuan Zhang, Jing-Ling Chen
We prove that every rank-2 bipartite entangled state is already steerable with projective measurements, closing the first possible gap between entanglement and Einstein-Podolsky-Ro…
The Quantum Hamming Bound in Arbitrary Local Dimension
Yu-Xuan Zhang, Jing-Ling Chen
The quantum Hamming bound is the finite-length sphere-packing count for exact quantum error correction: the code dimension times the number of correctable local error patterns must…
Degeneracy Cannot Violate the Quantum Hamming Bound
Yu-Xuan Zhang, Jing-Ling Chen
The quantum Hamming bound is the standard finite-length sphere-packing bound for exact correction of arbitrary qubit errors. Whether degeneracy can evade this bound has remained un…
Exactly Solvable Quantum Model with Spin-Dependent Coulomb Interaction
Jiang-Lin Zhou, Yu-Xuan Zhang, Choo Hiap Oh +1
In this work, we report an exactly solvable quantum model featuring a spin-dependent Coulomb interaction, described by the spin vector potential \(\vec{\mathcal{A}} = k (\vec{r} \t…
Exact Solutions of the SU(2) Yang-Mills Equations from a Static Ansatz
Yu-Xuan Zhang, Jing-Ling Chen
We present a systematic study of static solutions to the source-free SU(2) Yang-Mills equations, in which the gauge potential explicitly depends on spin operators. By employing the…
Exact SU(2) Yang-Mills Waves from a Simple Ansatz
Yu-Xuan Zhang, Jing-Ling Chen
We propose a simple ansatz that reduces the sourceless SU(2) Yang--Mills equations in (3+1) dimensions to nine algebraic constraints. Solving these constraints yields three closed-…