S-自旋二聚体分子磁体的纠缠温度

Entangled state teleportation through a couple of quantum channels composed of XXZ dimers in an Ising-XXZ diamond chain

The quantum teleportation plays an important role in quantum information process, in this sense, the quantum entanglement properties involving an infinite chain structure is quite remarkable because real materials could be well represented by an infinite chain. We study the teleportation of an entangled state through a couple of quantum channels, composed by Heisenberg dimers in an infinite Ising-Heisenberg diamond chain, the couple of chains are considered sufciently far away from each other to be ignored the any interaction between them . To teleporting a couple of qubits through the quantum…

Dimer chains in waveguide quantum electrodynamics

We examine the propagation of single photons in periodic and disordered dimer chains coupled to one-dimensional chiral and bidirectional waveguides. Each dimer is composed of two dipole-coupled atoms. In the disordered setting, we separately treat two types of position disorder, namely in dimer length and in dimer separation. The focus of this study is to understand in what ways the interplay between dipole-dipole interactions and directionality of photon emission can impact the transport of single photons. Cold atoms trapped near optical fibers can serve as an experimentally realizable platfo…

Quantum Phase Transition in Dimerized Spin-1/2 Chains

Quantum phase transition in dimerized antiferromagnetic Heisenberg spin chain has been studied. A staircase structure in the variation of concurrence within strongly coupled pairs with that of external magnetic field has been observed indicating multiple critical points. Emergence of entanglement due to external magnetic field or magnetic entanglement is observed for weakly coupled spin pairs in the same dimer chain. Though closed dimerized isotropic XXX Heisenberg chains with different dimer strengths were mainly explored, analogous studies on open chains as well as closed anisotropic (XX int…

分子二聚体中的多参数量子计量学

Multiparameter Quantum Metrology in Molecular Dimers

研究分子二聚体中温度\(T\)和失谐\(\Lambda\)的多参数量子估计，采用矢量化方法推导量子费希尔信息矩阵分析精度极限，发现近共振和低温时同时估计更优，温度是关键控制参数，凸显分子量子系统用于多参数量子传感的潜力。

Scars from protected zero modes and beyond in $U(1)$ quantum link and quantum dimer models

We demonstrate the presence of anomalous high-energy eigenstates, or many-body scars, in $U(1)$ quantum link and quantum dimer models on square and rectangular lattices. In particular, we consider the paradigmatic Rokhsar-Kivelson Hamiltonian $H=\mathcal{O}_{\mathrm{kin}} + λ\mathcal{O}_{\mathrm{pot}}$ where $\mathcal{O}_{\mathrm{pot}}$ ($\mathcal{O}_{\mathrm{kin}}$) is defined as a sum of terms on elementary plaquettes that are diagonal (off-diagonal) in the computational basis. Both these interacting models possess an exponentially large number of mid-spectrum zero modes in system size at $λ…

氦纳米液滴上形成的高自旋钠二聚体的磁偏转

Magnetic deflection of high-spin sodium dimers formed on helium nanodroplets

该研究通过测量掺钠氦纳米液滴束的 Stern-Gerlach 磁偏转，证实液滴表面存在丰富的高磁矩自旋三重态钠二聚体，且其电子自旋可被外磁场完全取向。