Ziyu He

Ziyu He

Undergraduate committed to exploring quantum phenomena, passionate about contributing to the field of quantum technology.

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Teaching experience 1

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Teaching experience 2

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Research

Tunable Quantum Router in a Dual-Rail Quantum Network via Giant Atom

Under the guidance of Prof. Zeliang Xiang, we have theoretically designed a tunable quantum router using a three-level giant atom embedded in a dual-rail waveguide. By calculating the scattering properties for incident photons, we demonstrated that this configuration enables high-fidelity quantum routing, quantum gates, and quantum circulators—all achievable by tuning the coupling parameters. These advances contribute significantly to the development of quantum networks.

Numerical Study of Quantum Pulse Interaction with Localized Quantum Systems

Under the guidance of Prof. Zeliang Xiang, I employed the approach proposed by Alexander Holm Kiilerich and Klaus Mølmer to study the interactions between incident light in various quantum states and localized quantum systems within a waveguide. By reproducing their work on pulse shaping of a cavity with phase noise and generating a flying cat state, I contributed to advancing techniques in quantum control of emitter. This work was presented to an experimental group for further application.

Analytical and Numerical Study of Photons in Nonlinear Waveguides

In collaboration with Prof. Xueyue (Sherry) Zhang, I investigated nonlinear waveguides composed of nonlinear coupled cavity arrays. Inspired by previous work, I reproduced calculations of two-photon bound states. Further, I explored utilizing this nonlinear interaction to generate driven-dissipative cat states and investigated the formation of entangled cat states.

Fitting the Time-of-Flight (ToF) of Quasi-2D Ultracold Er 166 Atoms

Under the guidance of Prof. Gyu-Boong Jo, I developed fitting scripts to determine the sample’s temperature and chemical potential. By employing the Hartree-Fock (HF) method, we iteratively calculated the occupation distribution of interacting atoms, enabling the computation of their spatial distribution. The theoretical results were then compared and fitted against experimental data to enhance our understanding of the sample’s properties.

Experimental Survey of Giant Atom in Superconducting Circuits

In a giant atom project, we conducted experiments on a transmon qubit capacitively coupled at two distinct points to a coplanar waveguide. I calibrated the transmon frequency and analyzed its relationship with the Z line bias using dispersive readout techniques in this ongoing project.

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