RQC Seminar

115th RQC Seminar

• Speaker

  Mr. Enze Li
  ( University of science and technology of China )

• Date

  13:30-14:30, April 24, 2024 (Wednesday)

• Venue

  Hybrid(ZOOM・ Wako Main Research 3F 345-347 Seminar Room/ 研究本館3階 セミナー室(345-347) C01）

• Title

  Photonic qubit unidirectional router and spin-wave diode

• Inquiries

  rqc_info[at]ml.riken.jp

Abstract
The efficient unidirectional routing of photonic qubits plays a pivotal role in both classical and quantum information processing domains. However, synthesizing qubit unidirectional router and spin-wave diode remains elusive. Here, the multi-level neutral cold atoms can mediate both dissipative and coherent couplings. Interestingly, this method can be investigated and practically implemented in experiments, successfully synthesizing a system with dual functionality as both a photonic qubit unidirectional router and a spin-wave diode. The coherent coupling and dissipative channel can be effectively balanced by manipulating the helicity of the field, thereby ensuring the unidirectional transfer of photonic qubits. Furthermore, the spin-wave diode can effectively achieve unidirectional information transfer by appropriately setting the coherent coupling parameters. This method enables the establishment of extensive quantum networks and serves as a pivotal component in chiral topological photonics, chiral networks, and unidirectional quantum information transfer.