Center for Relativistic Laser Science

   IBS Center for Molecular Spectroscopy and Dynamics

n  SPEAKER
Prof. Han Seb Moon (Department of Physics, Pusan National University)

n  TITLE
Programmable multidimensional quantum states via space-division multiplexing of a long-coherent single photon from a warm ⁸⁷Rb atomic ensemble

n  ABSTRACT
 The high-dimensional encoding of single photons can offer various possibilities for enhancing quantum information processing. This work experimentally demonstrates the quantum interference of an engineered multidimensional quantum state through the space-division multiplexing of a heralded single-photon state with a spatial light modulator (SLM) and spatial-mode mixing of a single photon through a long multimode fiber (MMF). In our experiment, the heralded single photon generated from a warm 87Rb atomic ensemble was bright, robust, and long-coherent. The programmable multidimensional spatial quantum state of the long-coherent single photon was transported through a 4-m-long MMF and arbitrarily controlled using the SLM. We observed the quantum interference of a single-photon multidimensional spatial quantum state with a visibility of >95%. These results may have potential applications in quantum information processing, for example, in photonic variational quantum eigensolve with high-dimensional single photons and realizing high information capacity per photon for quantum communication.

n  DATE AND VENUE
November 15, 2022 (Tuesday, 16:00 - 17:00)  

Seminar Room A (116)

n  LANGUAGE
Korean

n  INVITED BY
Associate Director Wonshik Choi