Junghoon Lee

Oct 18, 2024 | digitalcommons.library.tmc.edu | Xiaoxuan Zhang |Wojciech Zbijewski |Junghoon Lee |Alejandro Sisniega

BACKGROUND: Image-guided neurosurgery requires high localization and registration accuracy to enable effective treatment and avoid complications. However, accurate neuronavigation based on preoperative magnetic resonance (MR) or computed tomography (CT) images is challenged by brain deformation occurring during the surgical intervention.

Aug 8, 2024 | link.aps.org | Jongmin Kim |Junghoon Lee |Deokhwa Hong |Jongheum Jung

We present a turbulence-sustaining mechanism in a spinor Bose-Einstein condensate, which is based on the chaotic nature of internal spin dynamics. Magnetic driving induces a complete chaotic evolution of the local spin state, thereby continuously randomizing the spin texture of the condensate to maintain the turbulent state.

Oct 24, 2023 | link.aps.org | Jong Heum Jung |Junghoon Lee |Jongmin Kim |Y. C. Shin

We numerically investigate the stationary turbulent states of spin-1 Bose-Einstein condensates under continuous spin driving. We analyze the entanglement entropy and magnetization correlation function to demonstrate the isotropic nature of the intricate spin texture that is generated in the nonequilibrium steady state. We observe a −7/3 power-law behavior in the spin-dependent interaction energy spectrum.

Jul 27, 2023 | link.aps.org | Junghoon Lee |Jongmin Kim |Jong Heum Jung |Deokhwa Hong

Abstract We report the observation of stationary turbulence in antiferromagnetic spin-1 Bose-Einstein condensates driven by a radio-frequency magnetic field. The magnetic driving injects energy into the system by spin rotation and the energy is dissipated via dynamic instability, resulting in the emergence of an irregular spin texture in the condensate.