visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2024-10-17 16:00 
일시 10월 17일 오후 4시 
장소 온라인 (https://kaist.zoom.us/j/89289652931?pwd=eNz6xnTFrEMGXYj9fXpdBJsW9fEpJX.1) 
연사 이무성 박사 (Universität Stuttgart, Germany) 
초록:
Quantum levitodynamics is an exciting new direction in quantum optomechanics, where optically trapped particles in high vacuum serve as exceptional mechanical oscillators with high quality factors and stiffness. Current research enables quantum-limited detection and control of an optically trapped nanoparticle, whose possible applications would range from macroscopic quantum tests to precision sensing. Scaling up particle sizes could unlock the limit of macroscopic quantum applications, but conventional optical theories and methods face significant limitations to the Rayleigh regime, where particle size is much smaller than the wavelength of light.
 
In this seminar, I present photonic approaches to achieve quantum optical control of optically trapped particles beyond the Rayleigh regime and for picogram-scale masses. First, I outline the theoretical limitations of traditional Rayleigh scattering and Gaussian beam models. I challenge this by introducing analytical and numerical methods, including the vectorial angular spectrum method and modified Born series, for accurate and efficient light scattering computation beyond conventional approaches. Second, particles larger than the Rayleigh regime exhibit lower detection efficiencies and reduced trap stiffness due to multiple scattering, hindering optimal quantum control. To address this, I apply an adjoint method for optimized light generation and customized diffractive lenses to enhance trap stiffness and detection efficiency. The successful implementation will potentially open a new avenue for matter-wave experiments with masses eight orders of magnitude larger than current records.
번호 날짜 장소 제목
566 2024-10-31 13:00  E6-2 / Rm. 3441  Mini-workshop on first-principles DFT methods and applications
565 2024-10-30 14:30  E6-2, #3441  [Seminar Invitation] Mario Cuoco (CNR-SPIN, c/o University of Salerno, Fisciano, Italy) / 2024.10.30. 14:30 / E6-2, #3441
564 2024-10-21 13:00  E6-2 #3441  [Physics Seminar] “Non-Hermitian Point-Gap Topology in Junction Systems” file
» 2024-10-17 16:00  온라인 (https://kaist.zoom.us/j/89289652931?pwd=eNz6xnTFrEMGXYj9fXpdBJsW9fEpJX.1)  Photonic Methods for Quantum Levitodynamics Beyond the Rayleigh Regime
562 2024-10-14 11:00  KI Building(E4), Matrix Hall(2nd Floor)  [RSVP, Oct 14th Mon] Ambassador of Hungary to Republic of Korea Special Lecture file
561 2024-10-02 12:00  E6-2, #3441  Data-driven discovery of neural computations through brain-wide and cell-type-specific dynamical systems file
560 2024-09-26 14:00  KAIST, Physics Bldg. (E6-2) / (Rm. 3441)  Quantum spin nematic phase in a square-lattice iridate
559 2024-09-03 12:00  자연과학동(E6-2) 1323  2024 가을학기 물리학과 특별세미나 전체 일정 (응집물리 및 광학분야) file
558 2024-09-02 16:00  자연과학동 1501호(공동강의실)  2024학년도 가을학기 물리학과 콜로키움(Physics Colloquium) file
557 2024-08-22 16:00  RM #C303, Creation Hall (3F), KAIST Munji Campus  [CAPP seminar] Development of a 12-20 GHz CO Intensity Mapping Receiver for Capturing the Star-formation History in the Early Universe file
556 2024-08-16 11:00  E6 1322 (no zoom broadcasting)  Cathodoluminescence for nanophotonics: Applications to plasmonic bandgap materials and perovskite semiconductors file
555 2024-08-14 11:00  E6, #3441  Pair Density Waves and Supercurrent Diode Effect in Altermagnets
554 2024-07-25 16:00  Rm. 3441, E6-2 (Advanced Physics Lecture Hall)  Generation and Certification of Optical Quantum States for Information Processing file
553 2024-07-23 16:00  KI Building(E4) Matrix Hall(2F)  Spin Conversion Research Towards Novel Spintronic Functionalities file
552 2024-07-22 14:00  E6-2 #3441  Nonthermal electronic orders in photo-doped Mott insulators
551 2024-07-18 11:00  E6-2 #1323  Acousto-electric non-local detection of magnon-phonon coupling
550 2024-07-10 16:00  E6-2 #2502  [High Energy Theory Seminar] The Weak Gravity Conjecture in Perturbative String Theory
549 2024-07-03 16:00  E6-2 #2502  [High Energy Theory Seminar] Holographic duals of Higgsed Dpb(BCD)
548 2024-06-13 16:00  E6-2, #1323  Magnonic $\varphi$ Josephson junction and its non-Hermitian Josephson diode effect
547 2024-06-13 16:00  Zoom  [CAPP seminars]Simulation, design and fabrication of Josephson Parametric Amplifiers for axion search file