Job Title: Professor
School/Institute:State Key Lab of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan
E-mail: zhaoyt@sxu.edu.cn
Tel: +86-0351-7113828
Biography
ZHAO Yanting is a professor and doctoral advisor at State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University. His research interests include ultracold atoms and molecules, quantum information and quantum computing, nanofiber optics, atomic BEC.
Education:
[1] 2000.09 to 2005.07
Shanxi University, State Key Lab of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Optics, Doctoral degree.
[2] 1995.09 to 1999.07
Shanxi University, Department of Physics, Bachelor of Physics.
Research Area:
Ultracold atomic molecules have extremely low temperatures and long coherence times, and can be manipulated by a variety of optical, electrical, magnetic and other methods, making them an excellent platform for conducting quantum state control and quantum information science research. Our research group has built three experimental platforms: Light-atom interaction based on nanofibers, Ultracold single atom-molecule manipulation based on optical tweezers technology, and Quantum simulation based on atomic BEC.
1. Light-atom interaction based on nanofibers
The interaction between light and atoms is a major research topic in the fields of quantum optics and atomic physics. The atomic interactions achieved through electromagnetic fields can be widely used in various fields such as basic scientific research and practical applications. The implementation of these applications benefits from several major characteristics of the experimental system, mainly including the high coupling efficiency between light and atoms, the capture and manipulation of atomic ensembles, and the localization and manipulation of electromagnetic fields. Optical waveguides provide a suitable platform for achieving these system characteristics, and optical nanofibers are an excellent choice in optical waveguide solutions. The nanofiber is a tapered fiber with a length of centimeters and a diameter of sub micrometers, which is pulled from a standard single-mode fiber. Using nanofibers, the electromagnetic field is strongly bound near the surface of the fiber to form an evanescent field, which improves the coupling rate between light and atoms. The interaction between atoms is achieved through waveguide light, and atoms can also be captured near the surface of the nanofiber through the evanescent field. The strongly bound electromagnetic waves on the surface of nanofibers interact nonlinearly with atomic arrays captured by the optical lattice, and can be used for realization such as optical diodes, superradiance, quantum multibody, and wavefront effects.
2. Optomechanical cooling based on nanofibers
During the interaction between light and atoms, the phase and polarization stability of the nanofiber waveguide light have a significant impact on the final measurement. Therefore, the research of the thermal noise characteristics of nanofibers is particularly important. The strong binding evanescent field on the fiber surface provides an ideal platform for the study of optomechanical coupling effects. We know that linearly polarized light can generate a twisting force on a birefringent object when it passes through it, and its principle is hidden in the Maxwell equation. It was proposed by Poynting et al. and later confirmed experimentally by Beth and Holbourn et al., and this effect is important for optomechanical coupling applications. A milestone application example is the use of momentum transfer between light and objects to reduce mechanical vibrations of moving objects, also known as optomechanical cooling.
The thermal radiation of nanofibers can cause torsional mode vibration. When linearly polarized light passes through nanofibers with birefringence characteristics, torsional force is generated on them. Through the feedback of photo induced torsional force, we have observed the cooling phenomenon in torsional optomechanical systems, achieving the cooling of macroscopic objects by light.
3. Ultracold single atom-molecule experimental platform based on optical tweezers technology
The second quantum technology revolution, based on the superposition and non-locality in quantum systems, includes technologies such as quantum computing, quantum simulation, quantum communication, and quantum sensing. It can break through the physical limits of existing information technology and is expected to trigger a disruptive change in information technology, leading a new round of technological and industrial revolution. The key is to manipulate and detect the unique quantum properties of individual quantum systems (such as atoms, molecules, electrons, photons).
The optical tweezers technology, known for winning the 2018 Nobel Prize, has the ability to manipulate and measure micro and nano particles. It can complete the preparation of individual ultracold atomic-molecules and the manipulation of internal and external full quantum states. The extended editable arbitrary configuration optical tweezers array can prepare ultracold atomic-molecule quantum bits for quantum computing and simulation.
4. Quantum simulation experimental platform based on atomic BEC
We use an all-optical method to prepare 87Rb spin BEC. During the evaporation process, BEC is prepared into a pure spin state by applying a magnetic field. After the preparation of BEC, transitions between different spin states and hyperfine states were achieved using radio frequency coils, microwave horns, and Raman transitions. Based on these methods, we can investigate the spin Hall effect in quantum gases and quantum correlation and manipulation in non-Hermitian systems. Recently, we experimentally realize an exceptional nexus based on dissipative BEC of 87Rb atoms. A crucial novelty of our platform is that tunable dissipation exhibits prominent density dependence, arising from the collective response of atoms to resonant light.
Employment:
[1] 2016.12-Now: Institute of Laser Spectroscopy, Shanxi University, Professor
[2] 2008.06-2016.12: Institute of Laser Spectroscopy, Shanxi University, Associate Professor
[3] 2005.08-2007.08: Joint Quantum Institute, Department of Physics, University of Maryland, Post-doctoral
Selective Publications：
36. “Exceptional Nexus in Bose-Einstein Condensates with Collective Dissipation”, Physical review letters, to be published
35. “Narrow laser linewidth measurement with the optimal demodulated Lorentzian spectrum”, Applied Optics, 63, 1847(2024)
34. “Optomechanical feedback cooling of a 5 mm long torsional mode”, Photonics Research, 11, 2179(2023)
33. “Dynamical beats of short pulses in waveguide QED”, Physical review research 5, L042041(2023)
32. “Composite Picosecond Control of Atomic States through a Nanofiber Interface”, Physical review applied, 20, 024041(2023)
31. “Tunable laser frequency lock based on a temperature-dependent Fabry–Perot etalon”, Applied Optics, 61, 5381(2022)
30. “Dark state atoms trapping in a magic-wavelength optical lattice near the nanofiber surface” , Chinese Optics Letters 20(2) , 020201 (2022)
29. “Torsional optomechanical cooling of a nanofiber”, Photonics Research, 10, 601(2022)
28. “Microwave-assisted coherent control of ultracold polar molecules in a ladder-type configuration of rotational states”, Phys. Chem. Chem. Phys., 23, 4271(2021)
27. “Measurement of the permanent electric dipole moment of ultracold ground state 85Rb133Cs molecules by microwave coherent spectroscopy”, Optics Express, 29, 1558(2021)
26. “Radiative lifetime measurement of ultracold cesium Rydberg states by a simplified optical pumping method”, Applied Optics, 60, 276(2021)
25. “Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation”, Phys. Chem. Chem. Phys., 22, 13002(2020)
24. “Resonance enhanced two-photon ionization spectrum of ultracold 85 Rb133 Cs molecules in (2)1Π1←X1Ʃ+transitions”, Journal of Quantitative Spectroscopy & Radiative Transfer 34,107215(2020)
23. “Production of ultracold 85Rb133Cs molecules in the lowest ground state via the B1Π1 short-range state”, J. Chem. Phys. 151, 084303 (2019)
22. “A simple, low cost and robust method for measurement of the zero crossing temperature of an ultralow expansion cavity”, J. Phys. D: Appl. Phys., 52, 455104(2019)
21. “Observation of ladder-type electromagnetically induced transparency with atomic optical lattices near a nanofiber”, New J. Phys., 21, 043053(2019)
20. “Extensive high-resolution photoassociation spectra and perturbation analysis of the 2(0−) long-range state of ultracold RbCs molecules”, Physical review A 99, 042513 (2019)
19. “Non-crossover sub-Doppler DAVLL in selective reflection scheme”, Chin. Phys. B 28, 084211(2019)
18. “Electromagnetically induced transparency at optical nanofiber–cesium vapor interface”, Chin. Phys. B 28, 124201(2019)
17. “Absorption saturation measurement using the tapered optical nanofiber in a hot cesium vapor”, Chinese optics letters, 17(3), 031901(2019)
16. “Laser frequency stabilization in sub-nanowatt level using nanofibers”, J. Phys. D: Appl. Phys., 51,465001(2018)
15. “Candidates for direct laser cooling of diatomic molecules with the simplest 1Σ-1Σelectronic system”, Physical review A 97, 062501(2018)
14. “A dynamical process of optically trapped singlet ground state 85Rb133Cs molecules produced via short-range photoassociation”, Phys. Chem. Chem. Phys., 20,4893(2018)
13. “Microwave spectroscopy measurement of ultracold ground state molecules produced via short-range photoassociation”, Optics express, 26, 2341(2018)
12. “Pump–probe and Four-wave Mixing Spectra Arising from Recoil-induced Resonance in an Operating Cesium Magneto-Optical Trap”, J. Phys. Soc. Jpn., 87, 024301 (2018)
11. “Rotational Population Measurement of Ultracold 85Rb133Cs Molecules in the Lowest Vibrational Ground State”, Chin. Phys. Lett., 34,103301(2017)
10. “Optical Dipole Trap for Ultracold Atoms Loaded from Dark SPOT”, J. Phys. Soc. Jpn,, 85 ,104301(5)(2016)
9. “Experimental study of the (4)0- short-range electronic state of the 85Rb133Cs molecule by high resolution photoassociation spectroscopy”, Journal of Quantitative Spectroscopy & Radiative Transfer, 184, 8–13(2016)
8. “Detection of Ultracold Ground-State Molecules by One- and Two-Color Resonance-Enhanced Two-Photon Ionization”, J. Phys. Soc. Jpn. 85, 084301 (2016)
7. “Nonlinear selective reflection spectroscopy of V-type atomic system at the gas-solid interface”, Annalen Der Physik, 528（6）,512-518 (2016)
6. “Hyperfine dipole-dipole broadening of selective reflection spectroscopy at the gas-solid interface”, EPL, 115,63001(6) (2016)
5. “Excitation Dependence of Dipole–Dipole Broadening in Selective Reflection Spectroscopy”, Chin. Phys. Lett, 33(11), 113202(4) (2016)
4. “The determination of potential energy curve and dipole moment of the (5)0+ electronic state of 85Rb133Cs molecule by high resolution photoassociation spectroscopy”, J. Chem. Phys. 143,224312 (2015)
3. “Investigation on ultracold RbCs molecules in (2)0+ long-range state below the Rb(5S1/2) + Cs(6P1/2) asymptote by high resolution photoassociation spectroscopy”, J. Chem. Phys. 143,044311 (2015)
2. “Photoionization spectrum of 85RbCs molecules produced by short range photoassociation”, Journal of Quantitative Spectroscopy &Radiative Transfer 166, 36–41, (2015)
1. “Space-adjustable dark magneto-optical trap for efficient production of heteronuclear molecules”, COL 13, 110201(2015)
