Fig. 1. Schematic of Fabry-Perot cavity
[30].
Fig. 2. Cavity optomechanical systems with different mecha-nical vibration frequencies and masses
[39].
Fig. 3. Schematic of Fabry-Perot interferometer.
Fig. 4. Schematic of proposal from Vitali’s group
[43].
Fig. 5. Schematic of proposal from Bitarafan
[45].
Fig. 6. Experimental setup of F-P cavity with levitated particle
[47].
Fig. 7. Illustration of whispering gallery mode.
Fig. 8. (a) Structures of the first whispering gallery mode cavity
[48]; (b) its enhanced version
[49].
Fig. 9. Schematic of whispering gallery mode cavity formed by fiber taper and polymer wire
[51].
Fig. 10. Schematic of whispering gallery mode cavity formed by metal-doped material
[52].
Fig. 11. Schematic
[53](a) and experimental setup
[53](b) of proposal from Thompson’s group.
Fig. 12. Schematic of proposal from Sankey’s group
[54].
Fig. 13. Schematic of vibrating membrane cavity with two pumps
[55].
Fig. 14. Structure of zipper-like photonic crystal cavity
[57] Fig. 15. Structures of (a) snowflake photonic crystal cavity
[58], (b) diamond NV center photonic crystal cavity
[59], and (c) hexagonal photonic crystal cavity
[61].
Fig. 16. Structures of (a) distributed superconducting microwave cavity
[62] and (b) drum-like superconducting microwave cavity
[63].
Fig. 17. Schematic (a) and structure (b) of Si
3N
4 membrane superconducting microwave cavity
[64].
Fig. 18. (a) Structure of membrane superconducting microwave cavity designed by Li et al.
[65]; (b) experimental setup designed by Bienfait et al.
[66].
Fig. 19. (a) Structure of quadrature hybrid coupler
[73]; (b) structure of 20 dB directional coupler
[73]; (c) schematic of microwave EPR state preparation
[74].
Fig. 20. Schematic of microwave continuous-variable entanglement state preparation proposed by Li et al.
[75].
Fig. 21. Structure of superconducting microwave cavity designed by Palomaki et al.
[76].
Fig. 22. Schematic of microwave squeezed state preparation and microwave-mechanical vibration mode entanglement preparation proposed by Sete et al.
[77].
Fig. 23. Schematic of preparing highly squeezed state in microwave domain
[78].
Fig. 24. Schematic of cavity electro-opto-mechanical system
[79].
Fig. 25. Schematic of cavity electro-opto-mechanical hybrid quantum interface proposed by Tian
[83].
Fig. 26. Schematic and structure of cavity electro-opto-mechanical converter designed by Andrews et al.
[84].
Fig. 27. Schematic of distant microwave fields entanglement preparation proposed by Abdi et al.
[85].
Fig. 28. Schematic of microwave quantum illumination based on double cavity electro-opto-mechanical converters
[79] Fig. 29. Schematic of Gaussian and non-Gaussian microwave quantum states preparation based on cavity electro-opto-mechanical converter
[86].
Fig. 30. Schematic of cavity electro-opto-mechanical converter introducing optical parametric amplifier
[87].
Fig. 31. Schematic of quantum state transferring proposed by Regal’sgroup
[88].
Fig. 32. Schematic of multichannel quantum router based on cavity electro-opto-mechanical
[89].
Fig. 33. Schematic of heraldedmicrowave-optical entanglement preparation based on cavity electro-opto-mechanical system
[90].
类别 | 品质因数水平 | 振子质量水平 | 振子频率水平 | 优势 | 不足 | 法布里-珀罗腔 | 104 | kg—pg | kHz—MHz | 技术成熟, 应用广泛 | 品质因数水平较低, 耗散较大、不易集成 | 回音壁腔 | 109(微球腔)
108(微环腔)
| ng—fg | MHz—GHz | 光力耦合度高, 构造灵活,
腔内光子寿命长
| 工艺要求高、成本高 | 振动薄膜腔 | 105 | pg | MHz | 结构简单、灵活 | 耗散较大、不易集成 | 光子晶体腔 | 106 | fg | GHz | 可利用自由度多, 片上可扩展
性好, 精确的模式控制
| 工艺复杂 | 超导微波腔 | 107 | pg | MHz | 可高度集成, 与超导器件兼容,
腔的稳定性好, 热噪声水平低
| 超低温, 电磁噪声谱较宽 |
|
Table 1. Summary for current research states of 5 main cavity optomechanical systems.
5种主要腔光力系统的研究现状总结
腔光力系统类型 | 作用类型 | 模式数 | 腔类型 | 制备的微波非经典量子态 | 腔电力系统 | 光子-声子 | 2 | 微波腔 | 连续变量微波纠缠态, 微波压缩态, 微波-机械
振子谐振模纠缠态
| 腔电光力系统 | 光子-声子-光子 | 3 | 微波腔, 光腔 | 连续、离散变量微波纠缠态, 微波单光子Fock态,
微波-机械振子谐振模纠缠态, 微波-光纠缠态
|
|
Table 2. Preparations of non-classical quantum statesof microwave based on cavity opto-mechanical system
基于腔光力系统的微波非经典量子态制备