使用铌酸锂及其掺杂变体在电信波长下对多模量子场进行单光子加法
Single-photon addition to multimode quantum fields at telecom wavelengths using lithium niobate and its doped variants
- School of Quantum Technology, Defence Institute of Advanced Technology（国防先进技术研究院量子技术学院）
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France（卡斯勒·布罗塞尔实验室，索邦大学，法国国家科学研究中心，巴黎文理研究大学，法兰西学院）
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中文总结 AI 辅助
本研究通过理论分析和数值模拟，探讨了在电信波长下使用铌酸锂及其掺杂晶体对多模量子场进行单光子加法，确定了最佳实验条件和相位匹配参数，为非高斯量子态工程提供了平台。
中文摘要 AI 辅助
多模光谱-时间非高斯量子光态在连续变量量子信息处理中扮演着关键角色。特别是，通过在电信波长下对多模量子场进行单光子加法（SPA）产生的非高斯量子态，构成了量子技术的有用资源。我们提出了在电信波长下对多模量子场进行单光子加法（SPA）和模式选择性单光子加法（MSSPA）的详细理论分析和数值模拟。该分析针对同成分生长的铌酸锂（LN）、$5\\%$ MgO掺杂铌酸锂（MgO:LN）以及不同浓度的ZnO掺杂铌酸锂（ZnO:LN）块状晶体进行。我们研究了使用II型参量下转换（PDC）的MSSPA和使用I型PDC过程的SPA。我们进一步展示了在$0^\circ C$至$15^\circ C$温度范围内，使用$5\\%$ MgO:LN在电信波长下的光谱-时间模式选择性SPA。此外，我们进行了基于非共线I型PDC配置的SPA模拟。这些理论结果确定了基于LN的晶体实现SPA和模式选择性SPA的最佳实验条件和相位匹配参数，为电信波长（主要在$1550$ nm）下的非高斯量子态工程提供了潜在平台。
英文摘要
Multimode spectro-temporal non-Gaussian quantum states of light play a crucial role in continuous-variable quantum information processing. In particular, the non-Gaussian quantum states generated through a single-photon addition (SPA) to multimode quantum fields at telecommunication wavelengths constitute a useful resource for quantum technologies. We present a detailed theoretical analysis and numerical simulations of single-photon addition (SPA) and mode-selective single-photon addition (MSSPA) to a multimode quantum field at telecommunication wavelengths. The analysis is performed for congruently grown lithium niobate (LN), $5\%$ MgO-doped lithium niobate (MgO:LN) and various concentrations of ZnO-doped lithium niobate (ZnO:LN) bulk crystals. We investigate MSSPA using type-II parametric down-conversion (PDC) and SPA using the type-I PDC processes. We further present spectro-temporal mode-selective SPA at the telecom wavelength using $5\%$ MgO:LN for temperatures ranging from $0^\circ C$ to $15^\circ C$. In addition, we perform simulations to investigate SPA based on the noncollinear type-I PDC configuration. These theoretical results identify optimal experimental conditions and phase-matching parameters to achieve SPA and mode-selective SPA for LN-based crystals, providing a potential platform for non-Gaussian quantum state engineering at telecommunication wavelengths, mainly at $1550$ nm.
