arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2109.08641quant-ph
收藏

利用相干反馈控制确定性制备光学量子比特

Deterministic preparation of optical qubits with coherent feedback control

Amy Rouillard, Tanita Permaul, Sandeep K. Goyal, Thomas Konrad

摘要:

我们提出了一类基于光的辅助自由度的相干反馈控制的单光子或光的经典态携带的轨道角动量和偏振量子比特的制备方案。制备方法使用线性光学器件,并且包括将任意偏振状态转录到两级OAM系统(交换)上,用于光束内的任意OAM值加/减“1”,即没有空间干涉仪。该制备可以独立于系统的潜在未知初始状态以单位效率进行。此外,我们展示了如何将基于测量的量子比特控制通道转化为用于光学实现的相干反馈方案。

英文摘要:

We propose a class of preparation schemes for orbital angular momentum and polarisation qubits carried by single photons or classical states of light based on coherent feedback control by an ancillary degree of freedom of light. The preparation methods use linear optics and include the transcription of an arbitrary polarisation state onto a two-level OAM system (swap) for arbitrary OAM values plus/minus "l" within a light beam, i.e. without spatial interferometer. The preparations can be carried out with unit efficiency independent from the potentially unknown initial state of the system. Moreover, we show how to translate measurement-based qubit control channels into coherent feedback schemes for optical implementation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑