Free‐Electron Qubits,Annalen Der Physik

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Free‐Electron Qubits
Annalen Der Physik ( IF 2.2 ) Pub Date : 2020-12-08 , DOI: 10.1002/andp.202000254
Ori Reinhardt ₁ , Chen Mechel ₁ , Morgan Lynch ₁ , Ido Kaminer ₁

Affiliation

Free‐electron interactions with laser‐driven nearfields can quantize the electrons’ energy spectrum and provide control over this quantized degree of freedom. The study proposes to use such interactions to promote free electrons as carriers of quantum information and show how to create a qubit on a free electron, which holds promise for applications in electron microscopy and spectroscopy. A method to implement the qubit's noncommutative spin algebra, and to control and measure the qubit state with a universal set of 1‐qubit gates is shown. These gates are within the current capabilities of ultrafast transmission electron microscopes. Laser‐driven free‐electron qubits promise configurability by the laser intensity, frequency, and polarizability, simultaneously with high‐resolution temporal control on femtosecond timescales.

中文翻译：

自由电子量子位

自由电子与激光驱动的近场的相互作用可以量化电子的能谱，并提供对该量化自由度的控制。该研究建议利用这种相互作用来促进自由电子作为量子信息的载体，并展示如何在自由电子上创建量子比特，这为电子显微镜和光谱学的应用提供了希望。展示了一种实现量子位的非交换自旋代数，并使用一组通用的1量子位门控制和测量量子位状态的方法。这些门在超快速透射电子显微镜的当前功能范围内。激光驱动的自由电子量子位通过激光强度，频率和极化率保证可配置性，同时在飞秒时标上进行高分辨率的时间控制。

更新日期：2021-02-10

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