Free-Electron Qubits

被引：37
作者：
Reinhardt, Ori [1 ,2 ]
Mechel, Chen [1 ,2 ]
Lynch, Morgan [1 ,2 ]
Kaminer, Ido [1 ,2 ]
机构：
[1] Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel
[2] Technion Israel Inst Technol, Solid State Inst, IL-32000 Haifa, Israel
来源：
ANNALEN DER PHYSIK | 2021年 / 533卷 / 02期
基金：
欧洲研究理事会; 以色列科学基金会;
关键词：
electron− light interactions; femtosecond lasers; free‐ electron physics; quantum information; qubits; QUANTUM COMPUTATION; INFORMATION; BEAMS; GENERATION; MICROSCOPY; SCHEME;
D O I：
10.1002/andp.202000254
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：7
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