Minimal excitation states of electrons in one-dimensional wires.
Minimal excitation states of electrons in one-dimensional wires.
复制标题
DOI：
10.1103/physrevlett.97.116403
复制
发表时间：
2006-04
影响因子：
8.6
通讯作者：
Jonathan Keeling;I. Klich;L. Levitov
中科院分区：
文献类型：
--
作者：
Jonathan Keeling;I. Klich;L. Levitov
提出了一种利用具有真实参数的电磁脉冲以无噪声的方式激发来自费米海的粒子的策略。我们证明，通过使用简单形式的量子化脉冲，可以抑制由一般激发产生的粒子-空穴对。由此产生的多体状态的特征是一个或几个粒子在费米面上方被激发，而在费米面下方没有扰动。这些激发带的电荷对于非相互作用电子气是整数，对于Luttinger液体是分数。推导了描述这些激励的算子代数，并提出了一种依赖于噪声测量的激励检测方法。
A strategy is proposed to excite particles from a Fermi sea in a noise-free fashion by electromagnetic pulses with realistic parameters. We show that by using quantized pulses of simple form one can suppress the particle-hole pairs which are created by a generic excitation. The resulting many-body states are characterized by one or several particles excited above the Fermi surface accompanied by no disturbance below it. These excitations carry charge which is integer for noninteracting electron gas and fractional for Luttinger liquid. The operator algebra describing these excitations is derived, and a method of their detection which relies on noise measurement is proposed.