论文标题
观察限制在4- $μ$ m深的通道的超氟氦中的rydberg共振
Observation of the Rydberg resonance in surface electrons on superfluid helium confined in a 4-$μ$m deep channel
论文作者
论文摘要
我们报告了微波诱导的间隔（Rydberg）共振的第一个观察到限制在单个4- $ $ m $ m深通道中的超流体氦气上。通过观察微波吸收引起的WS熔点，检测到包括Wigner固体（WS）的数千个表面电子的共振信号。在0.4-0.5 THz范围内，观察到的两个最低rydberg状态的过渡频率取决于表面电子在传导微通道电极中引起的图像电荷和由于施加的电压而引起的电势，并且与我们的计算相一致。观察到的在10 GHz阶的谐振大大扩展，这是由于微通道中压接电场的不合同分布所致，这与我们的有限元建模计算也是合理的一致性。这项对限制电子的研究是由于它们在电荷和自旋Qubt的潜在用途而动机。
We report the first observation of the microwave-induced intersubband (Rydberg) resonance in the surface-bound electrons on superfluid helium confined in a single 4-$μ$m deep channel. The resonance signal from a few thousand of surface electrons comprising the Wigner Solid (WS) is detected by observing WS melting due to the microwave absorption. The observed transition frequency for the two lowest Rydberg states, in the range of 0.4-0.5 THz, is determined by the image charges induced by the surface electrons in conducting electrodes of the microchannel and the potentials due to applied voltages, and is in a good agreement with our calculations. The observed large broadening of the resonance on the order of 10 GHz, which is due to inhomegeneous distribution of the pressing electric field in the microchannel, is also in a reasonable agreement with our finite-element modeling calculations. This study of the confined electrons is motivated by their potential use for charge and spin qubits.
