Capacitively-coupled and inductively-coupled excitons in bilayer MoS$_2$

Inductively coupled superconducting half wavelength resonators as persistent current traps for ultracold atoms

A crucial point in the experimental implementation of hybrid quantum systems consisting of superconducting circuits and atomic ensembles is bringing the two partners close enough to each other that a strong quantum coherent coupling can be established. Here, we propose to use the metallization structures of a half wavelength superconducting coplanar waveguide resonator as a persistent current trap for ultracold paramagnetic atoms. Trapping atoms with the resonator structure itself is provided by using short-ended and inductively coupled resonators instead of capacitively coupled ones as custom…

作为远红外光子计数器的电容耦合热电子纳米测辐射计

Capacitively coupled hot-electron nanobolometer as far-infrared photon counter

我们从理论上表明，热电子纳米测辐射计组成的一小块正常的金属，电容耦合到超导天线通过一对正常的金属-绝缘体-超导体（NIS）隧道结可以用作远红外光子计数器。为了使设备在高计数率最有效，我们建议使用的测辐射热计在最简单的配置，当NIS隧道结被用作电子冷却器和温度计。正常金属中光子的吸收会产生电子温度脉冲，该温度通过NIS结测量。该计数器可分辨波长达0.3- 0.4毫米的光子，典型的再平衡时间常数约为20纳秒。

Programmable two-qubit gates in capacitively coupled flopping-mode spin qubits

Recent achievements in the field of gate defined semiconductor quantum dots reinforce the concept of a spin-based quantum computer consisting of nodes of locally connected qubits which communicate with each other via superconducting circuit resonator photons. In this work we theoretically demonstrate a versatile set of quantum gates between adjacent spin qubits defined in semiconductor quantum dots situated within the same node of such a spin-based quantum computer. The electric dipole acquired by the spin of an electron that moves across a double quantum dot potential in a magnetic field grad…

分子自旋超导芯片中极子-极子相干耦合

Polariton-polariton coherent coupling in a molecular spin-superconductor chip

研究通过分子自旋超导芯片实现极子-极子相干耦合，利用磁场所致的频率调制和避免能级交叉验证了电路介导的相干相互作用。

基于超导电流镜的保护量子比特

Protected qubit based on a superconducting current mirror

我们提出了一种基于电容耦合约瑟夫森结链中激子凝聚的量子比特实现方案。量子位是受保护的，因为随着链长的增加，其有效哈密顿量中所有不需要的项都被指数抑制。我们还描述了一套通用的量子门的实现。大多数门还提供指数误差抑制。唯一一个本质上不是容错的门需要以大约50%的精度实现，前提是其他门是精确的。