Quantum levitation by left-handed metamaterials

巨原子与左手超晶格超材料耦合的电路量子电动力学

Circuit QED with a Giant Atom Coupling to Left-handed Superlattice Metamaterials

本文首次研究巨原子与左手超晶格超材料的电路量子电动力学，揭示非对称带隙下自发辐射、非马尔可夫束缚态及双发射体拉比振荡等干涉动力学特性。

Repulsive and restoring Casimir forces with left-handed materials

We investigate repulsive Casimir force between slabs containing left-handed materials with controllable electromagnetic properties. The sign of Casimir force is determined by the electric and magnetic properties of the materials, and it is shown that the formation of the repulsive force is related to the wave impedances of two slabs. The sign change of the Casimir force as a function of the distance is studied. Special emphasis is put on the restoring Casimir force which may be found to exist between perfectly conducting material and metamaterial slabs. This restoring force is a natural power …

利用左手 Josephson 传输线实现自相位匹配的宽带放大

Self phase-matched broadband amplification with a left-handed Josephson transmission line

针对 J-TWPA 中非线性效应导致的相位匹配难题，提出基于左手负折射率 Josephson 超材料的自相位匹配传输线，无需复杂工程即可在数 GHz 带宽实现超过 20 dB 增益。

由多模左手超导环形谐振器介导的人工原子之间的纠缠相互作用

Entangling interactions between artificial atoms mediated by a multimode left-handed superconducting ring resonator

本文研究多模左手超导环形谐振器介导的双量子比特耦合，通过磁通可调量子比特表征并建模横向交换与高阶 ZZ 相互作用的过零及符号变化，为可调纠缠门提供方案。

Mode Structure in Superconducting Metamaterial Transmission Line Resonators

Superconducting metamaterials are a promising resource for quantum information science. In the context of circuit QED, they provide a means to engineer on-chip, novel dispersion relations and a band structure that could ultimately be utilized for generating complex entangled states of quantum circuitry, for quantum reservoir engineering, and as an element for quantum simulation architectures. Here we report on the development and measurement at millikelvin temperatures of a particular type of circuit metamaterial resonator composed of planar superconducting lumped-element reactances in the for…

The relativistic electron gas: a candidate for nature's left-handed material

The electric permittivities and magnetic permeabilities for a relativistic electron gas are calculated from quantum electrodynamics at finite temperature and density as functions of temperature, chemical potential, frequency, and wavevector. The polarization and the magnetization depend linearly on both electric and magnetic fields, and are the sum of a zero-temperature and zero-density vacuum part with a temperature- and chemical potential-dependent medium part. Analytic calculations lead to generalized expressions that depend on three scalar functions. In the nonrelativistic limit, results r…