论文标题
通过超导电路实现的光子互联对撞机
Photon-instanton collider implemented by a superconducting circuit
论文作者
论文摘要
时空定位的量子场隧道事件，偶口液体无处不在，在相关的冷凝物和高能系统中无处不在。但是，它们通过与常规颗粒发生碰撞的直接观察尚未被认为是可能的。我们展示了电路量子电动力学的最新进展，特别是将transmon量子置换量与高阻力传输线的电耦合实现，可以观察到与instantons（相滑）的单微波光子的无弹性碰撞。我们开发一种形式主义来计算光子 - instanton横截面，该截面应在其他量子场理论环境中有用。特别是，我们表明，非弹性散射概率可以显着超过常规约瑟夫森四分之一的非谐度的效果，并达到订单 - 非数值。
Instantons, spacetime-localized quantum field tunneling events, are ubiquitous in correlated condensed matter and high energy systems. However, their direct observation through collisions with conventional particles has not been considered possible. We show how recent advances in circuit quantum electrodynamics, specifically, the realization of galvanic coupling of a transmon qubit to a high-impedance transmission line, allows the observation of inelastic collisions of single microwave photons with instantons (phase slips). We develop a formalism for calculating the photon-instanton cross section, which should be useful in other quantum field theoretical contexts. In particular, we show that the inelastic scattering probability can significantly exceed the effect of conventional Josephson quartic anharmonicity, and reach order-unity values.
