标题： 电路量子电动力学中具有超导V系统的一可调耦合 显示英文标题

标题： Tunable coupling in circuit quantum electrodynamics with a superconducting V-system

摘要： 最近在超导量子比特方面的进展展示了这些器件在未来量子信息处理中的潜力。 量子计算的一个理想特性是能够独立控制量子比特之间的相互作用以及量子比特的能量。 我们展示了一种新型的超导电荷量子比特，其能量谱呈V形，并利用量子干涉来实现对量子比特能量和与超导腔的偶极耦合的独立控制。 我们通过将耦合强度从小于200 kHz调节到大于40 MHz，实现了对强耦合 regime 的动态访问。 这种可调耦合可用于保护量子比特免受腔诱导的退相干，并在多量子比特系统中避免不必要的量子比特-量子比特相互作用。 显示英文摘要

摘要： Recent progress in superconducting qubits has demonstrated the potential of these devices for the future of quantum information processing. One desirable feature for quantum computing is independent control of qubit interactions as well as qubit energies. We demonstrate a new type of superconducting charge qubit that has a V-shaped energy spectrum and uses quantum interference to provide independent control over the qubit energy and dipole coupling to a superconducting cavity. We demonstrate dynamic access to the strong coupling regime by tuning the coupling strength from less than 200 kHz to more than 40 MHz. This tunable coupling can be used to protect the qubit from cavity-induced relaxation and avoid unwanted qubit-qubit interactions in a multi-qubit system.