权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Hybrid Cavity-QED with Rydberg Atoms and Microwave Circuits

具有里德伯原子和微波电路的混合腔 QED

基本信息

批准号：
EP/L019620/1
负责人：
Stephen Hogan
金额：
$ 66.84万
依托单位：
University College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2014
资助国家：
英国
起止时间：
2014 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FL019620%2F1
关键词：
Hybrid Cavity QED Rydberg Atoms

项目摘要

Atoms and molecules in highly-excited Rydberg states can exhibit very large electric dipole moments, on the order of 1000 Debye. These large dipole moments make them very well suited to studies of light-matter interactions at microwave frequencies, and long-range dipolar interactions in free-space and close to surfaces. They also make samples in high Rydberg states states very amenable to manipulation and trapping using inhomogeneous electric fields. The recent development of a new chip-based experimental architecture which exploits these large electric dipole moments to control the translational motion and internal quantum states of Rydberg atoms and molecules close to surfaces has opened up new opportunities in (i) the development of hybrid approaches to quantum information processing in which gas-phase and solid-state systems are combined, (ii) studies of long-range interactions between Rydberg atoms/molecules and surfaces, and (iii) the preparation and study of gas-phase molecular samples at low temperatures. In the work described in this proposal it is planned to exploit, and further develop, this architecture, in a manner which encompasses the first two of these areas, to perform experiments in a setting which can be described as a hybrid between traditional cavity-quantum-electrodynamics (cavity-QED), involving three-dimensional resonators and two-level quantum systems in the gas-phase, and purely solid-state circuit-QED.To achieve this helium atoms will be prepared in long-lived, circular Rydberg states. These states will then be coupled to microwave fields in the vicinity of chip-based co-planar microwave waveguides to study their coherence times and long-range Rydberg-atom--surface interactions. The off-resonant interaction of these atomic samples with chip-based superconducting microwave resonators will then be exploited for the realisation of new chip-based devices for non-destructive detection of the Rydberg samples.In the long term it is foreseen to use the gas-phase Rydberg atoms in this hybrid system as long-coherence-time quantum memories which are coupled via the chip-based microwave resonators to superconducting circuits in which fast operations can be performed. In this way, the challenges associated with exploiting each system individually for applications in quantum information processing will be circumvented.

处于高激发里德堡态的原子和分子可以表现出非常大的电偶极矩，约为1000德拜。这些大的偶极矩使它们非常适合研究微波频率下的光-物质相互作用，以及自由空间和接近表面的长程偶极相互作用。它们还使处于高里德堡态的样品非常易于使用非均匀电场进行操纵和捕获。最近开发了一种新的基于芯片的实验架构，该架构利用这些大的电偶极矩来控制靠近表面的里德伯原子和分子的平移运动和内部量子态，这为以下方面开辟了新的机会：（i）开发混合方法来进行量子信息处理，其中气相和固态系统相结合，（ii）里德伯原子/分子与表面之间长程相互作用的研究;（iii）低温下气相分子样品的制备和研究。在本提案中描述的工作中，计划以涵盖前两个领域的方式利用并进一步开发这种架构，以在可以被描述为传统腔量子电动力学之间的混合体的设置中执行实验（腔QED），涉及三维谐振器和气相中的两能级量子系统，为了实现这一目标，氦原子将处于长寿命的环形里德堡态。然后，这些状态将耦合到基于芯片的共面微波波导附近的微波场，以研究它们的相干时间和长程里德伯原子-表面相互作用。这些原子样品与基于芯片的超导微波谐振器的非共振相互作用将被用于实现新的基于芯片的设备，用于对里德伯样品的无损检测。从长远来看，可以预见的是，在这种混合系统中使用气相里德伯原子作为长相干时间量子存储器，它们通过芯片耦合，基于微波谐振器的超导电路，其中可以执行快速操作。通过这种方式，将规避与单独利用每个系统用于量子信息处理应用相关的挑战。