Demonstration of Entanglement in Coupled Josephson-Junction Qubits

EIA-0323261F。这个项目是迈向可扩展固态量子计算机的第一步，对密码学、国家安全和科学计算都有影响。在这个项目下，我们从实验和理论两方面考察了由电流偏置约瑟夫森结组成的系统的能级、相干时间、态操纵、门操作和量子行为。在先前对两个电容耦合量子比特的光谱研究的基础上，我们正在研究两个或更多个量子比特的纠缠，这些量子比特不仅是电容耦合的，而且是通过可切换的活性元件耦合的。可切换耦合对于拥有大量量子比特的量子计算机的门操作可能是至关重要的。理论分析有助于设计实验和解释结果。该项目支持研究生和本科生的培训，并为妇女、少数民族和高中生提供参与机会。

EIA-0323261F. C. WellstoodUniversity of Maryland College ParkDemonstration of Entanglement in Coupled Josephson-Junction Qubits This project is a first step toward a scalable solid-state quantum computer with implications for cryptography, national security, and scientific computing. Under this project, the energy levels, coherence times, state manipulation, gate operations, and quantum behavior of systems composed of current-biased Josephson junctions are being examined both examining experimentally and theoretically. Building upon prior spectroscopic studies of two capacitively coupled qubits, the entanglement of two or more qubits, not only coupled capacitively but also coupled by means of switchable active elements are being investigated. Switchable coupling may be crucial for the gate operations of a quantum computer with its large number of qubits. Theoretical analysis is aiding in designing experiments and interpreting results. This project supports training of graduate and undergraduate students and provides opportunities for women, minorities, and high-school students to participate.