Correlated Decay and Coherent Exchange Interaction between Two Distant Superconducting Qubits

Project: Research

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Cooperative effects between atoms are very important phenomena in nature. Interaction between real atoms has been studied in 3-dimensional free space and inside a cavity. However, the interaction between atoms is very weak due to the spatial mode matching problem in free space between the incident E.M. wave and the emitted E.M. wave by the atom. In addition, it is experimentally challenging to precisely control the distance between atoms. Moreover, the resonant frequencies of the real atom are fixed. With all these difficulties, it is hard to investigate the cooperative effect in a strong coupling regime in free space. We can easily design and engineer tailored quantum systems using superconducting circuits. In particular, the separations between superconducting artificial atoms can be designed longer comparable, or much smaller than the transition wavelength of the atoms in one dimension. We can change the transition frequency of qubit and therefore change the effective distance. Therefore, cooperative effects can be studied clearly with superconducting circuits in one dimensional waveguide. We plan to experimentally reveal the correlated decay and exchange interaction between two qubits in one dimension as well as time dynamics of super and sub-radiance states. To my knowledge, these pieces are missing in the previous studies, Yet, this study will be a very important step on cooperative effect as well as a textbook demonstration of an intriguing phenomenon. 


Project number9043386
Grant typeGRF
StatusNot started
Effective start/end date1/01/23 → …