Quantum interface between a transmon qubit and spins of nitrogen-vacancy centers
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2017-12-01 |
| Journal | Physical review. A/Physical review, A |
| Authors | Yaowen Hu, Yipu Song, Luming Duan |
| Institutions | Tsinghua University, University of Michigan |
| Citations | 12 |
Abstract
Section titled āAbstractāHybrid quantum circuits combining advantages of each individual system have\nprovided a promising platform for quantum information processing. Here we\npropose an experimental scheme to directly couple a transmon qubit to an\nindividual spin in the nitrogen-vacancy (NV) center, with a coupling strength\nthree orders of magnitude larger than that for a single spin coupled to a\nmicrowave cavity. This direct coupling between the transmon and the NV center\ncould be utilized to make a transmon bus, leading to a coherently virtual\nexchange among different single spins. Furthermore, we demonstrate that, by\ncoupling a transmon to a low-density NV ensemble, a SWAP operation between the\ntransmon and NV ensemble is feasible and a quantum non-demolition measurement\non the state of NV ensemble can be realized on the cavity-transmon-NV-ensemble\nhybrid system. Moreover, on this system, a virtual coupling can be achieved\nbetween the cavity and NV ensemble, which is much larger in magnitude than the\ndirect coupling between the cavity and the NV ensemble. The photon state in\ncavity can be thus stored into NV spins more efficiently through this virtual\ncoupling.\n