期刊
PHYSICAL REVIEW A
卷 105, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.105.012824
关键词
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资金
- EPSRC [EP/N031105/1, EP/S000267/1]
- UK National Quantum Technologies Programme through the NQIT Hub (Networked Quantum Information Technologies)
- Quantum Computing and Simulation (QCS) Hub
- Quantum Technology Hub for Sensors and Metrology
- UKRI EPSRC [EP/M013243/1, EP/T001062/1, EP/M013294/1]
- Royal Society
Researchers propose a scheme to place a diamond with negatively charged nitrogen-vacancy centers in a macroscopic spatial superposition with a separation of over 250 nm, while utilizing dynamical decoupling.
Levitated nanodiamonds containing negatively charged nitrogen-vacancy centers (NV-) have been proposed as a platform to generate macroscopic spatial superpositions. Requirements for this include having a long NV- spin coherence time, which necessitates formulating a dynamical decoupling strategy in which the regular spin flips do not cancel the growth of the superposition through the Stern-Gerlach effect in an inhomogeneous magnetic field. Here, we propose a scheme to place a 250-nm-diameter diamond in a superposition with spatial separation of over 250 nm, while incorporating dynamical decoupling. We achieve this by letting a diamond fall for 2.4 m through a magnetic structure, including 1.13 m in an inhomogeneous region generated by magnetic teeth.
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