Electrically tunable macroscopic quantum tunneling in a graphene-based Josephson junction.

@article{Lee2011ElectricallyTM,
  title={Electrically tunable macroscopic quantum tunneling in a graphene-based Josephson junction.},
  author={Gil-Ho Lee and Dongchan Jeong and Jae-Hyun Choi and Yong-Joo Doh and Hu-Jong Lee},
  journal={Physical review letters},
  year={2011},
  volume={107 14},
  pages={
          146605
        }
}
Stochastic switching-current distribution in a graphene-based Josephson junction exhibits a crossover from the classical to quantum regime, revealing the macroscopic quantum tunneling of a Josephson phase particle at low temperatures. Microwave spectroscopy measurements indicate a multiphoton absorption process occurring via discrete energy levels in washboard potential well. The crossover temperature for macroscopic quantum tunneling and the quantized level spacing are controlled with the gate… 
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