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Quantum Fluctuations and the Single Junction Coulomb Blockade



S Girvin, L Glazman, M Jonson, David R. Penn, Mark D. Stiles


We investigate the effect of quantum flucuations on the Coulomb blockade in a single tunnel junction coupled to its environment by a transmission line of arbitrary impedance Z (ω). The quantized oscillating modes of the transmission line are suddenly displaced when an electron tunnels through the junction. For small Z (relative to the quantum of resistance), a weak power-law sero-bias anomaly occurs associted with the infrared-divergent shakeup of low-frequency transmission-line modes. For large Z, the full blockade is recovered. Comparison with recent experiments is made.
Physical Review Letters


Girvin, S. , Glazman, L. , Jonson, M. , Penn, D. and Stiles, M. (1990), Quantum Fluctuations and the Single Junction Coulomb Blockade, Physical Review Letters (Accessed April 15, 2024)
Created December 31, 1989, Updated October 12, 2021