Photon-assisted tunneling with non-classical light
| Autor: | Souquet, J. -R., Woolley, M. J., Gabelli, Julien, Simon, Pascal, Clerk, Aashish A. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Nature Communications 5, 5562 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/ncomms6562 |
| Popis: | Among the most exciting recent advances in the field of superconducting quantum circuits is the ability to coherently couple microwave photons in low-loss cavities to quantum electronic conductors (e.g.~semiconductor quantum dots or carbon nanotubes). These hybrid quantum systems hold great promise for quantum information processing applications; even more strikingly, they enable exploration of completely new physical regimes. Here we study theoretically the new physics emerging when a quantum electronic conductor is exposed to non-classical microwaves (e.g.~squeezed states, Fock states). We study this interplay in the experimentally-relevant situation where a superconducting microwave cavity is coupled to a conductor in the tunneling regime. We find the quantum conductor acts as a non-trivial probe of the microwave state; in particular, the emission and absorption of photons by the conductor is characterized by a non-positive definite quasi-probability distribution. This negativity has a direct influence on the conductance of the conductor. Comment: 8 pages, 5 figures; Supplementary Information: 12 pages 8 figures |
| Databáze: | arXiv |
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