Photon-assisted tunneling with non-classical light
| Autor: | Julien Gabelli, J. R. Souquet, Pascal Simon, Matthew J. Woolley, Aashish A. Clerk |
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| Rok vydání: | 2014 |
| Předmět: |
Physics
Quantum optics Quantum Physics Multidisciplinary Photon Condensed matter physics Field (physics) Condensed Matter - Mesoscale and Nanoscale Physics General Physics and Astronomy FOS: Physical sciences Nanotechnology General Chemistry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Article General Biochemistry Genetics and Molecular Biology Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Nonclassical light Quantum Physics (quant-ph) Electrical conductor Quantum Quantum tunnelling Microwave cavity |
| Zdroj: | Nature Communications |
| DOI: | 10.48550/arxiv.1408.1128 |
| 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. These hybrid quantum systems hold great promise for quantum information-processing applications; even more strikingly, they enable exploration of new physical regimes. Here we study theoretically the new physics emerging when a quantum electronic conductor is exposed to nonclassical microwaves (for example, 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 tunnelling regime. We find that the conductor acts as a nontrivial probe of the microwave state: the emission and absorption of photons by the conductor is characterized by a nonpositive definite quasi-probability distribution, which is related to the Glauber–Sudarshan P-function of quantum optics. These negative quasi-probabilities have a direct influence on the conductance of the conductor. Coherently coupling microwave photons to quantum electronic conductors could provide a useful platform for quantum information processing. Souquet et al. now theoretically demonstrate that such systems can also act as sensitive probes of the quantum properties of non-classical microwave radiation. |
| Databáze: | OpenAIRE |
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