dorsal/arxiv
View SchemaOptical selection rules and phase-dependent adiabatic state control in a superconducting quantum circuit
| Authors | Yu-xi Liu, J. Q. You, L. F. Wei, C. P. Sun, Franco Nori |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0501047 |
| URL | https://arxiv.org/abs/quant-ph/0501047 |
| DOI | 10.1103/PhysRevLett.95.087001 |
| Journal | Phys. Rev. Lett. 95, 087001 (2005) |
Abstract
We analyze the optical selection rules of the microwave-assisted transitions in a flux qubit superconducting quantum circuit (SQC). We show that the parities of the states relevant to the superconducting phase in the SQC are well-defined when the external magnetic flux $\Phi_{e}=\Phi_{0}/2$, then the selection rules are same as the ones for the electric-dipole transitions in usual atoms. When $\Phi_{e}\neq \Phi_{0}/2$, the symmetry of the potential of the artificial "atom'' is broken, a so-called $\Delta$-type "cyclic" three-level atom is formed, where one- and two-photon processes can coexist. We study how the population of these three states can be selectively transferred by adiabatically controlling the electromagnetic field pulses. Different from $\Lambda$-type atoms, the adiabatic population transfer in our three-level $\Delta$-atom can be controlled not only by the amplitudes but also by the phases of the pulses.
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"abstract": "We analyze the optical selection rules of the microwave-assisted transitions\nin a flux qubit superconducting quantum circuit (SQC). We show that the\nparities of the states relevant to the superconducting phase in the SQC are\nwell-defined when the external magnetic flux $\\Phi_{e}=\\Phi_{0}/2$, then the\nselection rules are same as the ones for the electric-dipole transitions in\nusual atoms. When $\\Phi_{e}\\neq \\Phi_{0}/2$, the symmetry of the potential of\nthe artificial \"atom\u0027\u0027 is broken, a so-called $\\Delta$-type \"cyclic\"\nthree-level atom is formed, where one- and two-photon processes can coexist. We\nstudy how the population of these three states can be selectively transferred\nby adiabatically controlling the electromagnetic field pulses. Different from\n$\\Lambda$-type atoms, the adiabatic population transfer in our three-level\n$\\Delta$-atom can be controlled not only by the amplitudes but also by the\nphases of the pulses.",
"arxiv_id": "quant-ph/0501047",
"authors": [
"Yu-xi Liu",
"J. Q. You",
"L. F. Wei",
"C. P. Sun",
"Franco Nori"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.95.087001",
"journal_ref": "Phys. Rev. Lett. 95, 087001 (2005)",
"title": "Optical selection rules and phase-dependent adiabatic state control in a superconducting quantum circuit",
"url": "https://arxiv.org/abs/quant-ph/0501047"
},
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