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https://doi.org/10.1088/0031-8949/2012/T147/014031
Title: | Validity of resonant two-qubit gates in the ultrastrong coupling regime of circuit quantum electrodynamics | Authors: | Wang, Y.M. Ballester, D. Romero, G. Scarani, V. Solano, E. |
Issue Date: | Feb-2012 | Citation: | Wang, Y.M., Ballester, D., Romero, G., Scarani, V., Solano, E. (2012-02). Validity of resonant two-qubit gates in the ultrastrong coupling regime of circuit quantum electrodynamics. Physica Scripta (T147) : -. ScholarBank@NUS Repository. https://doi.org/10.1088/0031-8949/2012/T147/014031 | Abstract: | We investigate theoretically the performance of resonant two-qubit gates in the crossover from the strong to the ultrastrong coupling regime of lightmatter interaction in circuit quantum electrodynamics. Two controlled-phase (CPHASE) gate schemeswhich work well within the rotating wave-approximationare analysed while taking into account the effects of counter-rotating terms appearing in the Hamiltonian. Our numerical results show that the fidelity of the gate operation is above 96% when the ratio between the coupling strength and the resonator frequency, g/ r, is about 10%. Novel schemes are required in order to implement ultrafast quantum gates when increasing the ratio g/ r. © 2012 The Royal Swedish Academy of Sciences. | Source Title: | Physica Scripta | URI: | http://scholarbank.nus.edu.sg/handle/10635/98546 | ISSN: | 00318949 | DOI: | 10.1088/0031-8949/2012/T147/014031 |
Appears in Collections: | Staff Publications |
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