Parametrically Activated Entangling Gates Using Transmon Qubits
Abstract
We describe and implement a family of entangling gates activated by radio-frequency flux modulation applied to a tunable transmon that is statically coupled to a neighboring transmon. The effect of this modulation is the resonant exchange of photons directly between levels of the two-transmon system, obviating the need for mediating qubits or resonator modes and allowing for the full utilization of all qubits in a scalable architecture. The resonance condition is selective in both the frequency and amplitude of modulation and thus alleviates frequency crowding. We demonstrate the use of three such resonances to produce entangling gates that enable universal quantum computation: one iSWAP gate and two distinct controlled Z gates. We report interleaved randomized benchmarking results indicating gate error rates of 6% for the iSWAP (duration 135ns) and 9% for the controlled Z gates (durations 175 ns and 270 ns), limited largely by qubit coherence.
Cite
@article{arxiv.1706.06562,
title = {Parametrically Activated Entangling Gates Using Transmon Qubits},
author = {S. Caldwell and N. Didier and C. A. Ryan and E. A. Sete and A. Hudson and P. Karalekas and R. Manenti and M. Reagor and M. P. da Silva and R. Sinclair and E. Acala and N. Alidoust and J. Angeles and A. Bestwick and M. Block and B. Bloom and A. Bradley and C. Bui and L. Capelluto and R. Chilcott and J. Cordova and G. Crossman and M. Curtis and S. Deshpande and T. El Bouayadi and D. Girshovich and S. Hong and K. Kuang and M. Lenihan and T. Manning and A. Marchenkov and J. Marshall and R. Maydra and Y. Mohan and W. O'Brien and C. Osborn and J. Otterbach and A. Papageorge and J. -P. Paquette and M. Pelstring and A. Polloreno and G. Prawiroatmodjo and V. Rawat and R. Renzas and N. Rubin and D. Russell and M. Rust and D. Scarabelli and M. Scheer and M. Selvanayagam and R. Smith and A. Staley and M. Suska and N. Tezak and D. C. Thompson and T. -W. To and M. Vahidpour and N. Vodrahalli and T. Whyland and K. Yadav and W. Zeng and C. Rigetti},
journal= {arXiv preprint arXiv:1706.06562},
year = {2018}
}
Comments
As submitted. 7 pages, 6 figures