Parametrically Activated Entangling Gates Using Transmon Qubits
By S. Caldwell, N. Didier, C. Ryan, E. Sete, A. Hudson, Peter J. Karalekas, R. Manenti, M. Reagor, M. Silva, R. Sinclair and 52 more. Physical Review Applied, 2017
166 citations recorded by the source corpus.
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.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/795f84f5de5cd8d20818861f5036f6d4f86f821d
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Perfect quantum state transfer in a superconducting qubit chain with parametrically tunable couplings. (2018, methodology): “The former case of parametric modulation has been used to create entangling gates between two transmon qubits [37, 38, 52].”