Frequency Up-Conversion Schemes for Controlling Superconducting Qubits
- URL: http://arxiv.org/abs/2210.02513v1
- Date: Wed, 5 Oct 2022 19:09:22 GMT
- Title: Frequency Up-Conversion Schemes for Controlling Superconducting Qubits
- Authors: Johannes Herrmann, Christoph Hellings, Stefania Lazar, Fabian
Pf\"affli, Florian Haupt, Tobias Thiele, Dante Colao Zanuz, Graham J. Norris,
Flavio Heer, Christopher Eichler, Andreas Wallraff
- Abstract summary: High-fidelity control of superconducting qubits requires the generation of microwave-frequency pulses precisely tailored on nanosecond timescales.
These pulses are most commonly synthesized by up-converting and superimposing two narrow-band intermediate-frequency signals referred to as the in-phase (I) and quadrature (Q) components.
We experimentally study an alternative approach based on double frequency conversion, which overcomes this challenge and circumvents the need for IQ-calibration.
- Score: 2.5166724908379043
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: High-fidelity control of superconducting qubits requires the generation of
microwave-frequency pulses precisely tailored on nanosecond timescales. These
pulses are most commonly synthesized by up-converting and superimposing two
narrow-band intermediate-frequency signals referred to as the in-phase (I) and
quadrature (Q) components. While the calibration of their DC-offsets, relative
amplitude and phase allows one to cancel unwanted sideband and carrier leakage,
this IQ mixing approach suffers from the presence of additional spurious
frequency components. Here, we experimentally study an alternative approach
based on double frequency conversion, which overcomes this challenge and
circumvents the need for IQ-calibration. We find a spurious-free dynamic range
of more than 70$\,$dB and compare the quality of pulse generation against a
state-of-the-art IQ mixing scheme by performing repeated single-qubit
randomized benchmarking on a superconducting qubit.
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