REVIEW 5 cited by
Exceeding the Parametric Drive Strength Threshold in Nonlinear Circuits
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Exceeding the Parametric Drive Strength Threshold in Nonlinear Circuits
read the original abstract
Superconducting quantum circuits rely on strong drives to implement fast gates, high-fidelity readout, and state stabilization. However, these drives can induce uncontrolled excitations, so-called "ionization", that compromise the fidelity of these operations. While now well-characterized in the context of qubit readout, it remains unclear how general this limitation is across the more general setting of parametric control. Here, we demonstrate that a nonlinear coupler, exemplified by a transmon, undergoes ionization under strong parametric driving, leading to a breakdown of coherent control and thereby limiting the accessible gate speeds. Through experiments and numerical simulations, we associate this behavior with the emergence of drive-induced chaotic dynamics, which we characterize quantitatively using the instantaneous Floquet spectrum. Our results reveal that the Floquet spectrum provides a unifying framework for understanding strong-drive limitations across a wide range of operations on superconducting quantum circuits. This insight establishes fundamental constraints on parametric control and offers design principles for mitigating drive-induced decoherence in next-generation quantum processors.
Forward citations
Cited by 5 Pith papers
-
Collapse and Inversion of the Josephson Potential in a Strongly Driven Superconducting Circuit
The Josephson potential of a transmon collapses and inverts under a strong fast flux drive, dynamically stabilizing the qubit at φ=π, as shown by spectroscopy and readout.
-
Parametrically induced strong coupling between a superconducting quantum circuit and a solid-state spin ensemble
Parametric pumping realizes on-demand several-MHz coupling between a Josephson circuit and solid-state spin ensemble for potential quantum state transfer.
-
Scalable Single-Step Generation of W States in 2D Superconducting Qubit Lattices
Demonstrates single-step coherent excitation distribution to generate W states in 2D superconducting qubit lattices, achieving 83.9% fidelity for 6 qubits in 99 ns and 79.6% for 7 qubits in 264 ns.
-
Nonperturbative Leakage Elimination Operator-Based Quantum Control Pulse Design Beyond the High Frequency Driving Regime
Recasts LEO quantum control in nonperturbative Floquet-Magnus framework to derive low-frequency pulse conditions, proves equivalence to prior zero-order results, and validates on spin-chain state transfer and two-leve...
-
Probing excited-state dynamics of transmon ionization
Experimental verification that transmon ionization under strong readout drives is a controllable Landau-Zener transition, with quantitative measurements of critical photon numbers and population transfer matching a se...
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.