Improving transmon qudit measurement on IBM Quantum hardware
Tobias Kehrer, Tobias Nadolny, Christoph Bruder
DOI 10.1103/PhysRevResearch.6.013050 · Physical Review Research
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The Hilbert space of a physical qubit typically features more than two energy levels. Using states outside the qubit subspace can provide advantages in quantum computation. To benefit from these advantages, individual states of the d-dimensional qudit Hilbert space have to be discriminated during readout. We propose and analyze two measurement strategies that improve the distinguishability of transmon qudit states. Based on a model describing the readout of a transmon qudit coupled to a resonator, we identify the regime in hardware parameter space where each strategy is optimal. We discuss these strategies in the context of a practical implementation of the default measurement of a ququart on IBM Quantum hardware whose states are prepared by employing higher-order X gates that make use of two-photon transitions.
Similar papers
Implementing generalized measurements with superconducting qubits
similarity 0.89Justin Dressel et al.
Source status unknown — claims are unverified
Model-Based Optimization of Superconducting Qubit Readout
similarity 0.89Andreas Bengtsson et al.
Source status unknown — claims are unverified
Perturbative analysis of quasiperiodic patterning of transmon quantum computers: Enhancement of many-body localization
similarity 0.89Evangelos Varvelis & David P. DiVincenzo
Source status unknown — claims are unverified
Quantum metrology with a transmon qutrit
similarity 0.89A. R. Shlyakhov et al.
Source status unknown — claims are unverified
Spectrum analysis with parametrically modulated transmon qubits
similarity 0.89Nir Gavrielov et al.
Source status unknown — claims are unverified
Robust, fast, and high-fidelity composite single-qubit gates for superconducting transmon qubits
similarity 0.88Hristo G. Tonchev et al.
Source status unknown — claims are unverified