Microwave-induced coupling of superconducting qubits

By G. Paraoanu. 2006

146 citations recorded by the source corpus.

We investigate the quantum dynamics of a system of two coupled superconducting qubits under microwave irradiation. We find that, with the qubits operated at the charge co-degeneracy point, the quantum evolution of the system can be described by a new effective Hamiltonian which has the form of two coupled qubits with tunable coupling between them. This Hamiltonian can be used for experimental tests on macroscopic entanglement and for implementing quantum gates.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/5dad2890323d6e49e8e104ffe60f7a22c8cdf9ed

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Quantum information processing with superconducting circuits: a review (2016, background): “The tunability of the effective coupling strength G results from the evolution of the dressed Q1 eigenstates as the field amplitude F is adjusted [255, 256]:”
Error mitigation extends the computational reach of a noisy quantum processor (2018, methodology): “For our ﬁxed-frequency qubits, we use the all-microwave cross-resonance (CR) gate [19, 20], which is implemented by driving a control qubit Q c with a Gaussian-square-modulated microwave pulse that is resonant with the frequency of the target qubit Q t .”
Hardware-efficient variational quantum eigensolver for small molecules and quantum magnets (2017, methodology): “The SPSA algorithm approximates the gradient using only two energy measurements, regardless of the dimensions of the parameter space p, achieving a level of accuracy comparable to standard gradient descent methods, in the presence of stochastic fluctuations [10].”
Probabilistic error cancellation with sparse Pauli–Lindblad models on noisy quantum processors (2022, methodology): “The two-qubit CX gates were implemented using cross-resonance pulses [46, 47] with gate times optimized to maximize ﬁdelity.”