Quantum state preparation in circuit QED via Landau-Zener tunneling
Keiji Saito, Martijn Wubs, Sigmund Kohler, Peter Hanggi, and Yosuke, Kayanuma
TL;DR
This paper analyzes how a qubit coupled to a circuit-QED mode undergoes Landau-Zener transitions, providing exact transition probabilities useful for quantum information applications like photon generation and entanglement.
Contribution
It derives an exact nonadiabatic transition probability for a qubit in circuit QED, independent of mode frequency, using an infinite-order perturbation series.
Findings
Exact transition probability derived
Independence from QED mode frequency
Potential applications in photon generation and entanglement
Abstract
We study a qubit undergoing Landau-Zener transitions enabled by the coupling to a circuit-QED mode. Summing an infinite-order perturbation series, we determine the exact nonadiabatic transition probability for the qubit, being independent of the frequency of the QED mode. Possible applications are single-photon generation and the controllable creation of qubit-oscillator entanglement.
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