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Limitation of entanglement due to spatial qubit separation
Roland Doll, Martijn Wubs, Peter Hanggi +1
We consider spatially separated qubits coupled to a thermal bosonic field that causes pure dephasing. Our focus is on the entanglement of two Bell states which for vanishing separa…
Gauging a quantum heat bath with dissipative Landau-Zener transitions
Martijn Wubs, Keiji Saito, Sigmund Kohler +2
We calculate the exact Landau-Zener transitions probabilities for a qubit with arbitrary linear coupling to a bath at zero temperature. The final quantum state exhibits a peculiar…
Quantum state preparation in circuit QED via Landau-Zener tunneling
Keiji Saito, Martijn Wubs, Sigmund Kohler +2
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 nonadiabat…