Probing Quantum Phase Transition in Macroscopic Qubit Array via circuit QED architecture

Abstract

We demonstrate a universal physical mechanism to probe the macroscopic quantum phase transition based on circuit QED architecture. We found that, with certain parameters, the Josephson junction qubit array behaves as an antiferromagnetic Ising model in transverse field and the coupled transmission line resonator serves as a bosonic quantum probe. Our investigation shows that, at the critical point, the drastic broadening of the spectrum of the probe indicates the quantum phase transition.

4 pages, 4 figures

References in corpus (3)

• Ground state overlap and quantum phase transitions
• Probing quantum phases of ultracold atoms in optical lattices by transmission spectra in cavity QED
• Four-qubit device with mixed couplings

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• Bandgap-Assisted Quantum Control of Topological Edge States in a Cavity
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• Topology-dependent quantum dynamics and entanglement-dependent topological pumping in superconducting qubit chains
• Two Mode Photon Bunching Effect as Witness of Quantum Criticality in Circuit QED
• Excitation spectrum for an inhomogeneously dipole-field-coupled superconducting qubit chain
• Efficient generation of NOON states on two microwave-photon resonators
• The quantum transverse-field Ising chain in circuit QED: effects of disorder on the nonequilibrium dynamics
• Cavity-assisted Dynamical Quantum Phase Transition at Bifurcation Points
• Quantum temporal steering in a dephasing channel with quantum criticality
• Noise-Robust Detection of Quantum Phase Transitions
• A superconducting circuit probe for analog quantum simulators