AI Article Synopsis

  • The researchers create a theoretical framework to manipulate quantum correlations and entanglement using superconducting qubits in a waveguide, considering how the qubit frequencies change over time.
  • They find that by adjusting the frequencies of two qubits with a specific phase shift, they can achieve both bunching and antibunching effects in photon emissions, as well as generate Bell states between photons from different frequencies.
  • This method, which involves transforming quantum excitations based on symmetry properties, can be applied broadly to manage correlations in various quantum systems that are dynamically altered.

Article Abstract

We develop a general theoretical framework to dynamically engineer quantum correlations and entanglement in the frequency-comb emission from an array of superconducting qubits in a waveguide, rigorously accounting for the temporal modulation of the qubit resonance frequencies. We demonstrate that when the resonance frequencies of the two qubits are periodically modulated with a π phase shift, it is possible to realize simultaneous bunching and antibunching in cross-correlations as well as Bell states of the scattered photons from different sidebands. Our approach, based on the dynamical conversion between the quantum excitations with different parity symmetry, is quite universal. It can be used to control multiparticle correlations in generic dynamically modulated dissipative quantum systems.

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Source
http://dx.doi.org/10.1103/PhysRevLett.130.023601DOI Listing

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