Symmetries of the squeeze-driven Kerr oscillator

Iachello F. Cortinas R.G. Pérez-Bernal F. Santos L.F.
Journal of Physics A: Mathematical and Theoretical
Doi 10.1088/1751-8121/ad09eb
Volumen 49
Citas: 0
© 2023 IOP Publishing Ltd.We study the symmetries of the static effective Hamiltonian of a driven superconducting nonlinear oscillator, the so-called squeeze-driven Kerr Hamiltonian, and discover a remarkable quasi-spin symmetry su(2) at integer values of the ratio ? = ? / K of the detuning parameter ? to the Kerr coefficient K. We investigate the stability of this newly discovered symmetry to high-order perturbations arising from the static effective expansion of the driven Hamiltonian. Our finding may find applications in the generation and stabilization of states useful for quantum computing. Finally, we discuss other Hamiltonians with similar properties and within reach of current technologies.
excited-state quantum phase transition, Kerr parametric oscillator, local symmetry, quasi-spin symmetry, squeeze-driven Kerr oscillator
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