Observing Parity Time Symmetry Breaking in a Josephson Parametric Amplifier
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866913347232858112 |
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| author | Gaikwad, Chandrashekhar Kowsari, Daria Chen, Weijian Murch, Kater W. |
| author_facet | Gaikwad, Chandrashekhar Kowsari, Daria Chen, Weijian Murch, Kater W. |
| contents | A coupled two-mode system with balanced gain and loss is a paradigmatic example of an open quantum system that can exhibit real spectra despite being described by a non-Hermitian Hamiltonian. We utilize a degenerate parametric amplifier operating in three-wave mixing mode to realize such a system of balanced gain and loss between the two quadrature modes of the amplifier. By examining the time-domain response of the amplifier, we observe a characteristic transition from real-to-imaginary energy eigenvalues associated with the Parity-Time-symmetry-breaking transition. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_14980 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observing Parity Time Symmetry Breaking in a Josephson Parametric Amplifier Gaikwad, Chandrashekhar Kowsari, Daria Chen, Weijian Murch, Kater W. Quantum Physics Mesoscale and Nanoscale Physics Superconductivity Optics A coupled two-mode system with balanced gain and loss is a paradigmatic example of an open quantum system that can exhibit real spectra despite being described by a non-Hermitian Hamiltonian. We utilize a degenerate parametric amplifier operating in three-wave mixing mode to realize such a system of balanced gain and loss between the two quadrature modes of the amplifier. By examining the time-domain response of the amplifier, we observe a characteristic transition from real-to-imaginary energy eigenvalues associated with the Parity-Time-symmetry-breaking transition. |
| title | Observing Parity Time Symmetry Breaking in a Josephson Parametric Amplifier |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Superconductivity Optics |
| url | https://arxiv.org/abs/2306.14980 |