Observing parity-time symmetry breaking in a Josephson parametric amplifier
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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-11-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.L042024 |
| _version_ | 1797210353530044416 |
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| author | Chandrashekhar Gaikwad Daria Kowsari Weijian Chen Kater W. Murch |
| author_facet | Chandrashekhar Gaikwad Daria Kowsari Weijian Chen Kater W. Murch |
| author_sort | Chandrashekhar Gaikwad |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-24T10:09:15Z |
| format | Article |
| id | doaj.art-0d801759cfec446f82d371492baa751b |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:09:15Z |
| publishDate | 2023-11-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-0d801759cfec446f82d371492baa751b2024-04-12T17:36:01ZengAmerican Physical SocietyPhysical Review Research2643-15642023-11-0154L04202410.1103/PhysRevResearch.5.L042024Observing parity-time symmetry breaking in a Josephson parametric amplifierChandrashekhar GaikwadDaria KowsariWeijian ChenKater W. MurchA 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.http://doi.org/10.1103/PhysRevResearch.5.L042024 |
| spellingShingle | Chandrashekhar Gaikwad Daria Kowsari Weijian Chen Kater W. Murch Observing parity-time symmetry breaking in a Josephson parametric amplifier Physical Review Research |
| title | Observing parity-time symmetry breaking in a Josephson parametric amplifier |
| title_full | Observing parity-time symmetry breaking in a Josephson parametric amplifier |
| title_fullStr | Observing parity-time symmetry breaking in a Josephson parametric amplifier |
| title_full_unstemmed | Observing parity-time symmetry breaking in a Josephson parametric amplifier |
| title_short | Observing parity-time symmetry breaking in a Josephson parametric amplifier |
| title_sort | observing parity time symmetry breaking in a josephson parametric amplifier |
| url | http://doi.org/10.1103/PhysRevResearch.5.L042024 |
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