Transparency, nonclassicality, and nonreciprocity in chiral waveguide quantum electrodynamics
We examine quantum statistical properties of transmission and reflection from a chiral waveguide coupled to qubits for arbitrary input powers. We report on several remarkable features of output fields such as transparency, quantum nonreciprocity, and the second-order correlation function g^{(2)}(0)...
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-02-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.013138 |
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| author | Qingtian Miao G. S. Agarwal |
| author_facet | Qingtian Miao G. S. Agarwal |
| author_sort | Qingtian Miao |
| collection | DOAJ |
| description | We examine quantum statistical properties of transmission and reflection from a chiral waveguide coupled to qubits for arbitrary input powers. We report on several remarkable features of output fields such as transparency, quantum nonreciprocity, and the second-order correlation function g^{(2)}(0) values less than unity. In particular, for two qubits detuned antisymmetrically with respect to the central waveguide frequency, we find transparency in forward transmission and in photon numbers for arbitrary values of the input powers provided the phase separation between qubits is an integer multiple of π. Values of g^{(2)}(0) less than unity can be reached even for nonzero value of the intrinsic damping by using phase separation different from integer multiple of π, marking the transition from classical to quantum light. We also uncover a different type of critical coupling regime for qubits that enables complete suppression of forward-propagating amplitude transmission at specific driving powers, giving rise to enhanced nonreciprocal effects in both transmission and quantum fluctuations in amplitudes. Forward propagation amplifies the quantum fluctuations in amplitudes, while backward propagation significantly suppresses them. These findings open pathways for controlling light-matter interactions in chiral quantum electrodynamics, with potential applications in quantum information and nonreciprocal quantum devices. |
| format | Article |
| id | doaj-art-dfbe7d7f4970461bb6c982ceec105ba5 |
| institution | Kabale University |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-dfbe7d7f4970461bb6c982ceec105ba52025-02-06T15:04:55ZengAmerican Physical SocietyPhysical Review Research2643-15642025-02-017101313810.1103/PhysRevResearch.7.013138Transparency, nonclassicality, and nonreciprocity in chiral waveguide quantum electrodynamicsQingtian MiaoG. S. AgarwalWe examine quantum statistical properties of transmission and reflection from a chiral waveguide coupled to qubits for arbitrary input powers. We report on several remarkable features of output fields such as transparency, quantum nonreciprocity, and the second-order correlation function g^{(2)}(0) values less than unity. In particular, for two qubits detuned antisymmetrically with respect to the central waveguide frequency, we find transparency in forward transmission and in photon numbers for arbitrary values of the input powers provided the phase separation between qubits is an integer multiple of π. Values of g^{(2)}(0) less than unity can be reached even for nonzero value of the intrinsic damping by using phase separation different from integer multiple of π, marking the transition from classical to quantum light. We also uncover a different type of critical coupling regime for qubits that enables complete suppression of forward-propagating amplitude transmission at specific driving powers, giving rise to enhanced nonreciprocal effects in both transmission and quantum fluctuations in amplitudes. Forward propagation amplifies the quantum fluctuations in amplitudes, while backward propagation significantly suppresses them. These findings open pathways for controlling light-matter interactions in chiral quantum electrodynamics, with potential applications in quantum information and nonreciprocal quantum devices.http://doi.org/10.1103/PhysRevResearch.7.013138 |
| spellingShingle | Qingtian Miao G. S. Agarwal Transparency, nonclassicality, and nonreciprocity in chiral waveguide quantum electrodynamics Physical Review Research |
| title | Transparency, nonclassicality, and nonreciprocity in chiral waveguide quantum electrodynamics |
| title_full | Transparency, nonclassicality, and nonreciprocity in chiral waveguide quantum electrodynamics |
| title_fullStr | Transparency, nonclassicality, and nonreciprocity in chiral waveguide quantum electrodynamics |
| title_full_unstemmed | Transparency, nonclassicality, and nonreciprocity in chiral waveguide quantum electrodynamics |
| title_short | Transparency, nonclassicality, and nonreciprocity in chiral waveguide quantum electrodynamics |
| title_sort | transparency nonclassicality and nonreciprocity in chiral waveguide quantum electrodynamics |
| url | http://doi.org/10.1103/PhysRevResearch.7.013138 |
| work_keys_str_mv | AT qingtianmiao transparencynonclassicalityandnonreciprocityinchiralwaveguidequantumelectrodynamics AT gsagarwal transparencynonclassicalityandnonreciprocityinchiralwaveguidequantumelectrodynamics |