Improved coherence time of a non-Hermitian qubit in a $\mathcal{PT}$-symmetric Environment
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914169170690048 |
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| author | Duttatreya Mohanty, Ipsika Dey, Sanjib |
| author_facet | Duttatreya Mohanty, Ipsika Dey, Sanjib |
| contents | Quantum computing's potential for exponential speedup is fundamentally limited by decoherence, a phenomenon arising from environmental interactions. Non-Hermitian quantum mechanics, particularly $PT$-symmetric systems, offers a novel framework for extending coherence times. This study examines a qubit's coherence under non-Hermitian $PT$-symmetric dynamics, highlighting significantly enhanced coherence times compared to Hermitian setups. The effect is especially pronounced when both the system and environment exhibit $PT$-symmetry. Interestingly, greater environmental non-Hermiticity correlates with extended coherence, contrary to traditional expectations. These findings point to promising strategies for managing decoherence, which could significantly advance approaches to quantum information processing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_09990 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Improved coherence time of a non-Hermitian qubit in a $\mathcal{PT}$-symmetric Environment Duttatreya Mohanty, Ipsika Dey, Sanjib Quantum Physics Mathematical Physics Quantum computing's potential for exponential speedup is fundamentally limited by decoherence, a phenomenon arising from environmental interactions. Non-Hermitian quantum mechanics, particularly $PT$-symmetric systems, offers a novel framework for extending coherence times. This study examines a qubit's coherence under non-Hermitian $PT$-symmetric dynamics, highlighting significantly enhanced coherence times compared to Hermitian setups. The effect is especially pronounced when both the system and environment exhibit $PT$-symmetry. Interestingly, greater environmental non-Hermiticity correlates with extended coherence, contrary to traditional expectations. These findings point to promising strategies for managing decoherence, which could significantly advance approaches to quantum information processing. |
| title | Improved coherence time of a non-Hermitian qubit in a $\mathcal{PT}$-symmetric Environment |
| topic | Quantum Physics Mathematical Physics |
| url | https://arxiv.org/abs/2511.09990 |