Distillation of supersinglet states
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912604618752000 |
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| author | Ahmad, Saeed Li, Shuang Raghoonanan, Jonathan Zhou, Kaixuan Ivannikov, Valentin Byrnes, Tim |
| author_facet | Ahmad, Saeed Li, Shuang Raghoonanan, Jonathan Zhou, Kaixuan Ivannikov, Valentin Byrnes, Tim |
| contents | We introduce an entanglement distillation (purification) protocol for supersinglet states composed of N qubits. The supersinglet state we target is a total spin zero state with zero spin variance, and has a fully entangled structure involving all qubits. In our distillation protocol, three copies of an initial spin zero state are measured in the local total spin basis such that a higher fidelity supersinglet state is generated upon postselection. The initial state can be prepared using conventional Bell state distillation methods distributed in a way to target the supersinglet symmetries. The protocol uses only local operations and classical communications, and is suitable for long-distance applications such as quantum clock synchronization and cryptography, and avoids a high dimensional Schur transform such that it can be used for tasks such as quantum metrology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_20962 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Distillation of supersinglet states Ahmad, Saeed Li, Shuang Raghoonanan, Jonathan Zhou, Kaixuan Ivannikov, Valentin Byrnes, Tim Quantum Physics Applied Physics We introduce an entanglement distillation (purification) protocol for supersinglet states composed of N qubits. The supersinglet state we target is a total spin zero state with zero spin variance, and has a fully entangled structure involving all qubits. In our distillation protocol, three copies of an initial spin zero state are measured in the local total spin basis such that a higher fidelity supersinglet state is generated upon postselection. The initial state can be prepared using conventional Bell state distillation methods distributed in a way to target the supersinglet symmetries. The protocol uses only local operations and classical communications, and is suitable for long-distance applications such as quantum clock synchronization and cryptography, and avoids a high dimensional Schur transform such that it can be used for tasks such as quantum metrology. |
| title | Distillation of supersinglet states |
| topic | Quantum Physics Applied Physics |
| url | https://arxiv.org/abs/2509.20962 |