Deterministic linear-optical computing with symmetry-based qubits
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866917389932691456 |
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| author | Simon, David S. Schwarze, Christopher R. Manni, Anthony D. Ndao, Abdoulaye Sergienko, Alexander V. |
| author_facet | Simon, David S. Schwarze, Christopher R. Manni, Anthony D. Ndao, Abdoulaye Sergienko, Alexander V. |
| contents | A particular type of linear optical multiport, the Grover four-port, has previously been shown to couple the spatial symmetry of a photon to its direction of travel. It is shown here that use of a nonstandard choice of qubit, based on symmetry, allows Grover four ports to act as compact, low-resource deterministic linear optical controlledNOTgates, with no post-selection or ancilla measurements required. This approach allows programmable devices, made from Grover multiports in combination with other standard optical components, that can implement multiple different one-, two-, and three-qubit gates, including the Fredkin and Toffoli gates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_06584 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Deterministic linear-optical computing with symmetry-based qubits Simon, David S. Schwarze, Christopher R. Manni, Anthony D. Ndao, Abdoulaye Sergienko, Alexander V. Quantum Physics A particular type of linear optical multiport, the Grover four-port, has previously been shown to couple the spatial symmetry of a photon to its direction of travel. It is shown here that use of a nonstandard choice of qubit, based on symmetry, allows Grover four ports to act as compact, low-resource deterministic linear optical controlledNOTgates, with no post-selection or ancilla measurements required. This approach allows programmable devices, made from Grover multiports in combination with other standard optical components, that can implement multiple different one-, two-, and three-qubit gates, including the Fredkin and Toffoli gates. |
| title | Deterministic linear-optical computing with symmetry-based qubits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.06584 |