Full Bell-basis measurement of an atom-photon 2-qubit state and its application for quantum networks
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866911855473065984 |
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| author | Arenskötter, Elena Kucera, Stephan Elshehy, Omar Bergerhoff, Max Kreis, Matthias Brunel, Léandre Eschner, Jürgen |
| author_facet | Arenskötter, Elena Kucera, Stephan Elshehy, Omar Bergerhoff, Max Kreis, Matthias Brunel, Léandre Eschner, Jürgen |
| contents | The efficiency of a Bell-state measurement on photon pairs is bound to 50\,\% due to the number of Bell states that can be distinguished using linear optics. Here we present the implementation of a protocol that allows us to distinguish all four Bell states by the use of a single-ion quantum memory and heralded absorption as state-selective measurement. The protocol is implemented in two steps. First we demonstrate the state-preserving mapping of a photonic qubit onto the quantum memory, verified by the preservation of entanglement in the process. Then we demonstrate the full Bell state projection between a memory qubit and an incoming photonic qubit, by applying it for atom-to-photon quantum state teleportation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2301_06091 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Full Bell-basis measurement of an atom-photon 2-qubit state and its application for quantum networks Arenskötter, Elena Kucera, Stephan Elshehy, Omar Bergerhoff, Max Kreis, Matthias Brunel, Léandre Eschner, Jürgen Quantum Physics The efficiency of a Bell-state measurement on photon pairs is bound to 50\,\% due to the number of Bell states that can be distinguished using linear optics. Here we present the implementation of a protocol that allows us to distinguish all four Bell states by the use of a single-ion quantum memory and heralded absorption as state-selective measurement. The protocol is implemented in two steps. First we demonstrate the state-preserving mapping of a photonic qubit onto the quantum memory, verified by the preservation of entanglement in the process. Then we demonstrate the full Bell state projection between a memory qubit and an incoming photonic qubit, by applying it for atom-to-photon quantum state teleportation. |
| title | Full Bell-basis measurement of an atom-photon 2-qubit state and its application for quantum networks |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2301.06091 |