Boson sampling with ultracold atoms in a programmable optical lattice
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2022
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| _version_ | 1866909280054018048 |
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| author | Robens, Carsten Arrazola, Iñigo Alt, Wolfgang Meschede, Dieter Lamata, Lucas Solano, Enrique Alberti, Andrea |
| author_facet | Robens, Carsten Arrazola, Iñigo Alt, Wolfgang Meschede, Dieter Lamata, Lucas Solano, Enrique Alberti, Andrea |
| contents | Sampling from a quantum distribution can be exponentially hard for classical computers and yet could be performed efficiently by a noisy intermediate-scale quantum device. A prime example of a distribution that is hard to sample is given by the output states of a linear interferometer traversed by $N$ identical boson particles. Here, we propose a scheme to implement such a boson sampling machine with ultracold atoms in a polarization-synthesized optical lattice. We experimentally demonstrate the basic building block of such a machine by revealing the Hong-Ou-Mandel interference of two bosonic atoms in a four-mode interferometer. To estimate the sampling rate for large $N$, we develop a theoretical model based on a master equation that accounts for particle losses, but not include technical errors. Our results show that atomic samplers have the potential to achieve quantum advantage over today's best supercomputers with $N \gtrsim 40$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2208_12253 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Boson sampling with ultracold atoms in a programmable optical lattice Robens, Carsten Arrazola, Iñigo Alt, Wolfgang Meschede, Dieter Lamata, Lucas Solano, Enrique Alberti, Andrea Quantum Physics Atomic Physics Sampling from a quantum distribution can be exponentially hard for classical computers and yet could be performed efficiently by a noisy intermediate-scale quantum device. A prime example of a distribution that is hard to sample is given by the output states of a linear interferometer traversed by $N$ identical boson particles. Here, we propose a scheme to implement such a boson sampling machine with ultracold atoms in a polarization-synthesized optical lattice. We experimentally demonstrate the basic building block of such a machine by revealing the Hong-Ou-Mandel interference of two bosonic atoms in a four-mode interferometer. To estimate the sampling rate for large $N$, we develop a theoretical model based on a master equation that accounts for particle losses, but not include technical errors. Our results show that atomic samplers have the potential to achieve quantum advantage over today's best supercomputers with $N \gtrsim 40$. |
| title | Boson sampling with ultracold atoms in a programmable optical lattice |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2208.12253 |