Demonstration of a photonic time-frequency Fourier transform and temporal double slit using atomic quantum memory
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866916995727884288 |
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| author | Papneja, Ankit Everett, Jesse Trainor, Cameron Tranter, Aaron D. Buchler, Ben C. |
| author_facet | Papneja, Ankit Everett, Jesse Trainor, Cameron Tranter, Aaron D. Buchler, Ben C. |
| contents | A quantum memory for light is expected to play a crucial role in quantum communication protocols and distributed quantum computing. In addition to storage and buffering, a quantum memory can be used for manipulations of stored states to allow more complex quantum network operations. In this work, we demonstrate an in-memory Fourier transform using a combination of two well-established quantum memory protocols: Gradient Echo Memory and Electromagnetically Induced Transparency. Our experiment is realised using an ensemble of rubidium atoms that are laser cooled in an elongated magneto-optic trap to maximise optical depth. The results of our time-frequency Fourier transform can be understood as a temporal double slit. We show that the interference between time-separated pulses depends on the relative phase and time between the pulses of light. The use of a quantum memory enables us to illuminate exactly where and how interference occurs between time separated pulses. Time-frequency Fourier manipulation is a well established technique in classical optical systems. Our combination of Fourier manipulation and quantum-compatible memory could be used to bring similar capability to quantum optical systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_09316 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Demonstration of a photonic time-frequency Fourier transform and temporal double slit using atomic quantum memory Papneja, Ankit Everett, Jesse Trainor, Cameron Tranter, Aaron D. Buchler, Ben C. Quantum Physics Atomic Physics A quantum memory for light is expected to play a crucial role in quantum communication protocols and distributed quantum computing. In addition to storage and buffering, a quantum memory can be used for manipulations of stored states to allow more complex quantum network operations. In this work, we demonstrate an in-memory Fourier transform using a combination of two well-established quantum memory protocols: Gradient Echo Memory and Electromagnetically Induced Transparency. Our experiment is realised using an ensemble of rubidium atoms that are laser cooled in an elongated magneto-optic trap to maximise optical depth. The results of our time-frequency Fourier transform can be understood as a temporal double slit. We show that the interference between time-separated pulses depends on the relative phase and time between the pulses of light. The use of a quantum memory enables us to illuminate exactly where and how interference occurs between time separated pulses. Time-frequency Fourier manipulation is a well established technique in classical optical systems. Our combination of Fourier manipulation and quantum-compatible memory could be used to bring similar capability to quantum optical systems. |
| title | Demonstration of a photonic time-frequency Fourier transform and temporal double slit using atomic quantum memory |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2508.09316 |