Spin-photon entanglement with direct photon emission in the telecom C-band
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866916821681045504 |
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| author | Laccotripes, P. Müller, T. Stevenson, R. M. Skiba-Szymanska, J. Ritchie, D. A. Shields, A. J. |
| author_facet | Laccotripes, P. Müller, T. Stevenson, R. M. Skiba-Szymanska, J. Ritchie, D. A. Shields, A. J. |
| contents | The ever-evolving demands for computational power and for a securely connected world dictate the development of quantum networks where entanglement is distributed between connected parties. Solid-state quantum emitters in the telecom C-band are a promising platform for quantum communication applications due to the minimal absorption of photons at these wavelengths, "on-demand" generation of single photon flying qubits, and ease of integration with existing network infrastructure. Here, we use an InAs/InP quantum dot to implement an optically active spin-qubit, based on a negatively charged exciton where the electron spin degeneracy is lifted using a Voigt magnetic field. We investigate the coherent interactions of the spin-qubit system under resonant excitation, demonstrating high fidelity spin initialisation and coherent control using picosecond pulses. We further use these tools to measure the coherence of a single, undisturbed electron spin in our system. Finally, we report the first demonstration of spin-photon entanglement in a solid-state system capable of direct emission into the telecom C-band. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_16930 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Spin-photon entanglement with direct photon emission in the telecom C-band Laccotripes, P. Müller, T. Stevenson, R. M. Skiba-Szymanska, J. Ritchie, D. A. Shields, A. J. Quantum Physics The ever-evolving demands for computational power and for a securely connected world dictate the development of quantum networks where entanglement is distributed between connected parties. Solid-state quantum emitters in the telecom C-band are a promising platform for quantum communication applications due to the minimal absorption of photons at these wavelengths, "on-demand" generation of single photon flying qubits, and ease of integration with existing network infrastructure. Here, we use an InAs/InP quantum dot to implement an optically active spin-qubit, based on a negatively charged exciton where the electron spin degeneracy is lifted using a Voigt magnetic field. We investigate the coherent interactions of the spin-qubit system under resonant excitation, demonstrating high fidelity spin initialisation and coherent control using picosecond pulses. We further use these tools to measure the coherence of a single, undisturbed electron spin in our system. Finally, we report the first demonstration of spin-photon entanglement in a solid-state system capable of direct emission into the telecom C-band. |
| title | Spin-photon entanglement with direct photon emission in the telecom C-band |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2310.16930 |