A Raman heterodyne study of the hyperfine interaction of the optically-excited state 5D0 of Eu3+:Y2SiO5

Ma, Yu; Zhou, Zong‐Quan; Liu, Chao; Han, Yong‐Jian; Yang, Taotao; Tu, Tao; Xiao, Yixin; Liang, Peng-Jun; Li, Pei-Yun; Hua, Yi-Lin; Liu, Xiao; Li, Zongfeng; Hu, J.; Li, Xue; Li, Chuan‐Feng; Guo, Guang‐Can

doi:10.1016/j.jlumin.2018.05.041

Cited by 13 publications

(15 citation statements)

References 36 publications

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“…In order to implement optical storage in a ZEFOZ field, the knowledge of the energy level structures in both the ground and excited state is a prerequisite. Previous works 11,23,24 have determined the spin Hamiltonians for the ground-state 7 F 0 and excited-state 5 D 0 , which can be used to predict the level structures in any given magnetic field. However, the theoretical predictions may have an error comparable to the storage bandwidth and lead to a wrong choice of pumping strategies.…”

Section: Resultsmentioning

confidence: 99%

“…2b). The field is 1.280 T in the direction of [−0.535, −0.634, 0.558] in the [D 1 , D 2 , b] frame of the crystal as indicated in previous works 9,11 ). The sample has a diameter of 4.5 mm and a thickness of 6 mm, and is mounted on two goniometers.…”

Section: Resultsmentioning

confidence: 99%

“…This long-lived spin coherence is a key resource for constructing quantum memories for global quantum communication. Although hours of spin coherence time have been demonstrated, long-lived optical storage remains a challenge because of the complicated and unknown energy structures in ZEFOZ fields [9][10][11] and a reduced effective absorption in magnetic fields 12 because only one subsite can be used for the long-term storage 11 . To date, the longest optical storage time is 1 min realized in 87 Rb atoms 13 and a Pr 3+ :Y 2 SiO 5 crystal using the electromagnetically induced transparency protocol 10 .…”

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confidence: 99%

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One-hour coherent optical storage in an atomic frequency comb memory

Zhou

et al. 2021

Nat Commun

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146

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Photon loss in optical fibers prevents long-distance distribution of quantum information on the ground. Quantum repeater is proposed to overcome this problem, but the communication distance is still limited so far because of the system complexity of the quantum repeater scheme. Alternative solutions include transportable quantum memory and quantum-memory-equipped satellites, where long-lived optical quantum memories are the key components to realize global quantum communication. However, the longest storage time of the optical memories demonstrated so far is approximately 1 minute. Here, by employing a zero-first-order-Zeeman magnetic field and dynamical decoupling to protect the spin coherence in a solid, we demonstrate coherent storage of light in an atomic frequency comb memory over 1 hour, leading to a promising future for large-scale quantum communication based on long-lived solid-state quantum memories.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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One-hour coherent optical storage in an atomic frequency comb memory

Zhou

et al. 2021

Nat Commun

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146

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show abstract

“…Although hours of spin coherence time have been demonstrated, long-lived optical storage remains a challenge because of the complicated and unknown energy structures in the ZEFOZ field [9][10][11] and a reduced effective absorption in magnetic fields [12] because only one subsite can be used for the long-term storage [11]. To date, the longest optical storage time is approximately one minute realized in 87 Rb atoms [13] and a Pr 3+ :Y 2 SiO 5 crystal using the electromagnetically induced transparency (EIT) protocol [10].…”

mentioning

confidence: 99%

“…In order to implement optical storage in a ZEFOZ field, the knowledge of the energy level structures in both the ground and excited state is a prerequisite. Previous works [11,25,26] have determined the spin Hamiltonians for the ground state 7 F 0 and excited state 5 D 0 , which can be used to predict the level structures in any given magnetic field. However, the theoretical predictions may have an error comparable to the storage bandwidth and lead to a wrong choice of pumping strategies.…”

mentioning

confidence: 99%

One-hour coherent optical storage in an atomic frequency comb memory

Ma,

Zhou

et al. 2020

Preprint

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Photon loss in optical fibers prevents long-distance distribution of quantum information on the ground. A conceptually simple solution to this problem is using a transportable quantum memory, i.e. physically transporting a quantum memory which stores photonic quantum states. The required storage time would be on the order of hours while the longest optical storage time demonstrated so far is approximately one minute. Here, by employing a zero-first-order-Zeeman magnetic field and dynamical decoupling to protect the spin coherence in a solid, we demonstrate coherent storage of light in an atomic frequency comb memory over 1 hour. By combining this long-lived optical memory with high-speed trains (with a speed of 300 km/h), this scheme provides significantly enhanced data rate as compared to that relying on direct transmission in telecom optical fibers, leading to a promising future for large-scale quantum communication based on transportable quantum memories.

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Photonic Integrated Quantum Memory in Rare‐Earth Doped Solids

Zhou,

Liu,

et al. 2023

Laser & Photonics Reviews

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An optical quantum memory is a device that can store photonic quantum information and release it after a controlled time. It is an essential component for overcoming channel losses in large‐scale quantum networks. Optical quantum memories have been demonstrated with various physical systems including atomic gases, single atoms in optical cavities, and rare‐earth‐ion doped solids. Now, quantum memories are marching toward miniaturization and integration for large‐scale practical applications. Solid state systems stand as a natural choice due to the physical stability and ease of micro or nano fabrication using well‐established techniques. In the past decade, considerable efforts have been devoted to developing photonic integrated quantum memories, that is, quantum memories based on micro/nano‐photonic structures manufactured in solids. Remarkable performances have been achieved with integrated quantum memories, with the advantages of lower laser/electric power requirements, small volumes, large storage densities, and easy implementations. In this article, the basic concepts of optical quantum memories, the state‐of‐the‐art technologies for fabricating integrated quantum memories in rare‐earth ions doped crystals, and recent advances are introduced, and the roadmap for developing practically useful devices for applications in quantum networks is discussed.

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A Raman heterodyne study of the hyperfine interaction of the optically-excited state 5D0 of Eu3+:Y2SiO5

Cited by 13 publications

References 36 publications

One-hour coherent optical storage in an atomic frequency comb memory

One-hour coherent optical storage in an atomic frequency comb memory

One-hour coherent optical storage in an atomic frequency comb memory

Photonic Integrated Quantum Memory in Rare‐Earth Doped Solids

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