Realization of Reliable Solid-State Quantum Memory for Photonic Polarization Qubit

Zhou, Zong‐Quan; Lin, Weibin; Yang, Ming; Li, Chuan‐Feng; Guo, Guang‐Can

doi:10.1103/physrevlett.108.190505

Cited by 129 publications

(81 citation statements)

References 36 publications

(47 reference statements)

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“…This configuration compensates for the polarization-dependent absorption of a single crystal [23][24][25] . The absorption bandwidth of the quantum memory is 600 MHz and stores photons for 50 ns with an overall efficiency of 5% using the atomic frequency comb (AFC) storage protocol 16 .…”

mentioning

confidence: 96%

Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory

et al. 2014

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Quantum teleportation1 is a cornerstone of quantum information science due to its essential role in important tasks such as the long-distance transmission of quantum information using quantum repeaters2, 3. This requires the efficient distribution of entanglement between remote nodes of a network4. Here, we demonstrate quantum teleportation of the polarization state of a telecom-wavelength photon onto the state of a solid-state quantum memory. Entanglement is established between a rare-earth-ion-doped crystal storing a single photon that is polarization-entangled with a flying telecom-wavelength photon5, 6. The latter is jointly measured with another flying polarization qubit to be teleported, which heralds the teleportation. The fidelity of the qubit retrieved from the memory is shown to be greater than the maximum fidelity achievable without entanglement, even when the combined distances travelled by the two flying qubits is 25 km of standard optical fibre. Our results demonstrate the possibility of long-distance quantum networks with solid-state resources

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mentioning

confidence: 96%

Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory

et al. 2014

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“…Following the first storage experiment at the single-photon level [19], a succession of experiments demonstrated storage of single photons [20,21] and generation of light-matter [15,16] and matter-matter entanglement using crystals [22]. The quantum memory performances have also been strongly developed, particularly in terms of storage efficiency [23,24], multimode capacity [25,26], and polarization qubit storage [21,27,28].…”

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confidence: 99%

Single-photon-level optical storage in a solid-state spin-wave memory

et al. 2013

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A long-lived quantum memory is a firm requirement for implementing a quantum repeater scheme. Recent progress in solid-state rare-earth-ion-doped systems justifies their status as very strong candidates for such systems. Nonetheless an optical memory based on spin-wave storage at the single-photon level has not been shown in such a system to date, which is crucial for achieving the long storage times required for quantum repeaters. In this paper we show that it is possible to execute a complete atomic frequency comb (AFC) scheme, including spin-wave storage, with weak coherent pulses ofn = 2.5 ± 0.6 photons per pulse. We discuss in detail the experimental steps required to obtain this result and demonstrate the coherence of a stored time-bin pulse. We show a noise level of (7.1 ± 2.3) × 10 −3 photons per mode during storage, and this relatively low noise level paves the way for future quantum optics experiments using spin waves in rare-earth-doped crystals.

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“…The storage of polarization qubits in rare-earth-ion doped crystals is therefore hindered by their polarization-dependent optical depth. It is, however, possible to mitigate this problem, as demonstrated in [30][31][32]. Specifically, consider a crystal cut such that its input face contains two principal axes of the dielectric tensor; see Fig.…”

Section: Multimode and Polarization-preserving Broadband Quantum Memorymentioning

confidence: 99%

Storage of hyperentanglement in a solid-state quantum memory

Tiranov¹,

Lavoie²,

Ferrier³

et al. 2015

Optica

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Two photons can simultaneously share entanglement between several degrees of freedom such as polarization, energy-time, spatial mode, and orbital angular momentum. This resource is known as hyperentanglement, and it has been shown to be an important tool for optical quantum information processing. Here we demonstrate the quantum storage and retrieval of photonic hyperentanglement in a solid-state quantum memory. A pair of photons entangled in polarization and energy-time is generated such that one photon is stored in the quantum memory, while the other photon has a telecommunication wavelength suitable for transmission in optical fiber. We measured violations of a Clauser-Horne-Shimony-Holt Bell inequality for each degree of freedom, independently of the other one, which proves the successful storage and retrieval of the two bits of entanglement shared by the photons. Our scheme is compatible with long-distance quantum communication in optical fiber, and is in particular suitable for linear-optical entanglement purification for quantum repeaters.

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Realization of Reliable Solid-State Quantum Memory for Photonic Polarization Qubit

Cited by 129 publications

References 36 publications

Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory

Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory

Single-photon-level optical storage in a solid-state spin-wave memory

Storage of hyperentanglement in a solid-state quantum memory

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