CW-pumped telecom band polarization entangled photon pair generation in a Sagnac interferometer

Li, Yan; Zhou, Zhi-Yuan; Ding, Dong-Sheng; Shi, Bao‐Sen

doi:10.1364/oe.23.028792

Cited by 60 publications

(47 citation statements)

References 41 publications

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“…In this work, we elaborate upon results from two previous proof-in-principle experiments, and explore how the PoE mining protocol may be readily implemented with a Sagnac interferometer, 45,46,47 functioning, in this case, as a quantum server. The role of the quantum server is to generate entanglement, encoded in photonic qubits, which is sent to clients on the network via direct fibre link.…”

Section: Introductionmentioning

confidence: 99%

Energy-Efficient Mining on a Quantum-Enabled Blockchain Using Light

Bennet¹,

Daryanoosh²

2019

ledger

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We outline a quantum-enabled blockchain architecture based on a consortium of quantum servers. The network is hybridised, utilising digital systems for sharing and processing classical information combined with a fibre-optic infrastructure and quantum devices for transmitting and processing quantum information. We deliver an energy efficient interactive mining protocol enacted between clients and servers which uses quantum information encoded in light and removes the need for trust in network infrastructure. Instead, clients on the network need only trust the transparent network code, and that their devices adhere to the rules of quantum physics. To demonstrate the energy efficiency of the mining protocol, we elaborate upon the results of two previous experiments (one performed over 1km of optical fibre) as applied to this work. Finally, we address some key vulnerabilities, explore open questions, and observe forward-compatibility with the quantum internet and quantum computing technologies.KEY WORDS 1. quantum information 2. quantum blockchain 3. quantum optics 4. entanglement * A. J. Bennet is an independent researcher in Melbourne, Australia. † S. Daryanoosh is a post-doctoral researcher at

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Section: Introductionmentioning

confidence: 99%

Energy-Efficient Mining on a Quantum-Enabled Blockchain Using Light

Bennet¹,

Daryanoosh²

2019

ledger

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“…Different methods from nonlinear optics, such as spontaneous parametric downconversion (SPDC) and spontaneous four-wave mixing (SFWM), have been employed to generate correlated photon pairs. SPDC sources with short crystals [6][7][8][9][10][11] and SFWM sources, for example in optical fibers [12,13], employ short-pulse pump lasers propagating through nonlinear optical media. The simplicity of these schemes results from the weak requirements regarding phase matching and leads to correlated photon pair emission in a broad bandwidth of several THz.…”

Section: Introductionmentioning

confidence: 99%

Correlated photon-pair generation in a liquid-filled microcavity

2019

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We report on the realization of a liquid-filled optical microcavity and demonstrate photon-pair generation by spontaneous four-wave mixing. Our source has a spectral brightness of 45±7 mW −2 s −1 MHz −1 and the bandwidth of the emitted photons is ∼300 MHz. We demonstrate tuning of the emission wavelength between 770 and 800 nm. Moreover, by employing a liquid as the nonlinear optical medium completely filling the microcavity, we observe more than a factor 10 3 increase of the pair correlation rate per unit pump power and a factor of 1.7 improvement in the coincidence/accidental ratio as compared to our previous measurements.

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“…As a key resource in quantum information science, entanglement has broad applications in quantum communications, quantum computation, quantum-enhanced metrology, and in the study of fundamental physics in quantum mechanics [1,2]. Usually entanglement can be generated from nonlinear processes such as spontaneous parametric down conversion (SPDC) [3][4][5] and spontaneous four wave mixing (SFWM) [6][7][8][9][10] in various physical systems. Because energy, momentum, and angular momentum are conserved, entanglement can be established between photons in their different degrees of freedoms.…”

Section: Introductionmentioning

confidence: 99%

On-Chip Multiplexed Multiple Entanglement Sources in a Single Silicon Nanowire

Zhou

Feng

et al. 2017

Phys. Rev. Applied

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The silicon-on-chip (SOI) photonic circuit is a very promising platform for scalable quantum information technology for its low loss, small footprint, and its compatibility with CMOS as well as telecom communications techniques. Multiple multiplexed entanglement sources, including energytime, time-bin, and polarization-entangled sources based on 1-cm-length single-silicon nanowire, are all compatible with the (100-GHz) dense-wave-division-multiplexing (DWDM) system. Different methods, such as two-photon interference as well as Bell-inequality and quantum-state tomography, are used to characterize the quality of these entangled sources. Multiple entanglements are generated over more than five channel pairs with high raw (net) visibilities of around 97% (100%). The emission spectral brightness of these entangled sources reaches 4.210 5 /(s.nm.mW). The quality of the photon pair generated in continuous and pulse pump regimes are compared. The high quality of these multiplexed-entanglement sources makes them very promising for use in minimized quantum communications and computation systems.

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CW-pumped telecom band polarization entangled photon pair generation in a Sagnac interferometer

Cited by 60 publications

References 41 publications

Energy-Efficient Mining on a Quantum-Enabled Blockchain Using Light

Energy-Efficient Mining on a Quantum-Enabled Blockchain Using Light

Correlated photon-pair generation in a liquid-filled microcavity

On-Chip Multiplexed Multiple Entanglement Sources in a Single Silicon Nanowire

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