Quantum teleportation-based state transfer of photon polarization into a carbon spin in diamond

Tsurumoto, Kazuya; Kuroiwa, Ryota; Kano, Hiroki; Sekiguchi, Yuhei; Kosaka, Hideo

doi:10.1038/s42005-019-0158-0

Cited by 33 publications

(24 citation statements)

References 32 publications

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“…, which caps the success rate of the protocol at 25%. The problem of how to realize a complete BSM has no easy solution 37,38 , but the performance of the protocol can be improved with common linear optical elements 39,40 . The approach consists of adding two polarizing beam splitters at the output ports of the non-polarizing beam splitter, as illustrated in the main part of Fig.…”

Section: Resultsmentioning

confidence: 99%

Quantum teleportation with imperfect quantum dots

et al. 2021

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Efficient all-photonic quantum teleportation requires fast and deterministic sources of highly indistinguishable and entangled photons. Solid-state-based quantum emitters—notably semiconductor quantum dots—are a promising candidate for the role. However, despite the remarkable progress in nanofabrication, proof-of-concept demonstrations of quantum teleportation have highlighted that imperfections of the emitter still place a major roadblock in the way of applications. Here, rather than focusing on source optimization strategies, we deal with imperfections and study different teleportation protocols with the goal of identifying the one with maximal teleportation fidelity. Using a quantum dot with sub-par values of entanglement and photon indistinguishability, we show that the average teleportation fidelity can be raised from below the classical limit to 0.842(14), adopting a polarization-selective Bell state measurement and moderate spectral filtering. Our results, which are backed by a theoretical model that quantitatively explains the experimental findings, loosen the very stringent requirements set on the ideal entangled-photon source and highlight that imperfect quantum dots can still have a say in teleportation-based quantum communication architectures.

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Section: Resultsmentioning

confidence: 99%

Quantum teleportation with imperfect quantum dots

et al. 2021

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“…The number of quantum states that can be stored and processed is presently limited. Experimental information processing platforms that have demonstrated excellent control over storage qubits include NV centers in diamond [19,30,45,[50][51][52][53], neutral atoms [31,32], non-NV color centers in diamond [54,55], quantum dots [56][57][58], and trapped ions [26][27][28].…”

Section: A Quantum Repeaters Based On Information Processing Platformsmentioning

confidence: 99%

“…However, the number of quantum states that can be processed at the same time is presently limited to a small number. Examples of information processing implementations include systems such as trapped ions [26][27][28], nitrogen-vacancy (NV) centers in diamond [29,30], neutral atoms [31][32][33], and quantum dots [34,35].…”

Section: Introductionmentioning

confidence: 99%

Optimizing repeater schemes for the quantum internet

2021

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The rate at which quantum communication tasks can be performed using direct transmission is fundamentally hindered by the channel loss. Quantum repeaters allow one, in principle, to overcome these limitations, but their introduction necessarily adds an additional layer of complexity to the distribution of entanglement. This additional complexity-along with the stochastic nature of processes such as entanglement generation, Bell swaps, and entanglement distillation-makes finding good quantum repeater schemes nontrivial. We develop an algorithm that can efficiently perform a heuristic optimization over a subset of quantum repeater schemes for general repeater platforms. We find a strong improvement in the generation rate in comparison to an optimization over a simpler class of repeater schemes based on BDCZ (Briegel, Dür, Cirac, Zoller) repeater schemes. We use the algorithm to study three different experimental quantum repeater implementations on their ability to distribute entanglement, which we dub information processing implementations, multiplexed elementary pair generation implementations, and combinations of the two. We perform this heuristic optimization of repeater schemes for each of these implementations for a wide range of parameters and different experimental settings. This allows us to make estimates on what are the most critical parameters to improve for entanglement generation, how many repeaters to use, and which implementations perform best in their ability to generate entanglement.

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“…In this way, the researchers plan to achieve further advances toward quantum computing, Fig. 9 [21].…”

Section: Teleportation Transportmentioning

confidence: 99%

Teleportation; Next Leap to Outer Space

Elbehiery

2021

Digital Transformation Technology

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Going to space and in particular to the moon was the distinguished accomplishment of mankind for the twentieth century; however, teleportation and in particular, human teleportation is going to be the greatest achievement of all human being knowledge combined for the twenty-first century. The simple scientific definition of teleportation is when an object or a person be transported through a machine or a device and ends up reappearing at a different place. It all starts from the human brain which is very complex organ and in particular the human consciousness which is considered mathematically complicated. Consequently, many questions arise, could the human consciousness be decoded and mapped, could it be transported to an android or an avatar along with human's mind thoughts, is the quantum mechanics and computing is the methodology to achieve teleportation. On the other hand, the visionaries who changed our technological history might have been humans have crossed to other universes or they could be teleported humans from other universes. Lastly, if the human teleportation is a possibility, will it face any physical or moral challenges. Significant questions indeed and fortunately, this research paper intend to answer all of them. It is worth it to mention that Albert Einstein claimed that humans are theoretically capable of time travel or being teleported.

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Quantum teleportation-based state transfer of photon polarization into a carbon spin in diamond

Cited by 33 publications

References 32 publications

Quantum teleportation with imperfect quantum dots

Quantum teleportation with imperfect quantum dots

Optimizing repeater schemes for the quantum internet

Teleportation; Next Leap to Outer Space

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