Active Temporal Multiplexing of Photons

Mendoza, Gabriel; Santagati, Raffaele; Munns, Jack; Hemsley, Elizabeth; Piekarek, Mateusz; Martín-López, Enrique; Marshall, Graham D.; Bonneau, Damien; Thompson, Mark G.; O’Brien, Jeremy L

doi:10.48550/arxiv.1503.01215

Cited by 3 publications

(3 citation statements)

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“…High fidelity, high efficiency, ondemand single photon sources still remain the Achilles heel of the technology. There are generally two approaches: using an atomic based photon emitter to produce on demand-photons [62,63,64,65], or using Spontaneous Parametric Down Conversion sources (SPDCs) and optical switching to create a multiplexed source [66,67]. Using multiplexed sources translates the source problem into constructing very low loss, single-photon switches [68], which is the focus of current research.…”

Section: Linear Opticsmentioning

confidence: 99%

Local and Distributed Quantum Computation

Van Meter,

Devitt

2016

Preprint

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Experimental groups are now fabricating quantum processors powerful enough to execute small instances of quantum algorithms and definitively demonstrate quantum error correction that extends the lifetime of quantum data, adding urgency to architectural investigations. Although other options continue to be explored, effort is coalescing around topological coding models as the most practical implementation option for error correction on realizable microarchitectures. Scalability concerns have also motivated architects to propose distributed memory multicomputer architectures, with experimental efforts demonstrating some of the basic building blocks to make such designs possible. We compile the latest results from a variety of different systems aiming at the construction of a scalable quantum computer.

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Section: Linear Opticsmentioning

confidence: 99%

Local and Distributed Quantum Computation

Van Meter,

Devitt

2016

Preprint

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“…The need for low-loss active switching or synchronisation of non-deterministic operations in a linear-optical quantum information processor has emerged over the past few years as a sine qua non for the development of large-scale photonics-based quantum technologies [1][2][3][4][5]. Experiments with optical switches are making rapid progress [6][7][8][9]. Quantum memories based on the coherent and reversible absorption of photons in an atomic ensemble are being developed by many groups as an alternative to optical switching [10][11][12][13][14], with impressive demonstrations of the preservation of quantum correlations and of temporal synchronisation of photons, using cold atoms [15] and cold doped crystals [16].…”

Section: Introductionmentioning

confidence: 99%

Theory of noise suppression inΛ-type quantum memories by means of a cavity

et al. 2017

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Quantum memories, capable of storing single photons or other quantum states of light, to be retrieved on-demand, offer a route to large-scale quantum information processing with light. A promising class of memories is based on far-off-resonant Raman absorption in ensembles of Λ-type atoms. However at room temperature these systems exhibit unwanted four-wave mixing, which is prohibitive for applications at the single-photon level. Here we show how this noise can be suppressed by placing the storage medium inside a moderate-finesse optical cavity, thereby removing the main roadblock hindering this approach to quantum memory.

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“…Alternatively, one can combine the output from different temporal modes of the same source, bringing an overhead cost only in time and not in additional physical resources [10][11][12][13][14]. In this letter, we present a novel multiplexing scheme in the temporal domain based on a fibre loop that uses only a single optical switch and delay line.…”

mentioning

confidence: 99%

Temporal Loop Multiplexing: A resource efficient scheme for multiplexed photon-pair sources

Francis-Jones,

Mosley

2015

Preprint

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Single photons are a vital resource for photonic quantum information processing. However, even state-of-the-art single photon sources based on photon-pair generation and heralding detection have only a low probability of delivering a single photon when one is requested. We analyse a scheme that uses a switched fibre delay loop to increase the delivery probability per time bin of single photons from heralded sources. We show that, for realistic experimental parameters, combining the output of up to 15 pulses can yield a performance improvement of a factor of 10. We consider the future performance of this scheme with likely component improvements.

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Active Temporal Multiplexing of Photons

Cited by 3 publications

References 0 publications

Local and Distributed Quantum Computation

Local and Distributed Quantum Computation

Theory of noise suppression inΛ-type quantum memories by means of a cavity

Temporal Loop Multiplexing: A resource efficient scheme for multiplexed photon-pair sources

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