Pure-state single-photon wave-packet generation by parametric down-conversion in a distributed microcavity

Raymer, Michael G.; Noh, Jaewoo; Banaszek, Konrad; Walmsley, Ian A.

doi:10.1103/physreva.72.023825

Cited by 67 publications

(44 citation statements)

References 36 publications

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“…This paper extends to the process of SFWM a previous analysis from our group, see [22], of cavity-enhanced SPDC [23][24][25][26][27][28][29][30][31][32][33][34]. In our earlier paper we analyzed the spectral and temporal properties of SPDC photon pairs produced in a nonlinear cavity.…”

Section: Introductionmentioning

confidence: 55%

Theory of cavity-enhanced spontaneous four wave mixing

2012

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In this paper we study the generation of photon pairs through the process of spontaneous four wave mixing (SFWM) in a χ (3) cavity. Our key interest is the generation of photon pairs in a guidedwave configuration -fiber or waveguide -where at least one of the photons in a given pair is matched in frequency and bandwidth to a particular atomic transition, as required for the implementation of photon-atom interfaces. We present expressions, along with plots, for the two-photon joint intensity both in the spectral and temporal domains. We also present expressions for the absolute brightness, along with numerical simulations, and show that the presence of the cavity can result in a flux enhancement relative to an equivalent source without a cavity.

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Section: Introductionmentioning

confidence: 55%

Theory of cavity-enhanced spontaneous four wave mixing

2012

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“…The generation, collection, delivery and detection (fibre coupled detectors) can all be achieved in optical fibre, allowing for a truly integrated device in which the photons are emitted into a well-defined spatial mode and which is significantly easier to maintain for the end user [33,57] . A number of similar approaches have been made using waveguide sources, for both PDC [58,59] and FWM in optical fibres [52,[60][61][62] , and in recent years FWM in chip-based waveguides such as silicon photonic crystal waveguides [63,64] , chalcogenide waveguide [65] , and UV-written fused silica waveguides [66] . Although only the fibre-based source of McMillan et.…”

Section: Heralded Single Photon Sourcesmentioning

confidence: 99%

Active Multiplexing of Spectrally Engineered Heralded Single Photons in an Integrated Fibre Architecture

Francis-Jones

2017

Springer Theses

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In recent years, there has been rapid development in processing of quantum information using quantum states of light. The focus is now turning towards developing real-world implementations of technologies such as all-optical quantum computing and cryptography. The ability to consistently create and control the required single photon states of light is crucial for successful operation. Therefore, high performance single photon sources are very much in demand.The most common approach of generating the required nonclassical states of light is through spontaneous photon pair generation in a nonlinear medium. One photon in the pair is detected to "herald" the presence of the remaining single photon. For many applications the photons are required to be in pure indistinguishable states. However, photon pairs generated in this manner typically suffer from spectral correlations, which can lead to the production of mixed, distinguishable states. Additionally, these sources are probabilistic in nature, which fundamentally limits the number of photons that can be delivered simultaneously by independent sources and hence the scalability of these future technologies.One route to deterministic operation is by actively multiplexing several independent sources together to increase the probability of delivering a single photon from the system. This thesis presents the development and analysis of a multiplexing scheme of heralded single photons in high-purity indistinguishable states within an integrated optical fibre system. The spectral correlations present between the two photons in the pair were minimised by spectrally engineering each photonic crystal fibre source. A novel, in-fibre, broadband filtering scheme was implemented using photonic bandgap fibres. In total, two sources were multiplexed using a fast optical switch, yielding an 86% increase in the heralded count rate from the system. AcknowledgementsI would first like to express my gratitude to my supervisor Dr. Peter Mosley, for giving me the opportunity to work with him on an exciting and interesting project, and for first introducing me to the world of quantum optics in the final year of my undergraduate degree. Without his support and guidance over the last three years, this thesis and the work that it contains would not have been possible. It has been a tremendously enjoyable learning experience (for both of us I hope!), and I think I can safely say that I now know more about FPGAs than I ever thought or hoped I would! I am incredibly grateful for the opportunity, and eagerly look forward to continue working with you on the upcoming NQIT project.Secondly, I would like to thank all of the staff and students, past and present, of the Centre for Photonics and Photonic Materials for providing an enjoyable, interesting and supportive learning environment. I would particularly like to thank James, for casting his eye over my fibre designs, passing down his fabrication knowledge, and teaching me the dark art of the dispersion rig! I would also especially like to ...

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“…One of them is a single photon state [12][13][14]. About the methods of its generation and application in quantum of computing and communication one can read in [15][16][17][18][19][20][21][22]. The filtering equation for quantum system interacting with the environment prepared in the single photon state was derived in [23][24][25][26].…”

Section: Pacs Numbersmentioning

confidence: 99%

Quantum trajectories for a system interacting with environment in a single-photon state: Counting and diffusive processes

2017

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We derived quantum trajectories for a system interacting with the environment prepared in a continuous mode single photon state as the limit of discrete filtering model with an environment defined as series of independent qubits prepared initially in the entangled state being an analogue of a continuous mode state. The environment qubits interact with the quantum system and they are subsequently measured. The initial correlation between the bath qubits is the source of the non-Markovianity. The conditional evolutions of the quantum system for limit of the continuous in time observations together with the formulas for the photon counting probabilities are given.

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Pure-state single-photon wave-packet generation by parametric down-conversion in a distributed microcavity

Cited by 67 publications

References 36 publications

Theory of cavity-enhanced spontaneous four wave mixing

Theory of cavity-enhanced spontaneous four wave mixing

Active Multiplexing of Spectrally Engineered Heralded Single Photons in an Integrated Fibre Architecture

Quantum trajectories for a system interacting with environment in a single-photon state: Counting and diffusive processes

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