Telecom-band hyperentangled photon pairs from a fiber-based source

Chen, Changjia; Xu, Calvin; Riazi, Arash; Zhu, Eric Y.; Greenwood, Alexander C. B.; Gladyshev, Alexey V.; Kazansky, Peter G.; Kirby, Brian T.; Qian, Li

doi:10.1103/physreva.105.043702

Cited by 11 publications

(4 citation statements)

References 29 publications

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“…As shown in Fig. 4, we propose to use a periodically poled silica fiber (PPSF) [26] to produce highly entangled ponton pairs in these two DoFs [22], [23], [24]. An effective second-order nonlinearity χ (2) is artificially induced along the PPSF through the process of thermal poling, and the quasi-phase-matching allows for the direct generation of polarization-entangled photon pairs in PPSF at room temperature by exploiting type-II phase-matched SPDC [26], [22].…”

Section: Proposed Implementationmentioning

confidence: 99%

“…frequency, time-bin, polarization, orbital angular momentum), significantly expands the dimensionality of the Hilbert space of biphotons [19], [20], [21]. In practice, hyperentanglement can be naturally produced in certain spontaneous parametric downconversion (SPDC) processes [22], [23], [24]. By constructing a "CNOT" gate between different degrees of freedom (DoFs), e.g., between polarization and spatial-mode or between polarization and energy-time DoFs, the entanglement in the latter DoF can be sacrificed to distill the polarization entanglement.…”

Section: Introductionmentioning

confidence: 99%

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Entanglement Distillation Based on Polarization and Frequency Hyperentanglement

Xu,

Chen,

Kirby

et al. 2024

IEEE J. Select. Topics Quantum Electron.

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Entanglement distillation has many applications in quantum information processing and is an important tool for improving the quality and efficiency of quantum communication, cryptography, computing, and simulation. We propose an entanglement distillation scheme using only one pair of polarizationfrequency hyperentangled photons, which can be equivalently viewed as containing two pairs of entangled logical qubits: a pair of polarization-entangled qubits and a pair of frequencyentangled qubits. To perform the required CNOT operation between the two qubits we consider the use of a polarizationdependent frequency converter. Compared to past methods of entanglement distillation that relied on polarization and spatialmode/energy-time degree of freedom, the utilization of frequencyencoded qubits offers an advantage in that it is immune to bit-flip errors when the channel is linear. After distillation, the fidelity of polarization entanglement can be significantly improved by sacrificing the frequency degree of freedom. Through simulation, we show that high fidelity gains, large yield, and high distillation rate can be achieved. Our distillation scheme is simple to implement with current technologies, compatible with existing telecommunication fiber networks, and is a promising approach for achieving efficient quantum communication.

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Section: Proposed Implementationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Entanglement Distillation Based on Polarization and Frequency Hyperentanglement

Xu,

Chen,

Kirby

et al. 2024

IEEE J. Select. Topics Quantum Electron.

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“…Currently, the QNOL facility lacks a Hong-Ou-Mandel interferometer 97 lab (two-photon quantum interference on a beam-splitter), which will be built in the future in combination with entanglement setup. Using a poled fiber phase matched for type II downconversion 98 can significantly simplify alignment of entanglement setup. Currently, a Hong-Ou-Mandel effect is discussed only in lectures both in advanced QNOL classes and required for optics major OPT 204 class.…”

Section: Conclusion: Lessons Learned and Future Plansmentioning

confidence: 99%

Fifteen years of quantum optics, quantum information, and nano-optics educational facility at the Institute of Optics, University of Rochester

Lukishova

2022

Opt. Eng.

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The quantum optics/quantum information and nano-optics educational laboratory facility (QNOL) at the University of Rochester (UR) is located within three rooms of the Institute of Optics with a total area of 587 ft 2 . It has been used for teaching a 4-credit-hour QNOL class annually for 15 years. Four teaching labs were prepared on the generation and characterization of entangled and single (antibunched) photons demonstrating the laws of quantum mechanics: (1) entanglement and Bell's inequalities, (2) single-photon interference (Young's double slit experiment and Mach-Zehnder interferometer), (3) single-photon source I: confocal fluorescence microscopy of single nanoemitters, and (4) single-photon source II: a Hanbury Brown and Twiss setup, fluorescence antibunching. Further, based on QNOL, 1.5 to 3 h sturdy quantum "mini-labs" were developed and introduced into the required classes such that all optics students at the UR had experience with quantum labs. Monroe Community College (MCC) students participated in two mini-labs at the UR. Since 2006 to spring 2022, a total of ~850 students have utilized the labs for lab report submission (including 144 MCC students) and more than 250 students have used them for lab demonstrations. In addition, UR freshman research projects have become a very important educational activity in this facility. All developed materials and students' reports are available at http://www.optics.rochester.edu/ workgroups/lukishova/QuantumOpticsLab/. We present a description of sturdy, universally accessible experiments that can be introduced into either a separate advanced class or into classes with a large number of students. Assessment methods, evaluation of students' knowledge, and their attitude toward their career in quantum information are discussed.

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“…The polarization DoF is a staple of quantum optics due to the ease of manipulation and measurement, while the frequency DoF can facilitate deterministic splitting of the photon pairs and various bandwidth allocation and distribution schemes. Such sources have been explored in various material platforms including periodically poled lithium niobate (PPLN) waveguides [6][7][8][9][10][11][12][13][14][15], periodically poled silica fibers [16,17], and semiconductor chips [18,19]. In order to characterize the quality of the entanglement, a common technique is to utilize tunable filters to select a few channel pairs across the spectrum and perform quantum state tomography (QST) [6,15,16].…”

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confidence: 99%

Broadband polarization-entangled source for C+L-band flex-grid quantum networks

Alshowkan¹,

Lukens²,

Lu³

et al. 2022

Preprint

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has been co-authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

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Telecom-band hyperentangled photon pairs from a fiber-based source

Cited by 11 publications

References 29 publications

Entanglement Distillation Based on Polarization and Frequency Hyperentanglement

Entanglement Distillation Based on Polarization and Frequency Hyperentanglement

Fifteen years of quantum optics, quantum information, and nano-optics educational facility at the Institute of Optics, University of Rochester

Broadband polarization-entangled source for C+L-band flex-grid quantum networks

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