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Title: Frequency-encoded photonic qubits for scalable quantum information processing

Abstract

Among the objectives for large-scale quantum computation is the quantum interconnect: a device that uses photons to interface qubits that otherwise could not interact. However, the current approaches require photons indistinguishable in frequency—a major challenge for systems experiencing different local environments or of different physical compositions altogether. Here, we develop an entirely new platform that actually exploits such frequency mismatch for processing quantum information. Labeled “spectral linear optical quantum computation” (spectral LOQC), our protocol offers favorable linear scaling of optical resources and enjoys an unprecedented degree of parallelism, as an arbitrary Ν-qubit quantum gate may be performed in parallel on multiple Ν-qubit sets in the same linear optical device. Here, not only does spectral LOQC offer new potential for optical interconnects, but it also brings the ubiquitous technology of high-speed fiber optics to bear on photonic quantum information, making wavelength-configurable and robust optical quantum systems within reach.

Authors:
 [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1337503
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Optica
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2334-2536
Publisher:
Optical Society of America
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING; quantum information and processing; optical interconnects; pulse shaping; phase modulation

Citation Formats

Lukens, Joseph M., and Lougovski, Pavel. Frequency-encoded photonic qubits for scalable quantum information processing. United States: N. p., 2016. Web. https://doi.org/10.1364/OPTICA.4.000008.
Lukens, Joseph M., & Lougovski, Pavel. Frequency-encoded photonic qubits for scalable quantum information processing. United States. https://doi.org/10.1364/OPTICA.4.000008
Lukens, Joseph M., and Lougovski, Pavel. Wed . "Frequency-encoded photonic qubits for scalable quantum information processing". United States. https://doi.org/10.1364/OPTICA.4.000008. https://www.osti.gov/servlets/purl/1337503.
@article{osti_1337503,
title = {Frequency-encoded photonic qubits for scalable quantum information processing},
author = {Lukens, Joseph M. and Lougovski, Pavel},
abstractNote = {Among the objectives for large-scale quantum computation is the quantum interconnect: a device that uses photons to interface qubits that otherwise could not interact. However, the current approaches require photons indistinguishable in frequency—a major challenge for systems experiencing different local environments or of different physical compositions altogether. Here, we develop an entirely new platform that actually exploits such frequency mismatch for processing quantum information. Labeled “spectral linear optical quantum computation” (spectral LOQC), our protocol offers favorable linear scaling of optical resources and enjoys an unprecedented degree of parallelism, as an arbitrary Ν-qubit quantum gate may be performed in parallel on multiple Ν-qubit sets in the same linear optical device. Here, not only does spectral LOQC offer new potential for optical interconnects, but it also brings the ubiquitous technology of high-speed fiber optics to bear on photonic quantum information, making wavelength-configurable and robust optical quantum systems within reach.},
doi = {10.1364/OPTICA.4.000008},
journal = {Optica},
number = 1,
volume = 4,
place = {United States},
year = {2016},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
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Citation Metrics:
Cited by: 9 works
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Figures / Tables:

Fig. 1. Fig. 1.: Building blocks for spectral LOQC. (a) Dual-rail qubit encoding. A single photon corresponds to |0〉L or |1〉L depending on which one of two modes it occupies. (b) Fourier-transform pulse shaper. This applies arbitrary phases to each spectral mode, physically by separating and recombining frequency components (left) and conceptuallymore » as a multimode element operating on all rails individually (right). (c) Electro-optic phase modulator. This device (left) applies an arbitrary temporal phase periodic at the inverse mode spacing . In rail form, the modulator acts as mode mixer which can move photons across frequency states (right). The labels A0 and A1 mark the zero and one modes for a representative qubit.« less

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