Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1812.03126 · Optics Letters

Polarization diversity phase modulator for measuring frequency-bin entanglement of a biphoton frequency comb in a depolarized channel

Oscar E. Sandoval, Navin B. Lingaraju, Poolad Imany, Daniel E. Leaird, Michael Brodsky, Andrew M. Weiner

Published Mar 21, 2019• 10 citations
arXivHTMLPDF

Abstract

Phase modulation has emerged as a technique to create and manipulate high-dimensional frequency-bin entanglement. A necessary step to extending this technique to depolarized channels, such as those in a quantum networking environment, is the ability to perform phase modulation independent of photon polarization. This is also necessary to harness hyperentanglement in the polarization and frequency degrees of freedom for operations such as Bell state discrimination. However, practical phase modulators are generally sensitive to the polarization of light, and this makes them unsuited to such applications. We overcome this limitation by implementing a polarization diversity scheme to measure frequency-bin entanglement for arbitrary orientations of co- and cross-polarized time-energy entangled photon pairs.

DOI
10.1364/ol.44.001674

Related papers

Polarization diversity phase modulator for measuring frequency-bin entanglement of biphoton frequency combs in in a depolarized channel

Oscar E. Sandoval, Navin B. Lingaraju, Poolad Imany +3 more

We report frequency-bin entanglement measurements of arbitrarily polarized photon pairs using a polarization diversity phase modulator, thereby extending this technique to depolarized channels such as in a practical quantum networking environment.

Frontiers in Optics•Jan 1, 2018•0 citations

Measuring Frequency-Bin Entanglement in Depolarized Biphoton Frequency Combs

Oscar E. Sandova, Navin B. Lingaraju, Poolad Imany +3 more

A polarization diversity phase modulator capable of measuring frequency-bin entanglement, irrespective of polarization fluctuations and the relative orientation between the signal and idler photons, is demonstrated. © 2019 The Author(s)

Conference on Lasers and Electro-Optics•May 1, 2019•0 citations

Polarization diversity phase modulator for frequency-bin operations with hyperentangled biphoton frequency combs

Navin B. Lingaraju, Nathan P. O’Malley, Daniel E. Jones +6 more

Using a polarization diversity phase modulator, we carry out projective measurements in the spectral domain to characterize frequency-bin entanglement in a hyperentangled photon pair without degrading nonclassical correlations in polarization state.

Conference on Lasers and Electro-Optics•Jan 1, 2020•0 citations

Harnessing entanglement in polarization state and frequency-bin for quantum communication and networking

Navin B. Lingaraju, Nathan P. O’Malley, Daniel E. Jones +6 more

We highlight the potential of hyperentangled biphoton frequency combs for quantum communications and networking by implementing frequency-bin quantum operations without degrading entanglement in the polarization degree of freedom.

OSA Quantum 2.0 Conference•Jan 1, 2020•0 citations

Polarization–frequency hyperentangled photons: generation, characterization, and manipulation

Hsuan‐Hao Lu, Joseph M. Lukens, Karthik V. Myilswamy +4 more

Frequency-bin encoding is massively parallelizable and robust for optical fiber transmission. When coupled with an additional degree of freedom (DoF), the expansion of the Hilbert space allows for deterministic controlled operations between two DoFs within a single photon. Such capabilities, when combined with photonic hyperentanglement, are of great value for quantum communication protocols, including dense coding and single-copy entanglement distillation. In this talk, we present an all-fiber-coupled, ultrabroadband polarization–frequency hyperentangled source and conduct comprehensive quantum state tomography across multiple dense wavelength division multiplexing channels spanning the optical C+L-band (1530–1625 nm). In addition, we design and implement a high-fidelity controlled-NOT (cnot) operation between polarization and frequency DoFs by exploiting electro-optic phase modulation within a fiber Sagnac loop. Collectively, our hyperentangled source and two-qubit gate should unlock new opportunities for harnessing polarization–frequency resources in established telecommunication fiber networks for future quantum applications.

SPIE Quantum Information Science, Sensing, and Computation•Jun 7, 2024•1 citation

Polarization-path-frequency entanglement using interferometry and frequency shifters

Mrittunjoy Guha Majumdar, C. M. Chandrashekar

Abstract Higher dimensional Hilbert space along with ability to control multiple degrees of freedom of photon and entangle them has enabled new quantum protocols for various quantum information processing applications. Here, we propose a scheme to generate and control polarization-path-frequency entanglement using the operative elements required to implement a polarization-controlled quantum walk in the path (position) space and frequency domain. Hyperentangled states manifests in the controlled dynamics using an interferometric setup where half-wave plates, beam-splitters and frequency shifters such as those based on the electro-optic effect are used to manipulate the polarization, path and frequency degrees of freedom respectively. The emphasis is on utilizing the polarization to influence the movement to a specific value in the frequency and position space. Negativity between the subspaces is calculated to demonstrate the controllability of the entanglement between the three degrees of freedom and the effect of noise on the entanglement is modelled using the depolarizing channel. Progress reported with experimental demonstration of realization of quantum walk using quantum states of light makes quantum walks a practical approach to generate hyperentangled states.

arXiv:2112.01532•Journal of Physics B Atomic Molecular and Optical Physics•Feb 7, 2022•2 citations
Phase modulation has emerged as a technique to create and manipulate high-dimensional frequency-bin entanglement. A necessary step to extending this technique to depolarized channels, such as those in a quantum networking environment, is the ability to perform phase modulation independent of photon polarization. This is also necessary to harness hyperentanglement in the polarization and frequency degrees of freedom for operations such as Bell state discrimination. However, practical phase modulators are generally sensitive to the polarization of light, and this makes them unsuited to such applications. We overcome this limitation by implementing a polarization diversity scheme to measure frequency-bin entanglement for arbitrary orientations of co- and cross-polarized time-energy entangled photon pairs.
Frequency-bin encoding is massively parallelizable and robust for optical fiber transmission. When coupled with an additional degree of freedom (DoF), the expansion of the Hilbert space allows for deterministic controlled operations between two DoFs within a single photon. Such capabilities, when combined with photonic hyperentanglement, are of great value for quantum communication protocols, including dense coding and single-copy entanglement distillation. In this talk, we present an all-fiber-coupled, ultrabroadband polarization–frequency hyperentangled source and conduct comprehensive quantum state tomography across multiple dense wavelength division multiplexing channels spanning the optical C+L-band (1530–1625 nm). In addition, we design and implement a high-fidelity controlled-NOT (cnot) operation between polarization and frequency DoFs by exploiting electro-optic phase modulation within a fiber Sagnac loop. Collectively, our hyperentangled source and two-qubit gate should unlock new opportunities for harnessing polarization–frequency resources in established telecommunication fiber networks for future quantum applications.
Abstract Higher dimensional Hilbert space along with ability to control multiple degrees of freedom of photon and entangle them has enabled new quantum protocols for various quantum information processing applications. Here, we propose a scheme to generate and control polarization-path-frequency entanglement using the operative elements required to implement a polarization-controlled quantum walk in the path (position) space and frequency domain. Hyperentangled states manifests in the controlled dynamics using an interferometric setup where half-wave plates, beam-splitters and frequency shifters such as those based on the electro-optic effect are used to manipulate the polarization, path and frequency degrees of freedom respectively. The emphasis is on utilizing the polarization to influence the movement to a specific value in the frequency and position space. Negativity between the subspaces is calculated to demonstrate the controllability of the entanglement between the three degrees of freedom and the effect of noise on the entanglement is modelled using the depolarizing channel. Progress reported with experimental demonstration of realization of quantum walk using quantum states of light makes quantum walks a practical approach to generate hyperentangled states.