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

Journal of Physics Conference Series

Application of quantum control techniques to design broadband and ultra-broadband half-wave plates

Wei Huang, Elica S. Kyoseva

Published Sep 1, 2016• 3 citations
Publisher

Abstract

Broadband and ultra-broadband half-wave plates with composite design were previously experimentally demonstrated by E. Dimova et. al. , in Opt. Commun. 366 , 382 (2016). To achieve broadband and ultra-broadband performance, the authors utilized the relative rotation between the individual identical half-wave plates as control parameters, thus simulating the well-known control technique of composite pulses from quantum optics. In this paper, we extend the broadband and ultra-broadband designs by relaxing the condition of having identical constituent half-wave plates and allow for their thicknesses to also be variable control parameters. We further relax the condition of having symmetric rotation angles and solve numerically for both control parameters - rotation angles and thicknesses of the birefringent plates. We show that the presented design is broadband over a much wider range of the wavelengths, compared to the original design, when using the same number of constituent half-wave plates.

DOI
10.1088/1742-6596/752/1/012006

Related papers

Ultra-broadband, ultra-narrowband, and ultra-passband composite polarization half-wave plates, ultra-broadband composite polarization -rotators, and quantum-classical analogy

Hayk L. Gevorgyan

Composite pulses, which produce ultra-broadband, ultra-narrowband and ultra-passband x-, y-rotations R x (θ)=exp⁡{−iθσ x /2}, R y (θ)=exp⁡{−iθσ y /2} by the rotational angle θ = π on the Bloch-Poincaré sphere, are presented. In polarization optics, the first class plays a role in the design of achromatic polarization retarders, while the second class corresponds to chromatic polarization filters. The third class is an assortment of the above two classes. Besides, composite pulses, which produce ultra-broadband z-rotations R z (ζ)=exp⁡−iζσ z /2 by the phasal angle ζ = π on the same sphere, are presented. These phasal pulses coincide with achromatic polarization π rotators. The evolution matrix and the Jones matrix have similar forms in quantum optics and polarization optics. In the context of quantum optics, quantum computing, and quantum information processing, following the quantum-classical analogy, we achieve ultra-robust, ultrasensitive, and ultrasquare quantum control of an X (NOT) gate, and ultra-robust control of a Z phase gate, with respect to pulse area error. Our proposed UBBN (BatN), UNBN (SnakeN), UPBN (OctopusN), and UBBPhN (BatPhN) sequences are novel due to the novel methods of derivation. They surpass and outperform the superior candidates of the similar subclass of altering variable rotations in literature — BB2, NB2, and PB2, in precision parameters such as broadness, narrowness, FWHM, or execution time. We suggest that, in general, the presented composite pulse sequences are interdisciplinary and can have other possible applications, such as nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI) and spectroscopy, quantum sensing, local addressing, optical switching, cold-atom interferometry, quantum communication, quantum cryptography, quantum image processing, and quantum steganography.

arXiv:2406.11055•Optics Express•Jan 24, 2025•2 citations

Efficient broadband polarization retarder via shortcuts to adiabaticity

Wei Wang, Yue Ban, Xi Chen

The use of two-level atomic systems in quantum optics allows for the design of highly efficient and broadband achromatic retarders through the application of adiabatic passage and composite pulse techniques. In this work, we propose shortcuts to adiabaticity to improve broadband polarization retarders with shorter lengths. We achieve this by inversely engineering the relative refractive indices and further optimizing them with respect to the perturbation of input wavelength. Our results are compared with adiabatic and composite protocols, demonstrating that our method provides the advantage of integrating efficiency and robustness.

Optics Letters•Jul 24, 2023•2 citations

Arbitrary photonic wave plate operations on chip: Realizing Hadamard, Pauli-X and rotation gates for polarisation qubits

René Heilmann, Markus Gräfe, Stefan Nolte +1 more

Chip-based photonic quantum computing is an emerging technology that promises much speedup over conventional computers at small integration volumes. Particular interest is thereby given to polarisation-encoded photonic qubits, and many protocols have been developed for this encoding. However, arbitrary wave plate operation on chip are not available so far, preventing from the implementation of integrated universal quantum computing algorithms. In our work we close this gap and present Hadamard, Pauli-X, and rotation gates of high fidelity for photonic polarisation qubits on chip by employing a reorientation of the optical axis of birefringent waveguides. The optical axis of the birefringent waveguide is rotated due to the impact of an artificial stress field created by an additional modification close to the waveguide. By adjusting this length of the defect along the waveguide, the retardation between ordinary and extraordinary field components is precisely tunable including half-wave plate and quarter-wave plate operations. Our approach demonstrates the full range control of orientation and strength of the induced birefringence and thus allows arbitrary wave plate operations without affecting the degree of polarisation or introducing additional losses to the waveguides. The implemented gates are tested with classical and quantum light.

Scientific Reports•Feb 18, 2014•99 citations

Theory of fast quantum control of exciton dynamics in semiconductor quantum dots

Carlo Piermarocchi, Pochung Chen, Yseulte Dale +1 more

Optical techniques for the quantum control of the dynamics of multiexciton states in a semiconductor quantum dot are explored in theory. Composite bichromatic phase-locked pulses are shown to reduce the time of elementary quantum operations on excitons and biexcitons by an order of magnitude or more. Analytic and numerical methods of designing the pulse sequences are investigated. Fidelity of the operation is used to gauge its quality. A modified quantum Fourier transform algorithm is constructed with only Rabi rotations and is shown to reduce the number of operations. Application of the designed pulses to the algorithm is tested by a numerical simulation.

arXiv:cond-mat/0109252•Physical review. B, Condensed matter•Jan 18, 2002•55 citations

Second order phase dispersion by optimized rotation pulses

David L. Goodwin, Martin R. M. Koos, Burkhard Luy

This work presents a new class of pulse to perform a broadband universal rotation on two-level systems, independent of the system preparation, using a phase dispersion function. The authors present a method of optimal control to avoid traps on the control manifold, and find pulses of half the duration compared to the previous best universal rotation pulses.

arXiv:1904.09452•Physical Review Research•Jul 28, 2020•12 citations

Second order phase dispersion by optimized rotation pulses

David L. Goodwin, Martin R. M. Koos, Burkhard Luy

This work presents a new class of pulse to perform a broadband universal rotation on two-level systems, independent of the system preparation, using a phase dispersion function. The authors present a method of optimal control to avoid traps on the control manifold, and find pulses of half the duration compared to the previous best universal rotation pulses.

•Jan 1, 2020•6 citations
Broadband and ultra-broadband half-wave plates with composite design were previously experimentally demonstrated by E. Dimova et. al. , in Opt. Commun. 366 , 382 (2016). To achieve broadband and ultra-broadband performance, the authors utilized the relative rotation between the individual identical half-wave plates as control parameters, thus simulating the well-known control technique of composite pulses from quantum optics. In this paper, we extend the broadband and ultra-broadband designs by relaxing the condition of having identical constituent half-wave plates and allow for their thicknesses to also be variable control parameters. We further relax the condition of having symmetric rotation angles and solve numerically for both control parameters - rotation angles and thicknesses of the birefringent plates. We show that the presented design is broadband over a much wider range of the wavelengths, compared to the original design, when using the same number of constituent half-wave plates.
Composite pulses, which produce ultra-broadband, ultra-narrowband and ultra-passband x-, y-rotations R x (θ)=exp⁡{−iθσ x /2}, R y (θ)=exp⁡{−iθσ y /2} by the rotational angle θ = π on the Bloch-Poincaré sphere, are presented. In polarization optics, the first class plays a role in the design of achromatic polarization retarders, while the second class corresponds to chromatic polarization filters. The third class is an assortment of the above two classes. Besides, composite pulses, which produce ultra-broadband z-rotations R z (ζ)=exp⁡−iζσ z /2 by the phasal angle ζ = π on the same sphere, are presented. These phasal pulses coincide with achromatic polarization π rotators. The evolution matrix and the Jones matrix have similar forms in quantum optics and polarization optics. In the context of quantum optics, quantum computing, and quantum information processing, following the quantum-classical analogy, we achieve ultra-robust, ultrasensitive, and ultrasquare quantum control of an X (NOT) gate, and ultra-robust control of a Z phase gate, with respect to pulse area error. Our proposed UBBN (BatN), UNBN (SnakeN), UPBN (OctopusN), and UBBPhN (BatPhN) sequences are novel due to the novel methods of derivation. They surpass and outperform the superior candidates of the similar subclass of altering variable rotations in literature — BB2, NB2, and PB2, in precision parameters such as broadness, narrowness, FWHM, or execution time. We suggest that, in general, the presented composite pulse sequences are interdisciplinary and can have other possible applications, such as nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI) and spectroscopy, quantum sensing, local addressing, optical switching, cold-atom interferometry, quantum communication, quantum cryptography, quantum image processing, and quantum steganography.
The use of two-level atomic systems in quantum optics allows for the design of highly efficient and broadband achromatic retarders through the application of adiabatic passage and composite pulse techniques. In this work, we propose shortcuts to adiabaticity to improve broadband polarization retarders with shorter lengths. We achieve this by inversely engineering the relative refractive indices and further optimizing them with respect to the perturbation of input wavelength. Our results are compared with adiabatic and composite protocols, demonstrating that our method provides the advantage of integrating efficiency and robustness.
Chip-based photonic quantum computing is an emerging technology that promises much speedup over conventional computers at small integration volumes. Particular interest is thereby given to polarisation-encoded photonic qubits, and many protocols have been developed for this encoding. However, arbitrary wave plate operation on chip are not available so far, preventing from the implementation of integrated universal quantum computing algorithms. In our work we close this gap and present Hadamard, Pauli-X, and rotation gates of high fidelity for photonic polarisation qubits on chip by employing a reorientation of the optical axis of birefringent waveguides. The optical axis of the birefringent waveguide is rotated due to the impact of an artificial stress field created by an additional modification close to the waveguide. By adjusting this length of the defect along the waveguide, the retardation between ordinary and extraordinary field components is precisely tunable including half-wave plate and quarter-wave plate operations. Our approach demonstrates the full range control of orientation and strength of the induced birefringence and thus allows arbitrary wave plate operations without affecting the degree of polarisation or introducing additional losses to the waveguides. The implemented gates are tested with classical and quantum light.
Optical techniques for the quantum control of the dynamics of multiexciton states in a semiconductor quantum dot are explored in theory. Composite bichromatic phase-locked pulses are shown to reduce the time of elementary quantum operations on excitons and biexcitons by an order of magnitude or more. Analytic and numerical methods of designing the pulse sequences are investigated. Fidelity of the operation is used to gauge its quality. A modified quantum Fourier transform algorithm is constructed with only Rabi rotations and is shown to reduce the number of operations. Application of the designed pulses to the algorithm is tested by a numerical simulation.