Deterministic preparation of optical qubits with coherent feedback control

• URL: http://arxiv.org/abs/2109.08641v1
• Date: Fri, 17 Sep 2021 16:47:29 GMT
• Title: Deterministic preparation of optical qubits with coherent feedback control
• Authors: Amy Rouillard, Tanita Permaul, Sandeep K. Goyal and Thomas Konrad
• Abstract summary: We propose a class of preparation schemes for orbital angular momentum and polarisation qubits carried by single photons or classical states of light. The preparation methods use linear optics and include the transcription of an arbitrary polarisation state onto a two-level OAM system. We show how to translate measurement-based qubit control channels into coherent feedback schemes for optical implementation.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose a class of preparation schemes for orbital angular momentum and polarisation qubits carried by single photons or classical states of light based on coherent feedback control by an ancillary degree of freedom of light. The preparation methods use linear optics and include the transcription of an arbitrary polarisation state onto a two-level OAM system (swap) for arbitrary OAM values plus/minus "l" within a light beam, i.e. without spatial interferometer. The preparations can be carried out with unit efficiency independent from the potentially unknown initial state of the system. Moreover, we show how to translate measurement-based qubit control channels into coherent feedback schemes for optical implementation.

Related papers

• Generating arbitrary non-separable states with polarization and orbital angular momentum of light [4.9797021649273985]
  We generate arbitrary non-separable states of light using polarization and orbital angular momentum (OAM) degrees of freedom. We observe the intensity distribution corresponding to OAM modes of the light beam by projecting the non-separable state into different polarization states. This classical non-separability can be easily transferred to the quantum domain.
  arXiv  Detail & Related papers  (2023-07-12T09:45:36Z)
• Shaping Single Photons through Multimode Optical Fibers using Mechanical Perturbations [55.41644538483948]
  We show an all-fiber approach for controlling the shape of single photons and the spatial correlations between entangled photon pairs. We optimize these perturbations to localize the spatial distribution of a single photon or the spatial correlations of photon pairs in a single spot.
  arXiv  Detail & Related papers  (2023-06-04T07:33:39Z)
• A monolithic interferometer for high-sensitive strictly-local detection of orbital angular momentum states of light [0.0]
  We propose an innovative monolithic interferometer to distinguish the topological charge of radiation carrying orbital angular momentum. The proposed scheme relies on a monolithic birefringent crystal, and as such it is intrinsically stable and does not require any feedback or thermal drift compensation.
  arXiv  Detail & Related papers  (2023-01-18T13:08:09Z)
• Non-local polarization alignment and control in fiber using feedback from correlated measurements of entangled photons [0.7174734306558701]
  Quantum measurements that use the entangled photons' polarization to encode quantum information require calibration and alignment of the measurement bases. We report here a fast method for automatic alignment and dynamic tracking of the polarization measurement bases between spatially separated detectors.
  arXiv  Detail & Related papers  (2022-09-14T20:37:00Z)
• Regression of high dimensional angular momentum states of light [47.187609203210705]
  We present an approach to reconstruct input OAM states from measurements of the spatial intensity distributions they produce. We showcase our approach in a real photonic setup, generating up-to-four-dimensional OAM states through a quantum walk dynamics.
  arXiv  Detail & Related papers  (2022-06-20T16:16:48Z)
• Quantum state tomography of qudits via Hong-Ou-Mandel interference [0.13124513975412253]
  We propose a method to perform the quantum state tomography (QST) of an $mathitn$-partite qudit state embedded in single photons.
  arXiv  Detail & Related papers  (2022-05-23T09:51:27Z)
• Tunable directional photon scattering from a pair of superconducting qubits [105.54048699217668]
  In the optical and microwave frequency ranges tunable directionality can be achieved by applying external magnetic fields. We demonstrate tunable directional scattering with just two transmon qubits coupled to a transmission line.
  arXiv  Detail & Related papers  (2022-05-06T15:21:44Z)
• Cooling and state preparation in an optical lattice via Markovian feedback control [0.0]
  We propose and investigate a scheme based on Markovian feedback control that allows for the preparation of single targeted eigenstates of a system of bosonic atoms in a one-dimensional optical lattice with high fidelity. It can be used for in-situ cooling the interacting system without particle loss, both for weak and strong interactions, and for experimentally preparing and probing individual excited eigenstates.
  arXiv  Detail & Related papers  (2021-06-07T18:05:00Z)
• Two-photon resonance fluorescence of two interacting non-identical quantum emitters [77.34726150561087]
  We study a system of two interacting, non-indentical quantum emitters driven by a coherent field. We show that the features imprinted by the two-photon dynamics into the spectrum of resonance fluorescence are particularly sensitive to changes in the distance between emitters. This can be exploited for applications such as superresolution imaging of point-like sources.
  arXiv  Detail & Related papers  (2021-06-04T16:13:01Z)
• Coherent control in the ground and optically excited state of an ensemble of erbium dopants [55.41644538483948]
  Ensembles of erbium dopants can realize quantum memories and frequency converters. In this work, we use a split-ring microwave resonator to demonstrate such control in both the ground and optically excited state.
  arXiv  Detail & Related papers  (2021-05-18T13:03:38Z)
• Hyperentanglement in structured quantum light [50.591267188664666]
  Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols. Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes. We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
  arXiv  Detail & Related papers  (2020-06-02T18:00:04Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.