Two-photon quantum state tomography of photonic qubits
- URL: http://arxiv.org/abs/2310.17411v2
- Date: Thu, 21 Dec 2023 00:22:33 GMT
- Title: Two-photon quantum state tomography of photonic qubits
- Authors: Guilherme P. Tempor\~ao and Pedro Ripper and Thiago B. Guerreiro and
Gustavo C. do Amaral
- Abstract summary: We provide a tool for measuring the Stokes parameters and the degree of polarization of single photons by employing second order interference.
It is shown that the technique is able to distinguish a partially polarized photon where the polarization state is coupled to an internal degree of freedom.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We provide a tool for measuring the Stokes parameters and the degree of
polarization of single photons by employing second order interference, namely
the Hong-Ou-Mandel (HOM) interferometer. It is shown that the technique is able
to distinguish a partially polarized photon where the polarization state is
coupled to an internal degree of freedom, such as time of arrival, from partial
polarization due to external entanglement with the environment. The method does
not directly resort to any kind of polarization-selective components and
therefore is not limited by the extinction ratio of polarizers. Moreover, the
technique can be generalized to any two-level encoding of quantum information
in single photons, such as time-bin or orbital angular momentum qubits.
Related papers
- Quantum Pair Generation in Nonlinear Metasurfaces with Mixed and Pure Photon Polarizations [0.09423257767158633]
We present a solution by achieving polarization engineering of frequency-nondegenerate biphotons emitted via spontaneous parametric down-conversion.
By performing a comprehensive polarization tomography, we demonstrate that the polarization of the emitted photons directly reflects the qBIC mode's far-field properties.
arXiv Detail & Related papers (2024-09-06T19:17:11Z) - Directional spontaneous emission in photonic crystal slabs [49.1574468325115]
Spontaneous emission is a fundamental out-of-equilibrium process in which an excited quantum emitter relaxes to the ground state due to quantum fluctuations.
One way to modify these photon-mediated interactions is to alter the dipole radiation patterns of the emitter, e.g., by placing photonic crystals near them.
Our study delves into the interaction between these directional emission patterns and the aforementioned variables, revealing the untapped potential to fine-tune collective quantum optical phenomena.
arXiv Detail & Related papers (2023-12-04T15:35:41Z) - Entangling entanglement: coupling frequency and polarization of
biphotons on demand [7.450721110075674]
Quantum information is often carried in the frequency and polarization degrees of freedom (DoFs) in single photons and entangled photons.
We show a new approach to couple and decouple the frequency and polarization DoFs of broadband biphotons.
Our approach offers a convenient means of tuning the polarization entanglement and can be employed for arbitrary biphoton polarization state generation.
arXiv Detail & Related papers (2023-11-23T19:35:50Z) - 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) - 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) - Single quantum emitters with spin ground states based on Cl bound
excitons in ZnSe [55.41644538483948]
We show a new type of single photon emitter with potential electron spin qubit based on Cl impurities inSe.
Results suggest single Cl impurities are suitable as single photon source with potential photonic interface.
arXiv Detail & Related papers (2022-03-11T04:29:21Z) - Wave nature-based nonlocal correlation via projection measurements
between space-like separated interferometric systems [0.0]
A macroscopic version of the delayed-choice experiments has been demonstrated using the classical means of Poisson distributed photons in a noninterfering Mach-Zehnder interferometer (NMZI)
Indistinguishability limited to a single or entangled photon pairs needs to be reconsidered with basis (polarization) randomness for the nonlocal correlation.
arXiv Detail & Related papers (2022-02-23T05:51:23Z) - 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) - Observation-dependent suppression and enhancement of two-photon
coincidences by tailored losses [68.8204255655161]
Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter.
In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement.
Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
arXiv Detail & Related papers (2021-05-12T06:47:35Z) - Polarization-orbital angular momentum duality assisted entanglement
observation for indistinguishable photons [0.6524460254566905]
Duality in the entanglement of identical particles manifests that entanglement in only one variable can be revealed at a time.
We show polarization entanglement by sorting photons in even and odd OAM basis, while sorting them in two polarization modes reveals the OAM entanglement.
arXiv Detail & Related papers (2021-04-23T18:58:33Z) - 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.