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

Conference on Lasers and Electro-Optics

Encoding Qubit-Qudit States in Photon Polarization and Picosecond Time-Bins

Y. Pilnyak, Y. Schechter, D. Pleban, Leonid Vidro, Pini Zilber, Lior Cohen, D. Istrati, H. S. Eisenberg

Published Jan 1, 2021• 0 citations
Publisher

Abstract

We introduce a qubit-qutrit information system realized by two degrees of freedom in a single photon: polarization and picosecond time-bin. We demonstrate creation and reconstruction of states in this framework using quantum state tomography.
DOI
10.1364/cleo_qels.2021.ftu4g.2

Related papers

Encoding Qubit-Qudit States in Photon Polarization and Picosecond Time-Bins

Y. Pilnyak, Y. Schechter, D. Pleban +5 more

We introduce a qubit-qutrit information system realized by two degrees of freedom in a single photon: polarization and picosecond time-bin. We demonstrate creation and reconstruction of states in this framework using quantum state tomography.

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

Encoding qubit-qudit states in photon polarization and picosecond time-bins

Y. Pilnyak, Y. Schechter, D. Pleban +5 more

We introduce a qubit-qutrit information system realized by two degrees of freedom in a single photon: polarization and picosecond time-bin. We demonstrate creation and reconstruction of states in this framework using quantum state tomography.

The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting•Jan 1, 2019•0 citations

Quantum Tomography of Photon States Encoded in Polarization and Time

Y. Pilnyak, Pini Zilber, Lior Cohen +1 more

We introduce a two-qubit information system, realized by two degrees of freedom in a single photon: polarization and picosecond time-bin. We demonstrate the reconstruction of two-qubit information encoded in a photon using quantum state tomography.

Quantum Information and Measurement (QIM)•Jan 1, 2017•1 citation

Quantum tomography of photon states encoded in polarization and picosecond time bins

Y. Pilnyak, Pini Zilber, Lior Cohen +1 more

A single photon has many physical degrees of freedom (DOF) that can carry the state of a high-dimensional quantum system. Nevertheless, only a single DOF is usually used in any specific demonstration. Furthermore, when more DOF are being used, they are analyzed and measured one at a time. We introduce a two-qubit information system, realized by two degrees of freedom of a single photon: polarization and time. The photon arrival time is divided into two time bins representing a qubit, while its polarization state represents a second qubit. The time difference between the two time bins is created without an interferometer at the picosecond scale, which is much smaller than the detector's response time. The two physically different DOF are analyzed simultaneously by photon bunching between the analyzed photon and an ancilla photon. Full two-qubit states encoded in single photons were reconstructed using quantum state tomography, both when the two DOF were entangled and when they were not, with fidelities higher than 96%.

arXiv:1903.01106•Physical Review A•Oct 18, 2019•16 citations

Experimental Reconstruction of Time-Bin-Entangled Qutrit States using Polarization Projective Measurements

Samantha J. Nowierski, Neal N. Oza, Prem Kumar +1 more

We generate and reconstruct two-photon, 100-ps-separated time-bin-entangled qutrit states. By pairwise mapping time bins onto orthogonal polarizations, we perform a tomography and demonstrate high fidelity to maximally entangled qutrit states

•Jan 1, 2015•4 citations

Quantum applications of ultrafast time-bin encoding

Frédéric Bouchard

The temporal degree of freedom of single photons is a promising avenue for many quantum information tasks. Here, we experimentally investigate the feasibility of time-bin states of light at the picosecond timescale, known as ultrafast time-bin encoding, for applications in quantum communications, quantum simulations, and quantum information processing. With the ability to generate, manipulate, and measure ultrafast time-bin states of light at the single photon level, we enable the use of temporal states of light in a wide range of quantum applications.

Quantum Communications and Quantum Imaging•Sep 18, 2025•0 citations
A single photon has many physical degrees of freedom (DOF) that can carry the state of a high-dimensional quantum system. Nevertheless, only a single DOF is usually used in any specific demonstration. Furthermore, when more DOF are being used, they are analyzed and measured one at a time. We introduce a two-qubit information system, realized by two degrees of freedom of a single photon: polarization and time. The photon arrival time is divided into two time bins representing a qubit, while its polarization state represents a second qubit. The time difference between the two time bins is created without an interferometer at the picosecond scale, which is much smaller than the detector's response time. The two physically different DOF are analyzed simultaneously by photon bunching between the analyzed photon and an ancilla photon. Full two-qubit states encoded in single photons were reconstructed using quantum state tomography, both when the two DOF were entangled and when they were not, with fidelities higher than 96%.
The temporal degree of freedom of single photons is a promising avenue for many quantum information tasks. Here, we experimentally investigate the feasibility of time-bin states of light at the picosecond timescale, known as ultrafast time-bin encoding, for applications in quantum communications, quantum simulations, and quantum information processing. With the ability to generate, manipulate, and measure ultrafast time-bin states of light at the single photon level, we enable the use of temporal states of light in a wide range of quantum applications.