Time-bin entangled Bell state generation and tomography on thin-film lithium niobate
- URL: http://arxiv.org/abs/2407.04048v1
- Date: Thu, 4 Jul 2024 16:43:36 GMT
- Title: Time-bin entangled Bell state generation and tomography on thin-film lithium niobate
- Authors: Giovanni Finco, Filippo Miserocchi, Andreas Maeder, Jost Kellner, Alessandra Sabatti, Robert J. Chapman, Rachel Grange,
- Abstract summary: Lithium niobate-on-insulator has emerged as a revolutionising platform for high-speed classical telecommunication.
We generate maximally entangled quantum states in the time-bin basis using lithium niobate-on-insulator photonics.
Our results, combined with the established large electro-optic bandwidth of lithium niobate, showcase the platform as perfect candidate to realise fibre-coupled, high-speed time-bin quantum communication modules.
- Score: 36.6385169124258
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Optical quantum communication technologies are making the prospect of unconditionally secure and efficient information transfer a reality. The possibility of generating and reliably detecting quantum states of light, with the further need of increasing the private data-rate is where most research efforts are focusing. The physical concept of entanglement is a solution guaranteeing the highest degree of security in device-independent schemes, yet its implementation and preservation over long communication links is hard to achieve. Lithium niobate-on-insulator has emerged as a revolutionising platform for high-speed classical telecommunication and is equally suited for quantum information applications owing to the large second-order nonlinearities that can efficiently produce entangled photon pairs. In this work, we generate maximally entangled quantum states in the time-bin basis using lithium niobate-on-insulator photonics at the fibre optics telecommunication wavelength, and reconstruct the density matrix by quantum tomography on a single photonic integrated circuit. We use on-chip periodically-poled lithium niobate as source of entangled qubits with a brightness of 242 MHz/mW and perform quantum tomography with a fidelity of 91.9+-1.0 %. Our results, combined with the established large electro-optic bandwidth of lithium niobate, showcase the platform as perfect candidate to realise fibre-coupled, high-speed time-bin quantum communication modules that exploit entanglement to achieve information security.
Related papers
- Faithful quantum teleportation via a nanophotonic nonlinear Bell state analyzer [3.9379777965064524]
We show a nonlinear Bell state analyzer for time-bin encoded photons based on a nanophotonic cavity with efficient sum-frequency generation.
Our result demonstrates that nonlinear-optical entangling operations, empowered by our efficient nanophotonics platform, can realize faithful quantum information protocols.
arXiv Detail & Related papers (2024-11-23T03:44:06Z) - A robust approach for time-bin encoded photonic quantum information protocols [0.0]
Quantum states encoded in the time-bin degree of freedom of photons represent a fundamental resource for quantum information protocols.
Traditional methods for generating and measuring time-bin encoded quantum states face severe challenges due to optical instabilities, complex setups, and timing resolution requirements.
We propose a robust and scalable protocol to generate and measure high-dimensional time-bin quantum states in a single spatial mode.
arXiv Detail & Related papers (2024-04-24T18:00:54Z) - High-dimensional quantum correlation measurements with an adaptively
gated hybrid single-photon camera [58.720142291102135]
We propose an adaptively-gated hybrid intensified camera (HIC) that combines a high spatial resolution sensor and a high temporal resolution detector.
With a spatial resolution of nearly 9 megapixels and nanosecond temporal resolution, this system allows for the realization of previously infeasible quantum optics experiments.
arXiv Detail & Related papers (2023-05-25T16:59:27Z) - High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band [28.279056210896716]
Single indistinguishable photons at telecom C-band wavelengths are essential for quantum networks and the future quantum internet.
We demonstrate the high- throughput fabrication of quantum-photonic integrated devices operating at C-band wavelengths based on epitaxial semiconductor quantum dots.
Further improvements in yield and coherence properties will pave the way for implementing single-photon non-linear devices and advanced quantum networks at telecom wavelengths.
arXiv Detail & Related papers (2023-04-05T15:39:22Z) - QUICK$^3$ -- Design of a satellite-based quantum light source for
quantum communication and extended physical theory tests in space [73.86330563258117]
Single photon source can enhance secure data rates in satellite-based quantum key distribution scenarios.
payload is being integrated into a 3U CubeSat and scheduled for launch in 2024 into low Earth orbit.
arXiv Detail & Related papers (2023-01-26T15:34:11Z) - Quantum Key Distribution using Deterministic Single-Photon Sources over
a Field-Installed Fibre Link [2.1033685912119466]
We realize a quantum key distribution field trial using true single photons across an 18-km-long dark fibre, located in the Copenhagen metropolitan area.
A secret key generation rate of >2 kbits/s realized over a 9.6 dB channel loss is achieved with a polarization-encoded BB84 scheme.
arXiv Detail & Related papers (2023-01-23T12:43:23Z) - Storage and analysis of light-matter entanglement in a fibre-integrated
system [48.7576911714538]
We demonstrate a fiber-integrated quantum memory entangled with a photon at telecommunication wavelength.
The storage device is based on a fiber-pigtailed laser written waveguide in a rare-earth doped solid and allows an all-fiber stable adressing of the memory.
Our results feature orders of magnitude advances in terms of storage time and efficiency for integrated storage of light-matter entanglement, and constitute a significant step forward towards quantum networks using integrated devices.
arXiv Detail & Related papers (2022-01-10T14:28:04Z) - Rapid characterisation of linear-optical networks via PhaseLift [51.03305009278831]
Integrated photonics offers great phase-stability and can rely on the large scale manufacturability provided by the semiconductor industry.
New devices, based on such optical circuits, hold the promise of faster and energy-efficient computations in machine learning applications.
We present a novel technique to reconstruct the transfer matrix of linear optical networks.
arXiv Detail & Related papers (2020-10-01T16:04:22Z) - Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
Integrated photonics is a robust platform for quantum information processing.
Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive.
Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
arXiv Detail & Related papers (2020-05-19T16:46:44Z) - Integrated micro-comb sources for quantum optical applications [0.0]
We review progress on the realization of energy-time entangled optical frequency combs.
We discuss how photonic integration and the use of fiber-optic telecommunications components can enable quantum state control.
arXiv Detail & Related papers (2020-01-08T03:39:07Z)
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.