Compact linear optical scheme for Bell state generation
- URL: http://arxiv.org/abs/2105.06306v2
- Date: Sat, 12 Jun 2021 15:50:42 GMT
- Title: Compact linear optical scheme for Bell state generation
- Authors: Suren A. Fldzhyan, Mikhail Yu. Saygin and Sergei P. Kulik
- Abstract summary: We report the most compact scheme producing the dual-rail-encoded Bell states out of four single photons.
Our scheme requires a five-mode interferometer and a single photon detector, while the previously known schemes use six-mode interferometers and two photon detectors.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The capability of linear optics to generate entangled states is exploited in
photonic quantum information processing, however, it is challenging to obtain
entangled logical qubit states. We report, to the best of our knowledge, the
most compact scheme producing the dual-rail-encoded Bell states out of four
single photons. Our scheme requires a five-mode interferometer and a single
photon detector, while the previously known schemes use six-mode
interferometers and two photon detectors. Using computer optimization, we have
found a decomposition of the five-mode interferometer with a minimum number of
beam-splitters and phase-shift elements. Besides compactness, our scheme also
offers a success probability of $1/9$, which is higher than $2/27$ provided by
the six-mode counterparts. The analysis suggests that the elevated success
probability is connected to higher order of photon interference realized by our
scheme, in particular, four-photon interference is implemented in our scheme,
while three-photon interference was implemented in previous counterparts.
Related papers
- Multiphoton interference in a single-spatial-mode quantum walk [0.0]
Multiphoton interference is crucial to many photonic quantum technologies.
Here, we implement a quantum walk in a highly stable, low-loss, multiport interferometer with up to 24 ultrafast time bins.
Our results demonstrate that ultrafast time bins are a promising platform to observe large-scale multiphoton interference.
arXiv Detail & Related papers (2024-09-17T18:14:54Z) - Single-photon description of the lossless optical Y coupler [41.94295877935867]
We derive a unitary scattering matrix for a three-port optical Y-coupler or Y-branch.
Unlike traditional passive linear-optical one-way splitters, coupling light into the conventional output ports of the Y-coupler results in strong coherent back-reflections.
arXiv Detail & Related papers (2024-08-27T15:55:43Z) - Passive photonic CZ gate with two-level emitters in chiral multi-mode waveguide QED [41.94295877935867]
We design a passive conditional gate between co-propagating photons using an array of only two-level emitters.
The key resource is to harness the effective photon-photon interaction induced by the chiral coupling of the emitter array to two waveguide modes.
We show how to harness this non-linear phase shift to engineer a conditional, deterministic photonic gate in different qubit encodings.
arXiv Detail & Related papers (2024-07-08T18:00:25Z) - Strong coupling between a single photon and a photon pair [43.14346227009377]
We report an experimental observation of the strong coupling between a single photon and a photon pair in an ultrastrongly-coupled circuit-QED system.
Results represent a key step towards a new regime of quantum nonlinear optics.
arXiv Detail & Related papers (2024-01-05T10:23:14Z) - Programmable heralded linear optical generation of two-qubit states [0.0]
We have investigated the heralded generation of two-qubit dual-rail-encoded states by programmable linear optics.
Two types of schemes generating the states from four single photons, which is the minimal possible to accomplish the task, have been considered.
We infer that the linear optical schemes designed specifically for generation of two-qubit states are more efficient than schemes implementing gate-based circuits.
arXiv Detail & Related papers (2022-04-19T10:16:08Z) - Ultra-long photonic quantum walks via spin-orbit metasurfaces [52.77024349608834]
We report ultra-long photonic quantum walks across several hundred optical modes, obtained by propagating a light beam through very few closely-stacked liquid-crystal metasurfaces.
With this setup we engineer quantum walks up to 320 discrete steps, far beyond state-of-the-art experiments.
arXiv Detail & Related papers (2022-03-28T19:37:08Z) - Creation of Entangled Photonic States Using Linear Optics [0.09287179270753103]
We introduce techniques and methods to generate photonic entangled states with high probability.
We show how to improve Bell state preparation from four single photons to up to p=2/3, boost Type-I fusion to 75% with a dual-rail Bell state ancilla and improve Type-II fusion beyond the limits of Bell state discrimination.
arXiv Detail & Related papers (2021-06-25T18:02:42Z) - Precise and extensive characterization of an optical resonator for
cavity-based quantum networks [1.3209941988151326]
Cavity-based quantum node is a competitive platform for distributed quantum networks.
We characterize a high-finesse Fabry-Perot optical resonator for coupling single or few atomic quantum registers.
arXiv Detail & Related papers (2021-02-11T05:39:53Z) - Spatial entanglement and state engineering via four-photon
Hong-Ou-Mandel interference [0.0]
Entangled systems with a large number of photons provide a platform for streaming technologies based on photonics.
We present a device which operates with four-photons and based on the Hong-Ou-Mandel (HOM) interference.
The presented device allows to maximize the degree of spatial entanglement and generate the highly entangled four-dimensional Bell states.
arXiv Detail & Related papers (2020-07-20T12:51:01Z) - 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) - Frequency-Domain Quantum Interference with Correlated Photons from an
Integrated Microresonator [96.25398432840109]
We report frequency-domain Hong-Ou-Mandel interference with spectrally distinct photons generated from a chip-based microresonator.
Our work establishes four-wave mixing as a tool for selective high-fidelity two-photon operations in the frequency domain.
arXiv Detail & Related papers (2020-03-14T01:48:39Z)
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.