Engineering multipartite entangled states in doubly pumped parametric
down-conversion processes
- URL: http://arxiv.org/abs/2007.12014v3
- Date: Thu, 19 Nov 2020 12:08:45 GMT
- Title: Engineering multipartite entangled states in doubly pumped parametric
down-conversion processes
- Authors: Alessandra Gatti, Enrico Brambilla, Ottavia Jedrkiewicz
- Abstract summary: We investigate the quantum state generated by optical parametric down-conversion in a $chi(2) $ medium driven by two modes.
The analysis shows the emergence of multipartite, namely 3- or 4-partite, entangled states in a subset of the modes generated by the process.
- Score: 68.8204255655161
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We investigate the quantum state generated by optical parametric
down-conversion in a $\chi^{(2) } $ medium driven by two noncollinear light
modes. The analysis shows the emergence of multipartite, namely 3- or
4-partite, entangled states in a subset of the spatio-temporal modes generated
by the process. These appear as bright spots against the background
fluorescence, providing an interesting analogy with the phenomenology recently
observed in two-dimensional nonlinear photonic crystals. We study two realistic
setups: i) Non-critical phase-matching in a periodically poled Lithium
Tantalate slab, characterized by a 3-mode entangled state among hot spots. ii)
A type I setup in a Beta-Barium Borate crystal, where the spatial walk-off
between the two pumps can be exploited to make a transition to a quadripartite
entangled state. In both cases we show that the properties of the state can be
controlled by modulating the relative intensity of two pump waves, making the
device a versatile tool for quantum state engineering.
Related papers
- Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide.
When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits.
We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
arXiv Detail & Related papers (2024-08-30T15:54:33Z) - Nonreciprocal Superradiant Phase Transitions and Multicriticality in a Cavity QED System [4.647630244371672]
We show nonreciprocal superradiant phase transitions and novel multicriticality in a cavity quantum electrodynamics system.
Results open a new door for all-optical manipulation of superradiant transitions and multicritical behaviors in light-matter systems.
arXiv Detail & Related papers (2024-05-22T13:15:07Z) - Spatial-spectral mapping to prepare the frequency entangled qudits [4.5526899359065744]
Entangled qudits play an important role in the study of quantum information.
How to prepare entangled qudits in an efficient and easy-to-operate manner is still a challenge in quantum technology.
arXiv Detail & Related papers (2023-07-17T15:54:05Z) - Experimental Realization and Characterization of Stabilized Pair
Coherent States [4.486044407450978]
PCS is an interesting class of non-Gaussian continuous-variable entangled state.
PCS is at the heart of a promising quantum error correction code: the pair cat code.
We report an experimental demonstration of the pair coherent state of microwave photons in two superconducting cavities.
arXiv Detail & Related papers (2022-09-23T15:24:25Z) - Multipartite spatial entanglement generated by concurrent nonlinear
processes [91.3755431537592]
Continuous variables multipartite entanglement is a key resource for quantum technologies.
This work considers the multipartite entanglement generated in separated spatial modes of the same light beam by three different parametric sources.
arXiv Detail & Related papers (2021-11-09T17:15:13Z) - Time crystal and chaos in the hybrid atom-optomechanics system [1.0323063834827415]
We consider atoms in two different periodic potentials induced by different lasers, one of which is coupled to a mechanical membrane via radiation pressure force.
The atoms are intrinsically two-level systems that can absorb or emit photons, but the dynamics of their position and momentum are treated classically.
On the other hand, the membrane, the cavity field, and the intrinsic two-level atoms are treated quantum mechanically.
arXiv Detail & Related papers (2021-09-20T03:06:50Z) - Superposition of two-mode squeezed states for quantum information
processing and quantum sensing [55.41644538483948]
We investigate superpositions of two-mode squeezed states (TMSSs)
TMSSs have potential applications to quantum information processing and quantum sensing.
arXiv Detail & Related papers (2021-02-01T18:09:01Z) - Hot-spots and gain enhancement in a doubly pumped parametric
down-conversion process [62.997667081978825]
We experimentally investigate the parametric down-conversion process in a nonlinear bulk crystal, driven by two non-collinear pump modes.
The experiment shows the emergence of bright hot-spots in modes shared by the two pumps, in analogy with the phenomenology recently observed in 2D nonlinear photonic crystals.
arXiv Detail & Related papers (2020-07-24T09:39:03Z) - 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.