Quantum 2.0 Conference and Exhibition

Fully Programmable Quantum Interference of Squeezed States via Frequency Conversion

Patrick Folge, Abhinandan Bhattacharjee, Michael Stefszky, Sebastian Lengeling, Raimund Ricken, Benjamin Brecht, Christine Silberhorn

Published Jan 1, 2024• 0 citations

Publisher

Abstract

We experimentally demonstrate fully programmable interference of multiple squeezed states in a frequency bin network by utilizing a engineered frequency conversion process. This offers a scalable approach towards large multi-port quantum state interferometers.

DOI: 10.1364/quantum.2024.qw2b.3

Related papers

Multimode Squeezed States in Frequency Conversion Based Time-Frequency Networks

Patrick Folge, Matteo Santandrea, Michael Stefszky +2 more

We theoretically investigate the resource efficient implementation of linear optical quantum networks based on frequency bins, multimode squeezed states and mode-selective frequency conversion as well as their optimization.

Frontiers in OpticsJan 1, 20220 citations

A Framework for Fully Programmable Frequency-Encoded Quantum Networks Harnessing Multioutput Quantum Pulse Gates

Patrick Folge, Michael Stefszky, Benjamin Brecht +1 more

Linear optical quantum networks, consisting of a quantum input state and a multiport interferometer, are an important building block for many quantum technological concepts, e.g., Gaussian boson sampling. Here, we propose the implementation of such networks based on frequency conversion by utilizing a so-called multioutput quantum pulse gate (MQPG). This approach allows the resource-efficient and therefore scalable implementation of frequency-bin-based, fully programmable interferometers in a single spatial and polarization mode. Quantum input states for this network can be provided by utilizing the strong frequency entanglement of a type-0 parametric down-conversion (PDC) source. Here, we develop a theoretical framework to describe linear networks based on an MQPG and PDC and utilize it to investigate the limits and scalabilty of our approach. Published by the American Physical Society 2024

arXiv:2402.06786PRX QuantumNov 26, 20249 citations

Tunable frequency-bin multi-mode squeezed states of light

Christian Drago, Agata M. Brańczyk

Squeezed states are a versatile class of quantum states with applications ranging from quantum computing to high-precision detection. We propose a method for generating tunable squeezed states of light with multiple modes encoded in frequency bins. Our method uses custom-engineered spontaneous parametric downconversion pumped by a pulse-shaped pump field. The multi-mode squeezed states are generated in a single pass and can be tuned in real time by adjusting the properties of the pump field. Exploring new quantum states of light, encoded in new degrees of freedom, can be a fruitful path toward discovering new quantum applications.

arXiv:2204.10079Apr 21, 20221 citation

Tunable frequency-bin multimode squeezed vacuum states of light

Christian Drago, Agata M. Brańczyk

Squeezed states are a versatile class of quantum states with applications ranging from quantum computing to high-precision detection. We propose a method for generating tunable squeezed vacuum states of light with multiple modes encoded in frequency bins. Our method uses custom-engineered spontaneous parametric down-conversion pumped by a pulse-shaped pump field. The multimode squeezed states are generated in a single pass and can be tuned in real time by adjusting the properties of the pump field. Exploring new quantum states of light, encoded in new degrees of freedom, can be a fruitful path toward discovering new quantum applications.

Physical Review AOct 20, 20226 citations

Programmable Multimode Quantum Correlations Across Multiple Frequency Combs

Debasmita Banerjee, Sahil Pontula, Thu Thanh Minh Do +2 more

We engineer multimode quantum correlations in a nonlinear cavity using Bayesian optimization to identify mode dissipation and pump profiles, enabling programmable correlation-matrix and the generation of multimode squeezed states across frequency combs.

Jan 1, 20260 citations

Programmable multimode squeezed light at visible wavelengths with >400 modes

Federico Presutti, Logan G. Wright, Shi-Yuan Ma +4 more

We demonstrate a source of highly multimode, high gain vacuum squeezed light, and demonstrate how ultra-broadband frequency conversion enables the use of visible-light detector arrays and programmable frequency-domain unitary transformations.

Jan 1, 20240 citations