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Few-cycle vacuum squeezing in nanophotonics

Nehra, Rajveer and Sekine, Ryoto and Ledezma, Luis and Guo, Qiushi and Gray, Robert M. and Roy, Arkadev and Marandi, Alireza (2022) Few-cycle vacuum squeezing in nanophotonics. . (Unpublished)

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One of the most fundamental quantum states of light is squeezed vacuum, in which noise in one of the quadratures is less than the standard quantum noise limit. Significant progress has been made in the generation of optical squeezed vacuum and its utilization for numerous applications. However, it remains challenging to generate, manipulate, and measure such quantum states in nanophotonics with performances required for a wide range of scalable quantum information systems. Here, we overcome this challenge in lithium niobate nanophotonics by utilizing ultrashort-pulse phase-sensitive amplifiers for both generation and all-optical measurement of squeezed states on the same chip. We generate a squeezed state spanning over more than 25 THz of bandwidth supporting only a few optical cycles, and measure a maximum of 4.9 dB of squeezing (∼11 dB inferred). This level of squeezing surpasses the requirements for a wide range of quantum information systems. Our results on generation and measurement of few-optical-cycle squeezed states in nanophotonics enable a practical path towards scalable quantum information systems with THz clock rates and open opportunities for studying non-classical nature of light in the sub-cycle regime.

Item Type:Report or Paper (Discussion Paper)
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URLURL TypeDescription Paper ItemJournal Article
Nehra, Rajveer0000-0002-0165-2188
Sekine, Ryoto0000-0001-6135-8581
Ledezma, Luis0000-0002-0365-1672
Guo, Qiushi0000-0002-6217-102X
Roy, Arkadev0000-0001-5659-8388
Marandi, Alireza0000-0002-0470-0050
Additional Information:Attribution 4.0 International (CC BY 4.0). The device nanofabrication was performed at the Kavli Nanoscience Institute (KNI) at Caltech. The authors gratefully acknowledge support from ARO grant no. W911NF-18-1-0285, NSF grant no. 1846273 and 1918549, AFOSR award FA9550-20-1-0040, and NASA/JPL. This project was funded in part by the President's and Director's Research and Development Fund of Caltech and JPL. The authors wish to thank NTT Research for their financial and technical support. The authors thank Carlos Gonzàlez-Arciniegas and Olivier Pfister for fruitful discussions. DATA AVAILABILITY. The data supporting the plots within this paper and other  ndings of this study are available from the corresponding author upon reasonable request. CODE AVAILABILITY. The computer codes used to perform the numerical simulations in this paper are available from the corresponding author upon reasonable request. AUTHORS CONTRIBUTIONS. R.N. and A.M. conceived the idea and designed the experiments; R.N. designed the devices with assistance from L.L. and Q.G.; R.S. fabricated the devices and L.L. performed the periodic poling; R.N. carried out the experiments with assistance from R.S., R.M.G., Q.G. and A.R.; R.N. performed the theoretical and numerical analysis with contributions from L.L.; R.N. and A.M. wrote the manuscript with input from all other authors. A.M. supervised the project.
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Army Research Office (ARO)W911NF-18-1-0285
Air Force Office of Scientific Research (AFOSR)FA9550-20-1-0040
JPL President and Director's FundUNSPECIFIED
Record Number:CaltechAUTHORS:20220428-212242880
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114513
Deposited By: George Porter
Deposited On:28 Apr 2022 22:44
Last Modified:06 Jan 2023 00:03

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