Quantum scissors for noiseless linear amplification of polarization frequency hyper-encoded coherent state. (1st October 2022)

• Record Type: Journal Article
• Authors: Zhong, Wei; Li, Yu-Peng; Sheng, Yu-Bo; Zhou, Lan
• Is Part Of: Europhysics letters. Volume 140:Number 1(2022)
• Publication Date: 2022-10-01
• Subjects: Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1209/0295-5075/ac9157
• Languages: English
• ISSNs: 0295-5075

Abstract

Abstract: Quantum scissor (QS) is a powerful tool to realize the optical truncation and noiseless linear amplification (NLA) of the Fock state. The hyper-encoding technology which encodes messages in two or more degrees of freedom of a photon is a promising tool for increasing the channel capacity of photons and has been widely used in quantum computing and quantum communication fields. Here, we propose the one-photon and three-photon QSs for the frequency-encoded and polarization frequency hyper-encoded coherent states, which can realize the one-order and three-order truncation and NLA of the coherent state, and preserve the encoded features of the photons. The quantum scissors for the hyper-encoded coherent state would introduce some unwanted disturb items with small probability. Our QSs can be extended to distill the hyper-encoded multi-spatial-mode entanglement. Our QSs have application potential in the future quantum information processing field.