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Quantum correlated states of light, such as squeezed states, are a fundamental resource for the development of quantum technologies, as they are needed for applications in quantum metrology, quantum computation, and quantum communications.…

Quantum Physics · Physics 2025-08-19 Umang Jain , Jae Choi , Christopher Hull , Alberto M. Marino

Strongly squeezed light finds many important applications within the fields of quantum metrology, quantum communication and quantum computation. However, due to the bulkiness and complexity of most squeezed light sources of today, they are…

Using a nondegenerate four-wave mixing (FWM) process based on a double-{\Lambda} scheme in hot cesium vapor, we demonstrate a compact diode-laser-pumped quantum light source for the generation of quantum correlated twin beams with a maximum…

Quantum Physics · Physics 2018-03-09 Rong Ma , Wei Liu , Zhongzhong Qin , Xiaolong Su , Xiaojun Jia , Junxiang Zhang , Jiangrui Gao

We have built a compact light source for bright squeezed twin-beams at 795\,nm based on four-wave-mixing in atomic $^{85}$Rb vapor. With a total optical power of 400\,mW derived from a free running diode laser and a tapered amplifier to…

Quantum Physics · Physics 2012-09-13 Ulrich Vogl , Ryan T. Glasser , Paul D. Lett

Squeezed light is a quantum resource that can improve the sensitivity of optical measurements. However, existing sources of squeezed light generally require high powers and are not amenable to portability. Here we theoretically investigate…

Quantum Physics · Physics 2020-12-07 Bonnie L. Schmittberger

Squeezed states of light have received renewed attention due to their applicability to quantum-enhanced sensing. To take full advantage of their reduced noise properties to enhance atomic-based sensors, it is necessary to generate…

Quantum Physics · Physics 2022-07-21 Saesun Kim , Alberto M. Marino

We propose a novel squeezed light source capable of meeting the stringent requirements of continuous variable quantum sampling. Using the effective $\chi_2$ interaction induced by a strong driving beam in the presence of the $\chi_3$…

Quantum Physics · Physics 2019-12-18 Z. Vernon , N. Quesada , M. Liscidini , B. Morrison , M. Menotti , K. Tan , J. E. Sipe

We reported a compact squeezed light source consisting of an diode laser near resonant on 87Rb optical D1 transition and an warm Rubidium vapor cell. The -4dB vacuum squeezing at 795 nm via nonlinear magneto-optical rotation was observed…

Quantum Physics · Physics 2015-12-29 Guzhi Bao , Xiaotian Feng , Bing Chen , Jinxian Guo , Heng Shen , Liqing Chen , Weiping Zhang

Continuous variable encoding of quantum information requires the deterministic generation of highly correlated quantum states of light in the form of quantum networks, which, in turn, necessitates the controlled generation of a large number…

Squeezed states of light have found their way into a number of applications in quantum-enhanced metrology due to their reduced noise properties. In order to extend such an enhancement to metrology experiments based on atomic ensembles, an…

Quantum Physics · Physics 2022-07-21 Saesun Kim , Alberto M. Marino

A novel two-mode non-degenerate squeezed light is generated based on a four-wave mixing (4WM) process driven by two pump fields crossing at a small angle. By exchanging the roles of the pump beams and the probe and conjugate beams, we have…

Quantum Physics · Physics 2020-08-21 Xuan-Jian He , Jun Jia , Gao-Feng Jiao , L. Q. Chen , Weiping Zhang , Chun-Hua Yuan

Squeezed light constitutes a key resource for quantum optical technologies including quantum sensing, computing, communication and metrology. For many applications the generation of squeezed light typically requires at least two nonlinear…

Multimode squeezed states of light have been proposed as a resource for achieving quantum advantage in computing and sensing. Recent experiments that demonstrate multimode Gaussian states to this end have most commonly opted for spatial or…

The squeezed state of the electromagnetic field can be generated in many nonlinear optical processes and finds a wide range of applications in quantum information processing and quantum metrology. This article reviews the basic properties…

Quantum Physics · Physics 2016-07-29 A. I. Lvovsky

Quantum light sources such as squeezed light are essential for quantum information science and technologies, but the scalable production of multiple beams of them remains a challenge. Here,we experimentally demonstrate a novel approach to…

Quantum Physics · Physics 2026-05-28 Lin Wang , Xichang Zhang , Konstantin Manannikov , Nir Davidson , Ying Hu , Dongdong Hao , Yanhong Xiao

Continuous-wave (cw) squeezed states of light have applications in sensing, metrology and secure communication. In recent decades their efficient generation has been based on parametric down-conversion, which requires pumping by externally…

Quantum Physics · Physics 2019-09-04 Amrit Pal Singh , Stefan Ast , Moritz Mehmet , Henning Vahlbruch , Roman Schnabel

Squeezed spin states and squeezed light are both key resources for quantum metrology and quantum information science, but have been separately investigated in experiments so far. Simultaneous generation of these two types of quantum states…

Squeezed light is a key quantum resource that enables quantum advantages for sensing, networking, and computing applications. The scalable generation and manipulation of squeezed light with integrated platforms are highly desired for the…

Optics · Physics 2022-04-06 Pao-Kang Chen , Ian Briggs , Songyan Hou , Linran Fan

Quantum squeezed states enable precision measurements beyond the standard quantum limit, but conventional solid-state media fundamentally limit pump intensities to the ionization threshold. We demonstrate that plasma waves can mediate…

Plasma Physics · Physics 2025-07-17 Kenan Qu , Nathaniel J. Fisch

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…

Quantum Physics · Physics 2022-04-22 Christian Drago , Agata M. Brańczyk
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