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We present the observation of optical fields carrying squeezed vacuum states at sideband frequencies from 10Hz to above 35MHz. The field was generated with type-I optical parametric oscillation below threshold at 1064nm. A coherent,…

Quantum Physics · Physics 2007-05-23 Simon Chelkowski , Henning Vahlbruch , Karsten Danzmann , Roman Schnabel

Constructing large-scale quantum resources is an important foundation for further improving the efficiency and scalability of quantum communication. Here, we present an efficient extraction and stable control scheme of 40 pairs of entangled…

Quantum Physics · Physics 2025-08-11 Xuan Liu , Shaoping Shi , Yimiao Wu , Xuan Wang , Long Tian , Wei Li , Yajun Wang , Yaohui Zheng

Quantum squeezing of mechanical resonator is important for studying the macroscopic quantum effects and the precision metrology of weak forces. Here we give a theoretical study of a hybrid atom-optomechanical system in which the…

Quantum Physics · Physics 2015-12-22 Dong-Yang Wang , Cheng-Hua Bai , Hong-Fu Wang , Ai-Dong Zhu , Shou Zhang

Optical tweezers are a powerful tool for the precise positioning of a variety of small objects, including single neutral atoms. Once trapped, atoms can be cooled to the motional ground state of the tweezers. For a more advanced control of…

We propose a method of trapping atoms in arrays near to the surface of a composite nanophotonic device with optimal coupling to a single cavity mode. The device, comprised of a nanofiber mounted on a grating, allows the formation of…

Quantum Physics · Physics 2017-06-28 Mark Sadgrove , Kali P. Nayak

High-Q optical microresonators combine low losses and high optical energy concentration in a small effective mode volume, making them an attractive platform for optical sensors. While light is confined in the microresonator by total…

Quantum Physics · Physics 2025-11-18 Dariya Salykina , Daniil Shakhbaziants , Igor Bilenko , Farid Khalili

A prerequisite for universal quantum computation and other large-scale quantum information processors is the careful preparation of quantum states in massive numbers or of massive dimension. For continuous variable approaches to quantum…

We experimentally realized an optical nanofiber-based cavity by combining a 1-D photonic crystal and Bragg grating structures. The cavity morphology comprises a periodic, triplex air-cube introduced at the waist of the nanofiber. The cavity…

Optics · Physics 2017-08-02 Wenfang Li , Jinjin Du , Viet Giang Truong , Sile Nic Chormaic

This paper presents a simplification design for the fiber cavity ring-down technique. The new configuration is no longer in ring cavity and is converted to a linear cavity. The proposed linear cavity is created with a single fibre coupler…

Instrumentation and Detectors · Physics 2017-12-04 Susana Silva , Orlando Frazão

We report generation and measurement of a squeezed vacuum from a semi-monolithic Fabry-Perot optical parametric oscillator (OPO) up to 100 MHz at 1550 nm. The output coupler of the OPO is a flat surface of a nonlinear crystal with partially…

Quantum Physics · Physics 2019-10-22 Naoto Takanashi , Wataru Inokuchi , Takahiro Serikawa , Akira Furusawa

Optical cavities are a foundational technology for controlling light-matter interactions. While interfacing a single cavity to either an atom or ensemble has become a standard tool, the advent of single atom control in large atomic arrays…

Atomic Physics · Physics 2026-02-09 Anna Soper , Danial Shadmany , Adam L. Shaw , Lukas Palm , David I. Schuster , Jonathan Simon

We present squeezed light that is robust against spatial mode mismatch (beam displacement, tilt, and beam-size difference), which is generated from a self-imaging optical parametric oscillator below the threshold. We investigate the quantum…

Quantum Physics · Physics 2021-10-12 Chan Roh , Geunhee Gwak , Young-Sik Ra

Photophoretic forces - which are of thermal origin - have defined an alternative route of optical trapping of absorbing microparticles in air. Here, we show that a single multi-mode fiber facilitates significantly more robust optical traps…

Optics · Physics 2023-01-11 Souvik Sil , Anita Pahi , Aman Anil Punse , Ayan Banerjee

We demonstrate quantum correlations in the transverse plane of continuous wave light beams by producing -4.0 dB, -2.6 dB and -1.5 dB of squeezing in the TEM00, TEM10 and TEM20 Hermite- Gauss modes with an optical parametric amplifier,…

We present a novel technique for measuring the characteristics of a magneto-optical trap for cold atoms by monitoring the spontaneous emission from trapped atoms coupled into the guided mode of a tapered optical nanofiber. We show that the…

Quantum Physics · Physics 2014-07-24 M. J. Morrissey , K. Deasy , Y. Wu , S. Chakrabarti , S. Nic Chormaic

We explore the use of Fabry-P\'erot cavities as high-pass filters for squeezed light, and show that they can increase the sensitivity of interferometric gravitational-wave detectors without the need for long (kilometer scale) filter…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Thomas Corbitt , Nergis Mavalvala , Stan Whitcomb

We demonstrate cavity QED conditions in the Purcell regime for single quantum emitters on the surface of an optical nanofiber. The cavity is formed by combining an optical nanofiber and a nanofabricated grating to create a composite…

Optics · Physics 2014-10-08 Ramachandrarao Yalla , Mark Sadgrove , Kali P. Nayak , Kohzo Hakuta

We demonstrate a neutral atom networking node that combines high photon collection efficiency with high atom photon entanglement fidelity in a compact, fiber integrated platform. A parabolic mirror is used both to form the trap and to…

Quantum Physics · Physics 2026-05-13 A. Safari , E. Oh , P. Huft , G. Chase , J. Zhang , M. Saffman

Optical parametric downconversion has proven to be a valuable source of nonclassical light. The process is inherently able to produce twin beam correlations along with individual intensity squeezing of either parametric beam, when pumped…

Quantum Physics · Physics 2013-05-29 J. U. Fürst , D. V. Strekalov , D. Elser , A. Aiello , U. L. Andersen , Ch. Marquardt , G. Leuchs

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…