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It depends. For a single molecule interacting with one mode of a biphoton probe, we show that the spectroscopic information has three contributions, only one of which is a genuine two-photon contribution. When all the scattered light can be…

Quantum Physics · Physics 2024-04-16 Aiman Khan , Francesco Albarelli , Animesh Datta

We create a multi-partite entangled state by storing a single photon in a crystal that contains many large atomic ensembles with distinct resonance frequencies. The photon is re-emitted at a well-defined time due to an interference effect…

In the realm of quantum information, entanglement stands as a cornerstone phenomenon. It underpins a vast array of quantum information processes, offering significant potential for advancements in quantum computing, communication, and…

Quantum Physics · Physics 2024-05-15 Armanpreet Pannu , Amr S. Helmy , Hesham El Gamal

We investigate the single-photon transport in a single-mode optical fiber coupled to an optomechanical system in the single-photon strong-coupling regime. The single-photon transmission amplitude is analytically obtained with a real-space…

Quantum Physics · Physics 2013-03-18 Xue-Xin Ren , Hao-Kun Li , Meng-Yuan Yan , Yong-Chun Liu , Yun-Feng Xiao , Qihuang Gong

We study a dissipative, mechanically coupled optomechanical system that accommodates gain and loss. The gain (loss) is engineered by driven a purely dispersive optomechanical cavity with a blue-detuned (red-detuned) electromagnetic field.…

Quantum Physics · Physics 2023-03-06 S. R. Mbokop Tchounda , P. Djorwé , M. V. Tchakui , S. G. Nana Engo

Multiphoton entanglement is an important resource for linear optics quantum computing. Here we show that a wide range of highly entangled multiphoton states, including W-states, can be prepared by interfering single photons inside a Bell…

Quantum Physics · Physics 2009-11-10 Yuan Liang Lim , Almut Beige

We introduce a scheme for remote entanglement generation for the photon polarization. The technique is based on transferring the initial frequency correlations to specific polarization-frequency correlations by local dephasing and their…

Quantum Physics · Physics 2017-07-26 S. Hamedani Raja , G. Karpat , E. -M. Laine , S. Maniscalco , J. Piilo , C. -F. Li , G. -C. Guo

Generation of mechanical squeezing has attracted a lot of interest for its nonclassical properties, applications in quantum information, and high-sensitivity measurement. Here we propose a detuning-switched method that can rapidly generate…

Quantum Physics · Physics 2023-03-21 Yaohua Li , An-Ning Xu , Long-Gang Huang , Yong-Chun Liu

We describe a scheme that allows for the generation of any desired N-photon state on demand. Under ideal conditions, this requires only N single photon sources, laser pulses and linear optics elements. First, the sources should be…

Quantum Physics · Physics 2009-11-13 Almut Beige , Yuan Liang Lim , Christian Schoen

Single-photon entangled states, i.e. states describing two optical paths sharing a single photon, constitute the simplest form of entanglement. Yet they provide a valuable resource in quantum information science. Specifically, they lie at…

The radiation pressure induced coupling between an optical cavity field and a mechanical oscillator can create entanglement between them. In previous works this entanglement was treated as that of the quantum fluctuations of the cavity and…

Quantum Physics · Physics 2014-08-14 Qing Lin , Bing He , R. Ghobadi , Christoph Simon

Cavity-optomechanics enables photon-phonon interaction and correlations by harnessing the radiation-pressure force. Here, we realize a ``cavity-in-a-membrane'' optomechanical architecture which allows detection of the motion of…

Optics · Physics 2022-09-19 Mengdi Zhao , Kejie Fang

We propose an efficient microwave-photonic modulator as a resource for stationary entangled microwave-optical fields and develop the theory for deterministic entanglement generation and quantum state transfer in multi-resonant electro-optic…

Quantum Physics · Physics 2019-12-03 Alfredo Rueda , William Hease , Shabir Barzanjeh , Johannes M. Fink

We describe a scheme showing signatures of macroscopic optomechanical entanglement generated by radiation pressure in a cavity system with a massive movable mirror. The system we consider reveals genuine multipartite entanglement. We…

Quantum Physics · Physics 2009-11-13 M. Paternostro , D. Vitali , S. Gigan , M. S. Kim , C. Brukner , J. Eisert , M. Aspelmeyer

We show how stationary entanglement between an optical cavity field mode and a macroscopic vibrating mirror can be generated by means of radiation pressure. We also show how the generated optomechanical entanglement can be quantified and we…

Quantum Physics · Physics 2007-05-23 D. Vitali , S. Gigan , A. Ferreira , H. R. Boehm , P. Tombesi , A. Guerreiro , V. Vedral , A. Zeilinger , M. Aspelmeyer

We present an experimental implementation of a polarization-entangled photon pair source based on beam displacers. The down-converted photons are emitted via spontaneous parametric down-conversion in a non-degenerate and type-0 process. We…

Quantum Physics · Physics 2024-10-18 Minjae Hong , Rodrigo Gomez , Valerio Flavio Gili , Jorge Fuenzalida , Markus Gräfe

Recognized as a potential resource for quantum technologies and a possible testbed for fundamental physics, the control and preparation of nonclassical states of mechanical oscillators has been explored extensively. Within optomechanics,…

Quantum Physics · Physics 2024-07-30 Andrew J. Shepherd , Ryan O. Behunin

We consider the creation of polarization entangled light from parametric down- conversion driven by an intense pulsed pump inside a cavity. The multi-photon states produced are close approximations to singlet states of two very large spins.…

Quantum Physics · Physics 2009-11-10 Christoph Simon , Dik Bouwmeester

The fluorescence of a single dipole excited by an intense light pulse can lead to the generation of another light pulse containing a single photon. The influence of the duration and energy of the excitation pulse on the number of photons in…

Quantum Physics · Physics 2009-11-06 Rosa Brouri , Alexios Beveratos , Jean-Philippe Poizat , Philippe Grangier

We provide an argument to infer stationary entanglement between light and a mechanical oscillator based on continuous measurement of light only. We propose an experimentally realizable scheme involving an optomechanical cavity driven by a…