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In contrast to the general argument that the spontaneous decay is intrinsically incoherent in nature and detrimental to quantum entanglement, here, we show that nearly perfect entanglement between two bright pump fields can be realized via…

Quantum Physics · Physics 2025-05-05 Xihua Yang , Mingfei Cheng , Xiaodong Zeng , Zhenghong Li , Min Xiao

We theoretically investigate the possibility to generate non-classical states of optical and mechanical modes of optical cavities, distant from each other. A setup comprised of two identical cavities, each with one fixed and one movable…

Quantum Physics · Physics 2013-05-30 Chaitanya Joshi , Jonas Larson , Mats Jonson , Erika Andersson , Patrik Ohberg

We present an optomechanical model to show that entanglement can be a sufficient condition for quantum synchronization of two mechanical oscillators. As both these entities can be characterized in terms of variances of a set of EPR-like…

Quantum Physics · Physics 2023-05-05 Manju , Shubhrangshu Dasgupta , Asoka Biswas

We use a microscopic model, the Mirror-Oscillator-Field (MOF) model proposed by Galley, Behunin and Hu [Phys. Rev. A 87, 043832 (2013)], to describe the quantum entanglement between a mirror's center of mass (CoM) motion and a field. In…

Quantum Physics · Physics 2015-09-02 Kanupriya Sinha , Shih-Yuin Lin , B. L. Hu

We have theoretically investigated a generation of entangled photons from biexcitons in a semiconductor film with thickness in nano-to-bulk crossover regime. In contrast to the cases of quantum dots and bulk materials, we can highly control…

Other Condensed Matter · Physics 2010-09-20 Motoaki Bamba , Hajime Ishihara

Negativity has been adopted to investigate the entanglement in a system composed of a two-level atom and a two-mode cavity field. Effects of Kerr-like medium and the number of photon inside the cavity on the entanglement are studied. Our…

Quantum Physics · Physics 2015-05-13 Liu Jia , Chen Zi-Yu , Bu Shen-Ping , Zhang Guo-Feng

We study the photon creation inside a perfectly conducting, spherical oscillating cavity. The electromagnetic field inside the cavity is described by means of two scalar fields which satisfy Dirichlet and (generalized) Neumann boundary…

Quantum Physics · Physics 2009-11-13 F. D. Mazzitelli , X. Orsi Millan

We study multi-partite entanglement, the generation of EPR states and quantum steering in a three-mode optomechanical system composed of an atomic ensemble located inside a single-mode cavity with a movable mirror. The cavity mode is driven…

Quantum Physics · Physics 2014-03-10 Qiongyi He , Zbigniew Ficek

Can entanglement and the quantum behavior in physical systems survive at arbitrary high temperatures? In this Letter we show that this is the case for a electromagnetic field mode in an optical cavity with a movable mirror in a thermal…

Quantum Physics · Physics 2007-05-23 A. Ferreira , A. Guerreiro , V. Vedral

Resonant excitation of atoms and ions in macroscopic cavities has lead to exceptional control over quanta of light. Translating these advantages into the solid state with emitters in microcavities promises revolutionary quantum technologies…

We study an isolated, perfectly reflecting, mirror illuminated by an intense laser pulse. We show that the resulting radiation pressure efficiently entangles a mirror vibrational mode with the two reflected optical sideband modes of the…

Quantum Physics · Physics 2009-11-10 Stefano Pirandola , Stefano Mancini , David Vitali , Paolo Tombesi

Two close parallel mirrors attract due to a small force (Casimir effect) originating from the electromagnetic quantum vacuum uctuations of the electromagnetic field. These vacuum uctuations can also induce motional forces exerted upon one…

We propose a two-dimensional model consisting of photons and photon pairs. In the model, the mixed gas of photons and photon pairs is formally equivalent to a two-dimensional system of massive bosons with non-vanishing chemical potential,…

Quantum Gases · Physics 2015-06-04 Jianjun Zhang , Jianhui Yuan

The emission of entangled light from planar semiconductor microcavities is studied and the entanglement properties are analyzed and quantified. Phase-matching of the intra-cavity scattering dynamics for multiple pump beams or pulses,…

Quantum Physics · Physics 2015-06-05 D. Pagel , H. Fehske , J. Sperling , W. Vogel

The purpose of this paper is to study two-photon dynamics induced by the coherent feedback control of a cavity quantum electrodynamics (cavity-QED) system coupled to a waveguide. In this set-up, the two-level system in the cavity can work…

Quantum Physics · Physics 2023-05-08 Haijin Ding , Guofeng Zhang

Many phenomena and fundamental predictions, ranging from Hawking radiation to the early evolution of the Universe rely on the interplay between quantum mechanics and gravity or more generally, quantum mechanics in curved spacetimes.…

Quantum Physics · Physics 2022-12-22 Marko Toroš , Marion Cromb , Mauro Paternostro , Daniele Faccio

Single-photon sources based on semiconductor quantum dots find several applications in quantum information processing due to their high single-photon indistinguishability, on-demand generation, and low multiphoton emission. In this context,…

We study electro-mechanical entanglement in a system where a massive membrane is capacitively coupled to a {\it low frequency} LC resonator. In opto- and electro-mechanics, the entanglement between a megahertz (MHz) mechanical resonator and…

Quantum Physics · Physics 2020-06-25 Jie Li , Simon Gröblacher

This work reports the spontaneous emergence of a photon current in a class of spin-cavity systems, where an assemble of quantum emitters interact with distinct photon modes confined in tunneling-coupled cavities. Specifically, with…

Quantum Physics · Physics 2025-02-03 Lei Qiao , Jiangbin Gong

The fields of cavity quantum electrodynamics and magnetism have recently merged into \textit{`cavity spintronics'}, investigating a quasiparticle that emerges from the strong coupling between standing electromagnetic waves confined in a…