scholarly journals Comparison of the semiclassical and quantum optical field dynamics in a pulse-excited optical cavity with a finite number of quantum emitters

2021 ◽  
Vol 104 (20) ◽  
Author(s):  
K. Jürgens ◽  
F. Lengers ◽  
D. Groll ◽  
D. E. Reiter ◽  
D. Wigger ◽  
...  
Keyword(s):  
Finite Number ◽  
Optical Cavity ◽  
Optical Field ◽  
Quantum Optical ◽  
Quantum Emitters

scholarly journals Observation of nonlinear dynamics in an optical levitation system

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Jinyong Ma ◽  
Jiayi Qin ◽  
Geoff T. Campbell ◽  
Giovanni Guccione ◽  
Ruvi Lecamwasam ◽  
...  
Keyword(s):  
Optical Cavity ◽  
Mechanical Quality Factor ◽  
Optical Field ◽  
Free Standing ◽  
Levitation System ◽  
Active Feedback ◽  
Sideband Generation ◽  
Optical Levitation ◽  
Mechanical Oscillators ◽  
Lift Off

Abstract Optical levitation of mechanical oscillators has been suggested as a promising way to decouple the environmental noise and increase the mechanical quality factor. Here, we investigate the dynamics of a free-standing mirror acting as the top reflector of a vertical optical cavity, designed as a testbed for a tripod cavity optical levitation setup. To reach the regime of levitation for a milligram-scale mirror, the optical intensity of the intracavity optical field approaches 3 MW cm−2. We identify three distinct optomechanical effects: excitation of acoustic vibrations, expansion due to photothermal absorption, and partial lift-off of the mirror due to radiation pressure force. These effects are intercoupled via the intracavity optical field and induce complex system dynamics inclusive of high-order sideband generation, optical bistability, parametric amplification, and the optical spring effect. We modify the response of the mirror with active feedback control to improve the overall stability of the system.

scholarly journals Nonradiating and radiating modes excited by quantum emitters in open epsilon-near-zero cavities

2016 ◽  
Vol 2 (10) ◽  
pp. e1600987 ◽  
Author(s):  
Iñigo Liberal ◽  
Nader Engheta
Keyword(s):  
Degrees Of Freedom ◽  
Quantum Information Processing ◽  
State Of The Art ◽  
Optical Cavity ◽  
Dynamic Control ◽  
External Boundary ◽  
Dielectric Resonators ◽  
Optical Cavities ◽  
Epsilon Near Zero ◽  
Quantum Emitters

Controlling the emission and interaction properties of quantum emitters (QEs) embedded within an optical cavity is a key technique in engineering light-matter interactions at the nanoscale, as well as in the development of quantum information processing. State-of-the-art optical cavities are based on high quality factor photonic crystals and dielectric resonators. However, wealthier responses might be attainable with cavities carved in more exotic materials. We theoretically investigate the emission and interaction properties of QEs embedded in open epsilon-near-zero (ENZ) cavities. Using analytical methods and numerical simulations, we demonstrate that open ENZ cavities present the unique property of supporting nonradiating modes independently of the geometry of the external boundary of the cavity (shape, size, topology, etc.). Moreover, the possibility of switching between radiating and nonradiating modes enables a dynamic control of the emission by, and the interaction between, QEs. These phenomena provide unprecedented degrees of freedom in controlling and trapping fields within optical cavities, as well as in the design of cavity opto- and acoustomechanical systems.

scholarly journals The Quantum Regime Operation of Beam Splitters and Interference Filters

2019 ◽  
Author(s):  
Andre Vatarescu
Keyword(s):  
Optical Field ◽  
Single Photons ◽  
Longitudinal Field ◽  
Entangled Photons ◽  
Expectation Values ◽  
Interference Filters ◽  
Beam Splitters ◽  
Dielectric Media ◽  
Straight Line ◽  
Quantum Optical

The quantum Rayleigh spontaneous emission replaces entangled photons with independent ones in homogeneous dielectric media where single photons cannot propagate in a straight line. Single and independent groups of photons, described by the original bare states of Jaynes-Cummings model, deliver the correct expectation values for the number of photons carried by a photonic wavefront, its complex optical field, and phase quadratures. The intrinsic longitudinal field profile associated with a photonic wavefront is derived for any instantaneous number of photons. These photonic properties enable a step-by-step analysis of various beam splitters and interferometric filters. As a result, generalized expressions are derived for the correlation functions characterizing counting of coincident numbers of photons for fourth-order interference, whether classical or quantum optical, without entangled photons.

Degree of polarization as a measurable quantity for a quantum optical field containing variously polarized photons

Open Physics ◽  
2012 ◽  
Vol 10 (2) ◽  
Author(s):  
Lukasz Michalik ◽  
Andrzej Domanski
Keyword(s):  
Free Space ◽  
Thought Experiment ◽  
Optical Field ◽  
Photon Beam ◽  
Degree Of Polarization ◽  
Quantum Field ◽  
Measurable Quantity ◽  
Definition Of ◽  
Quantum Optical ◽  
Polarized Photons

AbstractWe focus on a comparison between the classical and quantum descriptions of the degree of polarization of an optical field. A quantum field containing photons with various states of polarization and which propagate in the same direction in free space one after another (a so called photon beam) is analyzed. We show that the formulated definition of degree of polarization for this quantum field leads to a measurable quantity. The concept of a thought experiment is presented.

scholarly journals Large conditional single-photon cross-phase modulation

2016 ◽  
Vol 113 (35) ◽  
pp. 9740-9744 ◽  
Author(s):  
Kristin M. Beck ◽  
Mahdi Hosseini ◽  
Yiheng Duan ◽  
Vladan Vuletić
Keyword(s):  
Phase Shift ◽  
Quantum Logic ◽  
Phase Modulation ◽  
Single Photon ◽  
Optical Cavity ◽  
Cross Phase Modulation ◽  
Quantum Process ◽  
Fundamental Limitations ◽  
Quantum Optical ◽  
And Control

Deterministic optical quantum logic requires a nonlinear quantum process that alters the phase of a quantum optical state by π through interaction with only one photon. Here, we demonstrate a large conditional cross-phase modulation between a signal field, stored inside an atomic quantum memory, and a control photon that traverses a high-finesse optical cavity containing the atomic memory. This approach avoids fundamental limitations associated with multimode effects for traveling optical photons. We measure a conditional cross-phase shift of π/6 (and up to π/3 by postselection on photons that remain in the system longer than average) between the retrieved signal and control photons, and confirm deterministic entanglement between the signal and control modes by extracting a positive concurrence. By upgrading to a state-of-the-art cavity, our system can reach a coherent phase shift of π at low loss, enabling deterministic and universal photonic quantum logic.

scholarly journals Quantum optical master equation for solid-state quantum emitters

2014 ◽  
Vol 90 (6) ◽  
Author(s):  
Ralf Betzholz ◽  
Juan Mauricio Torres ◽  
Marc Bienert
Keyword(s):  
Solid State ◽  
Master Equation ◽  
Quantum Optical ◽  
Quantum Emitters

scholarly journals Dynamic control of Purcell enhanced emission of erbium ions in nanoparticles

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Bernardo Casabone ◽  
Chetan Deshmukh ◽  
Shuping Liu ◽  
Diana Serrano ◽  
Alban Ferrier ◽  
...  
Keyword(s):  
Optical Transition ◽  
Optical Cavity ◽  
Dynamic Control ◽  
Photon Emission ◽  
Rare Earth Ion ◽  
Purcell Factor ◽  
Erbium Ions ◽  
Essential Resource ◽  
Dynamical Control ◽  
Quantum Emitters

AbstractThe interaction of single quantum emitters with an optical cavity enables the realization of efficient spin-photon interfaces, an essential resource for quantum networks. The dynamical control of the spontaneous emission rate of quantum emitters in cavities has important implications in quantum technologies, e.g., for shaping the emitted photons’ waveform or for driving coherently the optical transition while preventing photon emission. Here we demonstrate the dynamical control of the Purcell enhanced emission of a small ensemble of erbium ions doped into a nanoparticle. By embedding the nanoparticles into a fully tunable high finesse fiber based optical microcavity, we demonstrate a median Purcell factor of 15 for the ensemble of ions. We also show that we can dynamically control the Purcell enhanced emission by tuning the cavity on and out of resonance, by controlling its length with sub-nanometer precision on a time scale more than two orders of magnitude faster than the natural lifetime of the erbium ions. This capability opens prospects for the realization of efficient nanoscale quantum interfaces between solid-state spins and single telecom photons with controllable waveform, for non-destructive detection of photonic qubits, and for the realization of quantum gates between rare-earth ion qubits coupled to an optical cavity.

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