Related papers: Collective Photon Assisted Dressing of Atomic Levels by the number $N$ of Correlated Atoms

Collective Photon Assisted Dressing of Atomic Levels by the number $N$ of Correlated Atoms

URL: http://arxiv.org/abs/2006.04498v2
Date: Tue, 9 Jun 2020 08:54:26 GMT
Title: Collective Photon Assisted Dressing of Atomic Levels by the number $N$ of Correlated Atoms
Authors: Reuben Shuker and Gennady A. Koganov
Abstract summary: Many body collective correlations among the atoms, spins or, in general, quantum systems may prove to be a suitable method. A novel operator is introduced that expresses photon-induced excitation exchange that takes in account energy conservation.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Enhancement of the sensitivities of optical magnetometers, atomic clocks and atom interferometers and other quantum metrology devices requires introducing new physical processes to improve on their present achievements. Many body collective correlations among the atoms, spins or, in general, quantum systems may prove to be a suitable method. As these correlations introduce interference terms in the intensity of the scattering amplitudes, they may enhance the signal as $N(N-1)$ for N correlated quantum systems. These correlations enhance the signal to noise ratio by a factor of $N^2$ and contribute to better sensitivity in quantum metrology. Moreover atomic correlation may provide quantum noise limit, Heisenberg limit. In the present communication excitation exchange induced by photons in a cavity between two atoms is calculated and clearly exhibits correlation and collective effects. A novel operator is introduced that expresses photon-induced excitation exchange that takes in account energy conservation, $V_{ij}=\hat{a}^\dag\sigma_i\sigma_j^\dag\hat{a}$, $\sigma_i=\left|g\right\rangle_{i}\left\langle e\right|_{i}$ is lowering operator of $i$-th atom, and $\hat{a}^\dag,\hat{a}$ are photon creation and annihilation operators. Here $i$ and $j$ stand for two atoms. This operator describes real or virtual photon assisted dipole-dipole interaction. Moreover, it conserves the total number of excitations in the joint em field and the quantum system. Experimental challenges are suggested.

Related papers

Realization of three and four-body interactions between momentum states in a cavity through optical dressing [0.0]
We observe an effective $n=3$-body Hamiltonian interaction using an ensemble of laser-cooled atoms in a high finesse optical cavity. The resulting photon mediated interactions are not only $n>2$-body but also all-to-all(-to-all)
arXiv Detail & Related papers (2024-10-16T00:29:45Z)
Realisation of a Coherent and Efficient One-Dimensional Atom [0.15274583259797847]
A coherent and efficiently coupled one-dimensional atom provides a large nonlinearity, enabling photonic quantum gates. Here, we use a semiconductor quantum dot in an open microcavity as an implementation of a one-dimensional atom. Our results pave the way towards the creation of exotic photonic states and two-photon phase gates.
arXiv Detail & Related papers (2024-02-19T21:48:12Z)
All-Optical Nuclear Quantum Sensing using Nitrogen-Vacancy Centers in Diamond [52.77024349608834]
Microwave or radio-frequency driving poses a significant limitation for miniaturization, energy-efficiency and non-invasiveness of quantum sensors. We overcome this limitation by demonstrating a purely optical approach to coherent quantum sensing. Our results pave the way for highly compact quantum sensors to be employed for magnetometry or gyroscopy applications.
arXiv Detail & Related papers (2022-12-14T08:34:11Z)
Quantum-limited millimeter wave to optical transduction [50.663540427505616]
Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
arXiv Detail & Related papers (2022-07-20T18:04:26Z)
Formation of robust bound states of interacting microwave photons [148.37607455646454]
One of the hallmarks of interacting systems is the formation of multi-particle bound states. We develop a high fidelity parameterizable fSim gate that implements the periodic quantum circuit of the spin-1/2 XXZ model. By placing microwave photons in adjacent qubit sites, we study the propagation of these excitations and observe their bound nature for up to 5 photons.
arXiv Detail & Related papers (2022-06-10T17:52:29Z)
Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
arXiv Detail & Related papers (2022-06-03T14:52:34Z)
Quantum density matrix theory for a laser without adiabatic elimination of the population inversion: transition to lasing in the class-B limit [62.997667081978825]
No class-B quantum density-matrix model is available to date, capable of accurately describing coherence and photon correlations within a unified theory. Here we carry out a density-matrix theoretical approach for generic class-B lasers, and provide closed equations for the photonic and atomic reduced density matrix in the Fock basis of photons. This model enables the study of few-photon bifurcations and non-classical photon correlations in class-B laser devices, also leveraging quantum descriptions of coherently coupled nanolaser arrays.
arXiv Detail & Related papers (2022-05-26T16:33:51Z)
Detecting a single atom in a cavity using the $\chi^{(2)}$ nonlinear medium [13.768073095397243]
We propose a protocol for detecting a single atom in a cavity with the help of the $chi(2)$ nonlinear medium. The proposed protocol exhibits some advantages, such as controllable squeezing strength and exponential increase of atom-cavity coupling strength.
arXiv Detail & Related papers (2022-02-22T07:40:00Z)
Almost indistinguishable single photons via multiplexing cascaded biphotons with cavity modulation and phase compensation [0.0]
We study the frequency entanglement of a biphoton generated from alkali metal atomic ensembles. The purity of single photon reaches up to $0.999$ and the entanglement entropy $S$ of the biphoton reduces to $0.006$. An extremely low frequency entanglement implies an almost indistinguishable single photon source.
arXiv Detail & Related papers (2022-01-26T15:34:26Z)
Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
arXiv Detail & Related papers (2020-05-19T16:46:44Z)

This list is automatically generated from the titles and abstracts of the papers in this site.