Related papers: A chiral one-dimensional atom using a quantum dot in an open microcavity

A chiral one-dimensional atom using a quantum dot in an open microcavity

URL: http://arxiv.org/abs/2110.02650v1
Date: Wed, 6 Oct 2021 10:59:33 GMT
Title: A chiral one-dimensional atom using a quantum dot in an open microcavity
Authors: Nadia O. Antoniadis, Natasha Tomm, Tomasz Jakubczyk, R\"udiger Schott, Sascha R. Valentin, Andreas D. Wieck, Arne Ludwig, Richard J. Warburton, and Alisa Javadi
Abstract summary: In nanostructures, the light-matter interaction can be engineered to be chiral. Chiral quantum optics has applications in creating nanoscopic single-photon routers, circulators, phase-shifters and two-photon gates.
Score: 0.45507178426690204
License: http://creativecommons.org/licenses/by/4.0/
Abstract: In nanostructures, the light-matter interaction can be engineered to be chiral. In the fully quantum regime, a chiral one-dimensional atom, a photon propagating in one direction interacts with the atom; a photon propagating in the other direction does not. Chiral quantum optics has applications in creating nanoscopic single-photon routers, circulators, phase-shifters and two-photon gates. Furthermore, the directional photon-exchange between many emitters in a chiral system may enable the creation of highly exotic quantum states. Here, we present a new way of implementing chiral quantum optics $-$ we use a low-noise quantum dot in an open microcavity. Specifically, we demonstrate the non-reciprocal absorption of single photons, a single-photon diode. The non-reciprocity, the ratio of the transmission in the forward-direction to the transmission in the reverse direction, is as high as 10.7 dB, and is optimised $\textit{in situ}$ by tuning the photon-emitter coupling to the optimal operating condition ($\beta = 0.5$). Proof that the non-reciprocity arises from a single quantum emitter lies in the nonlinearity with increasing input laser power, and in the photon statistics $-$ ultralow-power laser light propagating in the diode's reverse direction results in a highly bunched output ($g^{(2)}(0) = 101$), showing that the single-photon component is largely removed. The results pave the way to a single-photon phase shifter, and, by exploiting a quantum dot spin, to two-photon gates and quantum non-demolition single-photon detectors.

Related papers

Non-classical excitation of a solid-state quantum emitter [0.0]
We show that a single photon is sufficient to change the state of a solid-state quantum emitter. These results suggest future possibilities ranging from enabling quantum information transfer in a quantum network to building deterministic entangling gates for photonic quantum computing.
arXiv Detail & Related papers (2024-07-30T16:16:58Z)
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)
Direct observation of non-linear optical phase shift induced by a single quantum emitter in a waveguide [2.3776015607838747]
We experimentally realize an optical phase shift of $0.19 pi pm 0.03$ radians using a weak coherent state interacting with a single quantum dot. The nonlinear process is sensitive at the single-photon level and can be made compatible with scalable photonic integrated circuitry.
arXiv Detail & Related papers (2023-05-11T14:32:12Z)
Quantum vortices of strongly interacting photons [52.131490211964014]
Vortices are hallmark of nontrivial dynamics in nonlinear physics. We report on the realization of quantum vortices resulting from a strong photon-photon interaction in a quantum nonlinear optical medium. For three photons, the formation of vortex lines and a central vortex ring attests to a genuine three-photon interaction.
arXiv Detail & Related papers (2023-02-12T18:11:04Z)
Demonstration of deterministic SWAP gate between superconducting and frequency-encoded microwave-photon qubits [0.0]
We show a SWAP gate between the superconducting-atom and microwave-photon qubits. We confirm the bidirectional quantum state transfer between the atom and photon qubits. The present atom-photon gate, equipped with an in situ tunability of the gate type, would enable various applications in distributed quantum computation.
arXiv Detail & Related papers (2023-02-09T10:27:16Z)
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)
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)
Ultra-long photonic quantum walks via spin-orbit metasurfaces [52.77024349608834]
We report ultra-long photonic quantum walks across several hundred optical modes, obtained by propagating a light beam through very few closely-stacked liquid-crystal metasurfaces. With this setup we engineer quantum walks up to 320 discrete steps, far beyond state-of-the-art experiments.
arXiv Detail & Related papers (2022-03-28T19:37:08Z)
Optical repumping of resonantly excited quantum emitters in hexagonal boron nitride [52.77024349608834]
We present an optical co-excitation scheme which uses a weak non-resonant laser to reduce transitions to a dark state and amplify the photoluminescence from quantum emitters in hexagonal boron nitride (hBN) Our results are important for the deployment of atom-like defects in hBN as reliable building blocks for quantum photonic applications.
arXiv Detail & Related papers (2020-09-11T10:15:22Z)
Experimental reconstruction of the few-photon nonlinear scattering matrix from a single quantum dot in a nanophotonic waveguide [5.673311327126229]
Coherent photon-emitter interfaces offer a way to mediate efficient nonlinear photon-photon interactions. We experimentally study the case of a two-level emitter, a quantum dot, coupled to a single optical mode in a nanophotonic waveguide.
arXiv Detail & Related papers (2020-05-30T13:01:07Z)

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