Collective photon emission patterns from two atoms in free space
- URL: http://arxiv.org/abs/2202.13678v1
- Date: Mon, 28 Feb 2022 10:53:39 GMT
- Title: Collective photon emission patterns from two atoms in free space
- Authors: Stefan Richter, Sebastian Wolf, Joachim von Zanthier, Ferdinand
Schmidt-Kaler
- Abstract summary: Modification of spontaneous decay in space and time is a central topic of quantum physics.
We study the resulting collective spontaneous emission patterns in entangled Dicke states.
Our results demonstrate that the detection of a single photon can profoundly modify the collective emission of an atomic array.
- Score: 26.98676199482944
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Modification of spontaneous decay in space and time is a central topic of
quantum physics. It has been predominantly investigated in the context of
cavity quantum electrodynamics (QED), gaining new interest recently in the
domain of nano-optics. Beyond cavity-QED, spontaneous emission may be modified
also in free space due to correlations among the photon emitters, a phenomenon
known as super- and sub-radiance. Correlations may stem either from direct
interactions between the particles, from long-range exchange of photons, or by
measuring single photons in a common mode. Yet, the genuine spatial spontaneous
emission pattern of an atomic ensemble in an entangled quantum state has not
been observed so far, due to the lack of ultra-fast cameras with high spatial
resolution suited for recording single photons from single atoms. Preparing two
trapped ions in free space in entangled Dicke states via photon detection, we
study the resulting collective spontaneous emission patterns. Depending on the
symmetry of the Dicke states, associated with the direction of detection of the
first state-determining photon, we observe fundamentally different emission
patterns for the subsequently scattered photon, including super- and
sub-radiance. Our results demonstrate that the detection of a single photon can
profoundly modify the collective emission of an atomic array, here represented
by its most elementary building block of two atoms in free space.
Related papers
- Photon Entangled States and Atomic Correlations in Superradiance from Multilevel Atoms [0.0]
We show that the photonic states emitted by the multilevel atoms superradiance process exhibit entanglement in the modal degree of freedom.
A mode-independent entangled photon source is also demonstrated and discussed.
arXiv Detail & Related papers (2024-10-17T15:19:54Z) - Directional spontaneous emission in photonic crystal slabs [49.1574468325115]
Spontaneous emission is a fundamental out-of-equilibrium process in which an excited quantum emitter relaxes to the ground state due to quantum fluctuations.
One way to modify these photon-mediated interactions is to alter the dipole radiation patterns of the emitter, e.g., by placing photonic crystals near them.
Our study delves into the interaction between these directional emission patterns and the aforementioned variables, revealing the untapped potential to fine-tune collective quantum optical phenomena.
arXiv Detail & Related papers (2023-12-04T15:35:41Z) - Continuous wave quantum light control via engineered Rydberg induced
dephasing [17.857341127079305]
We analyze several variations of a single-photon optical switch operating in the continuous wave regime.
The devices are based on ensembles of Rydberg atoms that interact through van der Waals interaction.
arXiv Detail & Related papers (2023-09-19T18:39:24Z) - Entanglement of annihilation photons [141.5628276096321]
We present the results of a new experimental study of the quantum entanglement of photon pairs produced in positron-electron annihilation at rest.
Despite numerous measurements, there is still no experimental proof of the entanglement of photons.
arXiv Detail & Related papers (2022-10-14T08:21:55Z) - Direct observation of photon bound states using a single artificial atom [0.45507178426690204]
We report the direct observation of a photon-number-dependent time delay in the scattering off a single semiconductor quantum dot coupled to an optical cavity.
The reduced time delay of the two-photon bound state is a fingerprint of the celebrated example of stimulated emission, where the arrival of two photons within the lifetime of an emitter causes one photon to stimulate the emission of the other from the atom.
arXiv Detail & Related papers (2022-05-06T15:41:59Z) - Single quantum emitters with spin ground states based on Cl bound
excitons in ZnSe [55.41644538483948]
We show a new type of single photon emitter with potential electron spin qubit based on Cl impurities inSe.
Results suggest single Cl impurities are suitable as single photon source with potential photonic interface.
arXiv Detail & Related papers (2022-03-11T04:29:21Z) - Two-photon spontaneous emission of an atom in a cosmic string background [0.0]
We consider the influence of a cosmic background string in the spontaneous emission of an excited atom.
We show that the spectral distribution of the emitted photons is substantially affected by the cosmic string background.
arXiv Detail & Related papers (2022-02-04T14:00:25Z) - Investigating the coherent state detection probability of InGaAs/InP
SPAD-based single-photon detectors [55.41644538483948]
We investigate the probabilities of detecting single- and multi-photon coherent states on InGaAs/InP sine-gated and free-run avalanche diodes.
We conclude that multi-photon state detection cannot be regarded as independent events of absorption of individual single-photon states.
arXiv Detail & Related papers (2021-04-16T08:08:48Z) - Single photon randomness originating from the symmetry of dipole
emission and the unpredictability of spontaneous emission [55.41644538483948]
Quantum random number generation is a key ingredient for quantum cryptography and fundamental quantum optics.
We experimentally demonstrate quantum random number generation based on the spontaneous emission process.
The scheme can be extended to random number generation by coherent single photons with potential applications in solid-state based quantum communication at room temperature.
arXiv Detail & Related papers (2021-02-18T14:07:20Z) - Two-photon spontaneous emission in atomically thin plasmonic
nanostructures [0.0]
Two-photon states are key quantum assets, but achieving them in individual emitters is challenging.
We demonstrate that atomically thin plasmonic nanostructures can harness two-photon spontaneous emission.
This paves the way to an alternative efficient source of light-matter entanglement for on-chip quantum information processing and free-space quantum communications.
arXiv Detail & Related papers (2020-06-26T21:31:51Z) - Hyperentanglement in structured quantum light [50.591267188664666]
Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols.
Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes.
We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
arXiv Detail & Related papers (2020-06-02T18:00:04Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.