Detecting single photons is not always necessary to evidence interference of photon probability amplitudes
- URL: http://arxiv.org/abs/2405.01050v4
- Date: Fri, 2 Aug 2024 15:16:05 GMT
- Title: Detecting single photons is not always necessary to evidence interference of photon probability amplitudes
- Authors: Eric Lantz, Fabrice Devaux, Serge Massar,
- Abstract summary: Subtracting accidental coincidences is a common practice quantum optics experiments.
We show that if one removes accidental coincidences the measurement results are quantitatively the same.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Subtracting accidental coincidences is a common practice quantum optics experiments. For zero mean Gaussian states, such as squeezed vacuum, we show that if one removes accidental coincidences the measurement results are quantitatively the same, both for photon coincidences at very low flux and for intensity covariances. Consequently, pure quantum effects at the photon level, like interference of photon wave functions or photon bunching, are reproduced in the correlation of fluctuations of macroscopic beams issued from spontaneous down conversion. This is true both in experiment if the detection resolution is smaller than the coherence cell (size of the mode), and in stochastic simulations based on sampling the Wigner function. We discuss the limitations of this correspondence, such as Bell inequalities (for which one cannot substract accidental coincidences), highly multimode situations such as quantum imaging, and higher order correlations.
Related papers
- Measuring the Evolution of Entanglement in Compton Scattering [101.11630543545151]
The behavior of quantum entanglement during scattering is identical to the behavior of initially classically correlated photons up to a constant factor equal to two.
Our dedicated experiment with photons confirms these results and explains the "Puzzle of Decoherence" observed recently.
arXiv Detail & Related papers (2024-06-20T14:21:23Z) - Experimental realization of deterministic and selective photon addition
in a bosonic mode assisted by an ancillary qubit [50.591267188664666]
Bosonic quantum error correcting codes are primarily designed to protect against single-photon loss.
Error correction requires a recovery operation that maps the error states -- which have opposite parity -- back onto the code states.
Here, we realize a collection of photon-number-selective, simultaneous photon addition operations on a bosonic mode.
arXiv Detail & Related papers (2022-12-22T23:32:21Z) - On-chip quantum information processing with distinguishable photons [55.41644538483948]
Multi-photon interference is at the heart of photonic quantum technologies.
Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources.
We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
arXiv Detail & Related papers (2022-10-14T18:16:49Z) - 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) - Observation-dependent suppression and enhancement of two-photon
coincidences by tailored losses [68.8204255655161]
Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter.
In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement.
Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
arXiv Detail & Related papers (2021-05-12T06:47:35Z) - Observations of near-perfect nonclassical correlation using coherent
light [12.507208769851653]
We show the physics of anticorrelation on a beam splitter using sub-Poisson distributed coherent photons.
A particular phase relation between paired photons is unveiled for anticorrelation, satisfying the complementarity theory of quantum mechanics.
arXiv Detail & Related papers (2021-05-05T04:27:51Z) - Symmetry allows for distinguishability in totally destructive
many-particle interference [52.77024349608834]
We investigate, in a four photon interference experiment in a laser-written waveguide structure, how symmetries control the suppression of many-body output events of a $J_x$ unitary.
We show that totally destructive interference does not require mutual indistinguishability between all, but only between symmetrically paired particles.
arXiv Detail & Related papers (2021-02-19T16:37:19Z) - Inelastic scattering of a photon by a quantum phase-slip [0.0]
We show that a quantum phase-slip fluctuation in high-impedance superconducting waveguides can split a single microwave photon into a large number of lower-energy photons.
The measured decay rates are explained without adjustable parameters in the framework of a new model of a quantum impurity in a Luttinger liquid.
arXiv Detail & Related papers (2020-10-05T15:35:21Z) - Entanglement and Impropriety [0.0]
Replacing operators with complex Gaussian random variables in the Bogoliubov transformations for squeezed states, we find that the resulting variables are not only correlated but also improper.
A simple threshold exceedance model of photon detection is considered and used to demonstrate how the behavior of improper Gaussian random variables can mimic that of entangled photon pairs when coincidence post-selection is performed.
arXiv Detail & Related papers (2020-08-10T18:59:16Z) - Boson sampling with random numbers of photons [0.0]
We show a novel boson sampling scheme where the probability of success increases instead of decreasing.
This is achieved by sampling at the same time in the number of occupied input ports and the number of input photons per port.
arXiv Detail & Related papers (2020-06-05T17:53:07Z)
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.