Optimizing spontaneous parametric down-conversion sources for boson sampling

• URL: http://arxiv.org/abs/2001.03596v1
• Date: Fri, 10 Jan 2020 18:24:37 GMT
• Title: Optimizing spontaneous parametric down-conversion sources for boson sampling
• Authors: R. van der Meer, J.J. Renema, B. Brecht, C. Silberhorn, P.W.H. Pinkse
• Abstract summary: We show that an optimal trade-off between indistinguishability and losses can always be found for spontaneous downconversion. A 50-photon scattershot boson-sampling experiment using SPDC sources is possible from a computational complexity point of view.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: An important step for photonic quantum technologies is the demonstration of a quantum advantage through boson sampling. In order to prevent classical simulability of boson sampling, the photons need to be almost perfectly identical and almost without losses. These two requirements are connected through spectral filtering, improving one leads to a decrease of the other. A proven method of generating single photons is spontaneous parametric downconversion (SPDC). We show that an optimal trade-off between indistinguishability and losses can always be found for SPDC. We conclude that a 50-photon scattershot boson-sampling experiment using SPDC sources is possible from a computational complexity point of view. To this end, we numerically optimize SPDC sources under the regime of weak pumping and with a single spatial mode.

Related papers

• 2DQuant: Low-bit Post-Training Quantization for Image Super-Resolution [83.09117439860607]
  Low-bit quantization has become widespread for compressing image super-resolution (SR) models for edge deployment. It is notorious that low-bit quantization degrades the accuracy of SR models compared to their full-precision (FP) counterparts. We present a dual-stage low-bit post-training quantization (PTQ) method for image super-resolution, namely 2DQuant, which achieves efficient and accurate SR under low-bit quantization.
  arXiv  Detail & Related papers  (2024-06-10T06:06:11Z)
• Analytical solutions for optimal photon absorption into inhomogeneous spin memories [0.7388859384645263]
  We investigate for optimal photon absorption a quantum electrodynamical model of an inhomogeneously-broadened spin ensemble coupled to a single-mode cavity. We find the optimal cooperativity for different parameters and identify cases where absorption with a success probability larger than $99%$ is achieved.
  arXiv  Detail & Related papers  (2024-01-09T18:42:18Z)
• Generation and characterization of polarization-entangled states using quantum dot single-photon sources [0.0]
  Single-photon sources based on semiconductor quantum dots find several applications in quantum information processing. We implement this approach via a simple and compact design that generates entangled photon pairs in the polarization degree of freedom. Our source shows long-term stability and high quality of the generated entangled states, thus constituting a reliable building block for optical quantum technologies.
  arXiv  Detail & Related papers  (2023-08-04T16:07:12Z)
• Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
  Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols. We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
  arXiv  Detail & Related papers  (2023-04-24T15:43:08Z)
• 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)
• Amplification of cascaded downconversion by reusing photons with a switchable cavity [62.997667081978825]
  We propose a scheme to amplify triplet production rates by using a fast switch and a delay loop. Our proof-of-concept device increases the rate of detected photon triplets as predicted.
  arXiv  Detail & Related papers  (2022-09-23T15:53:44Z)
• Second-order correlations and purity of unheralded single photons from spontaneous parametric down-conversion [1.7396274240172125]
  Various quantum technology applications require high-purity single photons with high generation rate. We present a revised expression to calculate second-order temporal correlation function, $g(2)$ for any fixed time window (bin)
  arXiv  Detail & Related papers  (2022-07-14T15:09:58Z)
• Perfect photon indistinguishability from a set of dissipative quantum emitters [0.0]
  Single photon sources based on semiconductor quantum dot (QD) platforms are restricted to low temperature (T) operation. Technical requirements for maintaining high indistinguishability (I) at high T are beyond the state of the art. Recent theoretical approaches have shown promising results by implementing two-dipole-coupled-emitter systems.
  arXiv  Detail & Related papers  (2022-04-11T14:57:52Z)
• Complete conversion between one and two photons in nonlinear waveguides with tailored dispersion [62.997667081978825]
  We show theoretically how to control coherent conversion between a narrow-band pump photon and broadband photon pairs in nonlinear optical waveguides. We reveal that complete deterministic conversion as well as pump-photon revival can be achieved at a finite propagation distance.
  arXiv  Detail & Related papers  (2021-10-06T23:49:44Z)
• Scalable multiphoton generation from cavity-synchronized single-photon sources [5.187669487527287]
  Design relies on multiple single-photon sources, each coupled to a waveguide, and all of them interact with a common cavity mode. For a state-of-the-art circuit QED implementation, this scheme supports the creation of single photons with purity, indistinguishability, and efficiency of $99%$ at rates of $sim $MHz. This is orders of magnitude more efficient than previous demultiplexed sources for boson sampling and enables the realization of deterministic multi-photon sources and scalable quantum information processing with photons.
  arXiv  Detail & Related papers  (2020-09-04T20:20:05Z)
• 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.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.