High-efficient two-step entanglement purification using hyperentanglement

• URL: http://arxiv.org/abs/2101.09006v2
• Date: Wed, 27 Jan 2021 00:25:14 GMT
• Title: High-efficient two-step entanglement purification using hyperentanglement
• Authors: Lan Zhou, Yu-Bo Sheng
• Abstract summary: Entanglement purification is a powerful method to distill the high-quality entanglement from low-quality entanglement. We propose an efficient two-step entanglement purification protocol (EPP) for the polarization entanglement. Taking use of the residual entanglement, the parties may still distill higher-quality polarization entanglement.
• Score: 0.10878040851637998
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Entanglement purification is a powerful method to distill the high-quality entanglement from low-quality entanglement. In the paper, we propose an efficient two-step entanglement purification protocol (EPP) for the polarization entanglement by using only one copy of two-photon hyperentangled state in polarization, spatial-mode, and time-bin DOFs. We suppose that the entanglement in all DOFs suffer from channel noise. In two purification steps, the parties can reduce the bit-flip error and phase-flip error in polarization DOF by consuming the imperfect entanglement in the spatial-mode and time-bin DOFs, respectively. This EPP effectively reduces the consumption of entanglement pairs and the experimental difficulty. Moreover, if consider the practical photon transmission and detector efficiencies, our EPP has much higher purification efficiency than previous recurrence EPPs. Meanwhile, when one or two purification steps fail, the distilled mixed state may have residual entanglement. Taking use of the residual entanglement, the parties may still distill higher-quality polarization entanglement. Even if not, they can still reuse the residual entanglement in the next purification round. The existence of residual entanglement benefits for increasing the yield of the EPP. All the above advantages make our EPP have potential application in future quantum information processing.

Related papers

• Adversarial Distribution Matching for Diffusion Distillation Towards Efficient Image and Video Synthesis [65.77083310980896]
  We propose Adrial Distribution Matching (ADM) to align latent predictions between real and fake score estimators for score distillation.<n>Our proposed method achieves superior one-step performance on SDXL compared to DMD2 while consuming less GPU time.<n>Additional experiments that apply multi-step ADM distillation on SD3-Medium, SD3.5-Large, and CogVideoX set a new benchmark towards efficient image and video synthesis.
  arXiv  Detail & Related papers  (2025-07-24T16:45:05Z)
• Low-Fidelity Entanglement Distillation with FIMAX [0.016385815610837167]
  entanglement distillation is the transformation of multiple copies of weakly entangled states into a smaller number of maximally entangled states. We present a comparative analysis of the stabilizer-based two-copy entanglement distillation protocol, FIMAX. Our findings demonstrate that FIMAX exhibits superior performance for low-fidelity bipartite quantum states.
  arXiv  Detail & Related papers  (2025-02-13T12:20:07Z)
• 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)
• EM Distillation for One-step Diffusion Models [65.57766773137068]
  We propose a maximum likelihood-based approach that distills a diffusion model to a one-step generator model with minimal loss of quality. We develop a reparametrized sampling scheme and a noise cancellation technique that together stabilizes the distillation process.
  arXiv  Detail & Related papers  (2024-05-27T05:55:22Z)
• Efficient multipartite entanglement purification with non-identical states [6.2232032887310345]
  We present an efficient and general multipartite entanglement purification protocol (MEPP) for N-photon systems. As a branch of entanglement purification, the recurrence MEPP actually has the reusable discarded items which are usually regarded as a failure. With these approaches, this MEPP has a higher efficiency than all previous MEPPs and it may have potential applications in the future long-distance quantum communications and networks.
  arXiv  Detail & Related papers  (2023-11-17T00:44:13Z)
• Training iterated protocols for distillation of GHZ states with variational quantum algorithms [0.0]
  We present optimized distillation schemes for preparing Greenberger-Horne-Zeilinger (GHZ) states. We find that it is possible to achieve an increased fidelity to the GHZ state, although further iterations decrease the fidelity. The schemes can also correct several types of coherent pure-state errors.
  arXiv  Detail & Related papers  (2023-11-08T12:44:49Z)
• Time-resolved purification of photon pairs from ultrasmall sources [0.0]
  We increase the purity of two-photon states generated in a 7 $mu$m film of lithium niobate from 0.002 to 0.99. With the higher purity, we were able to observe and characterize different polarization states of photon pairs generated simultaneously due to relaxed phase matching.
  arXiv  Detail & Related papers  (2023-07-10T18:56:20Z)
• Suppressing Amplitude Damping in Trapped Ions: Discrete Weak Measurements for a Non-unitary Probabilistic Noise Filter [62.997667081978825]
  We introduce a low-overhead protocol to reverse this degradation. We present two trapped-ion schemes for the implementation of a non-unitary probabilistic filter against amplitude damping noise. This filter can be understood as a protocol for single-copy quasi-distillation.
  arXiv  Detail & Related papers  (2022-09-06T18:18:41Z)
• 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)
• Hot-Band Absorption Can Mimic Entangled Two-Photon Absorption [52.77024349608834]
  We investigated the fluorescence signals from Rhodamine 6G and LDS798 excited with a CW laser or an entangled photon pair source at 1060 nm. We observed a signal that originates from hot-band absorption (HBA), which is one-photon absorption from thermally-populated vibrational levels of the ground electronic state. For the typical conditions under which E2PEF measurements are performed, contributions from the HBA process could lead to a several orders-of-magnitude overestimate of the quantum advantage for excitation efficiency.
  arXiv  Detail & Related papers  (2021-11-10T21:17:47Z)
• 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)
• High efficient multipartite entanglement purification using hyperentanglement [6.887504495088555]
  Multipartite entanglement plays an important role in controlled quantum teleportation. We present an efficient multipartite entanglement purification protocol (EPP) which can distill the high quality entangled states.
  arXiv  Detail & Related papers  (2021-01-22T02:06:37Z)
• Improving phase estimation using the number-conserving operations [8.123933627777628]
  We propose a theoretical scheme to improve the resolution and precision of phase measurement with parity detection in the Mach-Zehnder interferometer. The nonclassical properties of the proposed GSP-TMSV are investigated via average photon number (APN), anti-bunching effect, and degrees of two-mode squeezing.
  arXiv  Detail & Related papers  (2020-12-04T07:47:02Z)

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.