Experimental one-step deterministic entanglement purification

• URL: http://arxiv.org/abs/2110.04970v1
• Date: Mon, 11 Oct 2021 02:48:49 GMT
• Title: Experimental one-step deterministic entanglement purification
• Authors: Cen-Xiao Huang, Xiao-Min Hu1, Bi-Heng Liu, Lan Zhou, Yu-Bo Sheng, Chuan-Feng Li, Guang-Can Guo
• Abstract summary: Entanglement purification is a key step in quantum repeaters. We report the first experimental demonstration of deterministic entanglement purification using polarization and spatial mode hyperentanglement.
• Score: 0.06597195879147555
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Entanglement purification is to distill high-quality entangled states from low-quality entangled states. It is a key step in quantum repeaters, determines the efficiency and communication rates of quantum communication protocols, and is hence of central importance in long-distance communications and quantum networks. In this work, we report the first experimental demonstration of deterministic entanglement purification using polarization and spatial mode hyperentanglement. After purification, the fidelity of polarization entanglement arises from $0.268\pm0.002$ to $0.989\pm0.001$. Assisted with robust spatial mode entanglement, the total purification efficiency can be estimated as $10^{9}$ times that of the entanglement purification protocols using two copies of entangled states when one uses the spontaneous parametric down-conversion sources. Our work may have the potential to be implemented as a part of full repeater protocols.

Related papers

• Generalized Parity Measurements and Efficient Large Multi-component Cat State Preparation with Quantum Signal Processing [0.0]
  Generalized parity measurements are instrumental for the preparation of non-trivial quantum states. We show a proposal for efficient and robust generalized parity measurements based on Quantum Signal Processing.
  arXiv  Detail & Related papers  (2024-09-08T18:47:22Z)
• Protocols and Trade-Offs of Quantum State Purification [4.732131350249]
  We introduce a general state purification framework designed to achieve the highest fidelity with a specified probability. For i.i.d. quantum states under depolarizing noise, our framework can replicate the purification protocol proposed by Barenco and al. We prove the protocols' optimality for two copies of noisy states with any dimension and confirm its optimality for higher numbers of copies and dimensions.
  arXiv  Detail & Related papers  (2024-04-01T14:34:45Z)
• Performance of entanglement purification including maximally entangled mixed states [0.0]
  Entanglement between distant quantum systems is a critical resource for implementing quantum communication. We propose an entanglement purification protocol based on two entangling two-qubit operations. Two variants of the core protocol are introduced and shown to be more practical in certain scenarios.
  arXiv  Detail & Related papers  (2024-02-06T18:34:34Z)
• 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)
• A protocol to create a multi-particle entangled state for quantum-enhanced sensing [0.0]
  We show how entanglement can be adiabatically produced with two control beams and by exploiting cavity-mediated interactions between the atoms. Our methods will allow for optimal generation of entanglement for the measurement protocol we propose.
  arXiv  Detail & Related papers  (2022-05-26T19:14:20Z)
• Efficient Bipartite Entanglement Detection Scheme with a Quantum Adversarial Solver [89.80359585967642]
  Proposal reformulates the bipartite entanglement detection as a two-player zero-sum game completed by parameterized quantum circuits. We experimentally implement our protocol on a linear optical network and exhibit its effectiveness to accomplish the bipartite entanglement detection for 5-qubit quantum pure states and 2-qubit quantum mixed states.
  arXiv  Detail & Related papers  (2022-03-15T09:46:45Z)
• Experimental Bayesian calibration of trapped ion entangling operations [48.43720700248091]
  We develop and characterize an efficient calibration protocol to automatically estimate and adjust experimental parameters of the widely used Molmer-Sorensen entangling gate operation. We experimentally demonstrate a median gate infidelity of $1.3(1)cdot10-3$, requiring only $1200pm500$ experimental cycles, while completing the entire gate calibration procedure in less than one minute.
  arXiv  Detail & Related papers  (2021-12-02T16:59:00Z)
• Long-distance entanglement purification for quantum communication [5.308453006160182]
  We propose and report a high-efficiency and long-distance entanglement purification using only one pair of hyperentangled states. Our results offer the potential to be implemented as part of a full quantum repeater and large scale quantum network.
  arXiv  Detail & Related papers  (2021-01-19T03:25:01Z)
• Entanglement purification by counting and locating errors with entangling measurements [62.997667081978825]
  We consider entanglement purification protocols for multiple copies of qubit states. We use high-dimensional auxiliary entangled systems to learn about number and positions of errors in the noisy ensemble.
  arXiv  Detail & Related papers  (2020-11-13T19:02:33Z)
• Entanglement-assisted entanglement purification [62.997667081978825]
  We present a new class of entanglement-assisted entanglement purification protocols that can generate high-fidelity entanglement from noisy, finite-size ensembles. Our protocols can deal with arbitrary errors, but are best suited for few errors, and work particularly well for decay noise.
  arXiv  Detail & Related papers  (2020-11-13T19:00:05Z)
• Gaussian conversion protocols for cubic phase state generation [104.23865519192793]
  Universal quantum computing with continuous variables requires non-Gaussian resources. The cubic phase state is a non-Gaussian state whose experimental implementation has so far remained elusive. We introduce two protocols that allow for the conversion of a non-Gaussian state to a cubic phase state.
  arXiv  Detail & Related papers  (2020-07-07T09:19:49Z)

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.