Experimental demonstration of remotely creating Wigner negativity via quantum steering

• URL: http://arxiv.org/abs/2204.11552v1
• Date: Mon, 25 Apr 2022 10:57:31 GMT
• Title: Experimental demonstration of remotely creating Wigner negativity via quantum steering
• Authors: Shuheng Liu, Dongmei Han, Na Wang, Yu Xiang, Fengxiao Sun, Meihong Wang, Zhongzhong Qin, Qihuang Gong, Xiaolong Su and Qiongyi He
• Abstract summary: We experimentally prepare optical non-Gaussian state with negative Wigner function at a remote node via local non-Gaussian operation. We show that the Wigner negativity is sensitive to loss on the target mode, but robust to loss on the mode performing photon subtraction. As an application, we present that the generated non-Gaussian state exhibits metrological power in quantum phase estimation.
• Score: 12.074674469415063
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Non-Gaussian states with Wigner negativity are of particular interest in quantum technology due to their potential applications in quantum computing and quantum metrology. However, how to create such states at a remote location remains a challenge, which is important for efficiently distributing quantum resource between distant nodes in a network. Here, we experimentally prepare optical non-Gaussian state with negative Wigner function at a remote node via local non-Gaussian operation and shared Gaussian entangled state existing quantum steering. By performing photon subtraction on one mode, Wigner negativity is created in the remote target mode. We show that the Wigner negativity is sensitive to loss on the target mode, but robust to loss on the mode performing photon subtraction. This experiment confirms the connection between the remotely created Wigner negativity and quantum steering. As an application, we present that the generated non-Gaussian state exhibits metrological power in quantum phase estimation.

Related papers

• Adapting coherent-state superpositions in noisy channels [0.5999777817331317]
  Quantum non-Gaussian states are crucial for the fundamental understanding of non-linear bosonic systems. We propose an optimal protection of superpositions of coherent states against a sequence of asymmetric thermal lossy channels by suitable squeezing operations.
  arXiv  Detail & Related papers  (2024-06-03T08:00:18Z)
• Harnessing quantumness of states using discrete Wigner functions under (non)-Markovian quantum channels [0.0]
  The study of Wigner negativity and its evolution under different quantum channels can provide insight into the stability and robustness of quantum states. We construct different negative quantum states which can be used as a resource for quantum computation and quantum teleportation.
  arXiv  Detail & Related papers  (2023-03-09T14:41:38Z)
• 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)
• Simulation of Entanglement Generation between Absorptive Quantum Memories [56.24769206561207]
  We use the open-source Simulator of QUantum Network Communication (SeQUeNCe), developed by our team, to simulate entanglement generation between two atomic frequency comb (AFC) absorptive quantum memories. We realize the representation of photonic quantum states within truncated Fock spaces in SeQUeNCe. We observe varying fidelity with SPDC source mean photon number, and varying entanglement generation rate with both mean photon number and memory mode number.
  arXiv  Detail & Related papers  (2022-12-17T05:51:17Z)
• Quantum emulation of the transient dynamics in the multistate Landau-Zener model [50.591267188664666]
  We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity. Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
  arXiv  Detail & Related papers  (2022-11-26T15:04:11Z)
• QuanGCN: Noise-Adaptive Training for Robust Quantum Graph Convolutional Networks [124.7972093110732]
  We propose quantum graph convolutional networks (QuanGCN), which learns the local message passing among nodes with the sequence of crossing-gate quantum operations. To mitigate the inherent noises from modern quantum devices, we apply sparse constraint to sparsify the nodes' connections. Our QuanGCN is functionally comparable or even superior than the classical algorithms on several benchmark graph datasets.
  arXiv  Detail & Related papers  (2022-11-09T21:43:16Z)
• Deterministic Free-Propagating Photonic Qubits with Negative Wigner Functions [0.0]
  Coherent states ubiquitous in classical and quantum communications, squeezed states used in quantum sensing, and even highly-entangled states studied in the context of quantum computing can be produced deterministically. We describe the first fully deterministic preparation of non-Gaussian Wigner-negative states of light, obtained by mapping the internal state of an intracavdberg superatom onto an optical qubit.
  arXiv  Detail & Related papers  (2022-09-05T16:37:42Z)
• Robustness of negativity of the Wigner function to dissipation [0.0]
  Wigner functions negativity could exist only if the overall quantum efficiency $eta$ of the setup is higher than 1/2. We prove that this condition is not only necessary but also a sufficient one. In the case of bright (multi-photon) non-Gaussian quantum states, the negativity dependence on $eta$ is highly non-linear.
  arXiv  Detail & Related papers  (2022-01-10T10:19:59Z)
• Quantification of Wigner Negativity Remotely Generated via Einstein-Podolsky-Rosen Steering [11.427047150248708]
  Wigner negativity plays an essential role in quantum computing and simulation using continuous-variable systems. Motivated by the demand of real-world quantum network, here we investigate the shareability of generated Wigner negativity in the multipartite scenario. Our results pave the way for exploiting Wigner negativity as a valuable resource for numerous quantum information protocols based on non-Gaussian scenario.
  arXiv  Detail & Related papers  (2021-04-01T13:07:54Z)
• Propagating Wigner-Negative States Generated from the Steady-State Emission of a Superconducting Qubit [52.332094293284904]
  We generate Wigner-negative states from a superconducting qubit. We observe a large Wigner logarithmic negativity, in excess of 0.08, in agreement with theory.
  arXiv  Detail & Related papers  (2021-01-23T16:30:31Z)
• Efficient simulatability of continuous-variable circuits with large Wigner negativity [62.997667081978825]
  Wigner negativity is known to be a necessary resource for computational advantage in several quantum-computing architectures. We identify vast families of circuits that display large, possibly unbounded, Wigner negativity, and yet are classically efficiently simulatable. We derive our results by establishing a link between the simulatability of high-dimensional discrete-variable quantum circuits and bosonic codes.
  arXiv  Detail & Related papers  (2020-05-25T11:03:42Z)

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.