Remote preparation of optical cat states based on Gaussian entanglement

• URL: http://arxiv.org/abs/2304.08863v1
• Date: Tue, 18 Apr 2023 09:53:34 GMT
• Title: Remote preparation of optical cat states based on Gaussian entanglement
• Authors: Dongmei Han, Fengxiao Sun, Na Wang, Yu Xiang, Meihong Wang, Mingsheng Tian, Qiongyi He, and Xiaolong Su
• Abstract summary: Remote state preparation enables one to prepare and manipulate quantum state non-locally. We present experimental preparation of optical cat states based on a remotely distributed two-mode Gaussian entangled state in a lossy channel.
• Score: 12.528753261720757
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Remote state preparation enables one to prepare and manipulate quantum state non-locally. As an essential quantum resource, optical cat state is usually prepared locally by subtracting photons from a squeezed vacuum state. For remote quantum information processing, it is essential to prepare and manipulate optical cat states remotely based on Gaussian entanglement, which remains a challenge. Here, we present experimental preparation of optical cat states based on a remotely distributed two-mode Gaussian entangled state in a lossy channel. By performing photon subtraction and homodyne projective measurement at Alice's station, an optical cat state is prepared remotely at Bob's station. Furthermore, the prepared cat state is rotated by changing Alice's measurement basis of homodyne detection, which demonstrates the remote manipulation of it. By distributing two modes of the two-mode Gaussian entangled state in lossy channels, we demonstrate that the remotely prepared cat state can tolerate much more loss in Alice's channel than that in Bob's channel. We also show that cat states with amplitudes larger than 2 can be prepared by increasing the squeezing level and subtracting photon numbers. Our results make a crucial step toward remote hybrid quantum information processing involving discrete- and continuous-variable techniques.

Related papers

• The formation of Schrodinger cat-like states in the process of spontaneous parametric down-conversion [50.161078038675285]
  We show the formation of Schrodinger cat-like states during the spontaneous parametric down-conversion process (SPDC) For the first time, we show the formation of the Schrodinger cat-like states in the fundamental and second harmonic modes under non-dissipative and dissipative regimes.
  arXiv  Detail & Related papers  (2024-05-23T13:11:07Z)
• Simultaneous preparation of two optical cat states based on a nondegenerate optical parametric amplifier [1.9594274388434523]
  We prepare two optical cat states simultaneously based on a nondegenerate optical parametric amplifier. By subtracting one photon from each of two squeezed vacuum states, two odd cat states with superposition direction in phase space are prepared simultaneously. Results make a step toward preparing the four-component cat state, which has potential applications in fault-tolerant quantum cavities.
  arXiv  Detail & Related papers  (2023-05-15T08:09:51Z)
• 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)
• Integrated Quantum Optical Phase Sensor [48.7576911714538]
  We present a photonic integrated circuit fabricated in thin-film lithium niobate. We use the second-order nonlinearity to produce a squeezed state at the same frequency as the pump light and realize circuit control and sensing with electro-optics. We anticipate that on-chip photonic systems like this, which operate with low power and integrate all of the needed functionality on a single die, will open new opportunities for quantum optical sensing.
  arXiv  Detail & Related papers  (2022-12-19T18:46:33Z)
• Experimental preparation and manipulation of squeezed cat states via an all-optical in-line squeezer [21.214288360269972]
  A high-performance all-optical in-line squeezer is developed to prepare a squeezed cat state and manipulate the phase of the quadrature squeezing. The generation rate of squeezed cat states reaches 2 kHz, the same as that of the initial cat state.
  arXiv  Detail & Related papers  (2022-10-25T03:58:21Z)
• 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)
• Experimental preparation of generalized cat states for itinerant microwave photons [6.219063677193734]
  We demonstrate a versatile approach to creating generalized itinerant cat states in the microwave domain. We show that, with a coherent control of the qubit state, a full control over the coherent state superposition can be realized.
  arXiv  Detail & Related papers  (2022-07-11T04:33:32Z)
• Generating and detecting entangled cat states in dissipatively coupled degenerate optical parametric oscillators [1.238954119278917]
  "Cat states" embody quantum coherence in an accessible way and can be harnessed for fundamental tests and quantum information tasks alike. We show that a dissipative coupling between degenerate optical parametric oscillators extends this to two-mode entangled cat states. We numerically explore the parameter regime for the successful generation of transient two-mode entangled cat states.
  arXiv  Detail & Related papers  (2021-03-30T05:46:44Z)
• Bose-Einstein condensate soliton qubit states for metrological applications [58.720142291102135]
  We propose novel quantum metrology applications with two soliton qubit states. Phase space analysis, in terms of population imbalance - phase difference variables, is also performed to demonstrate macroscopic quantum self-trapping regimes.
  arXiv  Detail & Related papers  (2020-11-26T09:05:06Z)
• Generation of Schr\"odinger cat states through photon-assisted Landau-Zener-St\"uckelberg interferometry [0.0]
  We propose a conceptually new method for creating Schr"odinger cat states, based on photon-assisted Landau-Zener-St"uckelberg interferometry. We show that by initializing the qubit in one of its basis states, performing three consecutive sweeps of the qubit energy splitting across the 1-photon resonance, the parity of the photon field can be purified to very high degree.
  arXiv  Detail & Related papers  (2020-08-27T14:37:57Z)
• Neural network quantum state tomography in a two-qubit experiment [52.77024349608834]
  Machine learning inspired variational methods provide a promising route towards scalable state characterization for quantum simulators. We benchmark and compare several such approaches by applying them to measured data from an experiment producing two-qubit entangled states. We find that in the presence of experimental imperfections and noise, confining the variational manifold to physical states greatly improves the quality of the reconstructed states.
  arXiv  Detail & Related papers  (2020-07-31T17:25:12Z)

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.