Preparation of Large Fock States in Resonators with High Probability

• URL: http://arxiv.org/abs/2608.20133v1
• Date: Thu, 20 Aug 2026 14:59:55 GMT
• Title: Preparation of Large Fock States in Resonators with High Probability
• Abstract summary: We propose a protocol that combines quantum nondemolition photon-number encoding with quantum amplitude amplification.<n>With a register of up to eight qubits, near-deterministic preparation of Fock states with hundreds of excitations is possible.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Large Fock states are important resources for bosonic quantum information and quantum-enhanced metrology, but preparing them with high probability at large excitation numbers remains challenging, as deterministic methods become increasingly control-intensive, while measurement-based approaches typically suffer from low heralding probabilities. Here we propose a protocol that combines quantum nondemolition photon-number encoding with quantum amplitude amplification to enable high-probability heralded generation of large Fock states. Starting from a cavity mode prepared in a coherent state, Quantum Phase Estimation encodes photon-number information into a multi-qubit register, while Quantum Amplitude Amplification boosts the probability of a desired target outcome before measurement. The scheme has an immediate implementation in dispersive circuit-QED, but can be analogously adapted to other bosonic platforms with QND photon-number readout, such as cavity-QED. With a register of up to eight qubits, near-deterministic preparation of Fock states with hundreds of excitations is possible. We also show that the protocol can serve as the first stage of an extension toward generating a two-mode NOON state via a conditional beam-splitter operation.

Related papers

• Camera-enabled scalable homodyne detection of multimode quantum light [0.0]
  Homodyne detection is an essential quantum measurement to exploit entangled states.<n>Here we realize scalable and efficient homodyne detection by leveraging a large number of pixels in a charge-coupled-device camera.<n>This work provides a scalable method for quantum measurement, paving the way for large-scale quantum information processing.
  arXiv  Detail & Related papers  (2026-06-09T03:53:58Z)
• Heralding probability optimization for nonclassical light generated by photon counting measurements on multimode Gaussian states [0.0]
  We show that for conditional quantum state preparation schemes the heralding probability can be formulated as a finding solution to a system of equations.<n>Our approach can seamlessly incorporate bounds on the available single-moderature squeezing.<n>We focus on Gaussian states with vanishing coherent displacements, hence the conditionally generated states have well defined quadn number parity.
  arXiv  Detail & Related papers  (2026-04-28T17:55:27Z)
• Multi-Outcome Circuit Optimization for Enhanced Non-Gaussian State Generation [0.0]
  A critical requirement for fault-tolerant quantum computation is the reliable generation of non-Gaussian quantum states.<n>We propose and demonstrate a multi-outcome optimization strategy that increases the overall acceptance probability.
  arXiv  Detail & Related papers  (2026-03-18T21:40:34Z)
• Generalized Heralded Generation of Non-Gaussian States Using an Optical Parametric Amplifier [0.0]
  We introduce a generalized heralded OPA protocol that unlocks a vastly expanded class of quantum phenomena.<n>With a squeezed vacuum input, the setup functions as an integrated two-photon subtractor.<n>When fed a small-amplitude SC state, the protocol acts as a non-Gaussianity amplifier.
  arXiv  Detail & Related papers  (2025-11-26T00:51:37Z)
• Digital quantum simulation of squeezed states via enhanced bosonic encoding in a superconducting quantum processor [33.56337116542515]
  We present a fully digital approach for simulating single-mode squeezed states on a superconducting quantum processor.<n>By mapping up to 2n photonic Fock states onto n qubits, our framework leverages Gray-code-based encodings to reduce gate overhead.<n>We further optimize resource usage by restricting the simulation on Fock states with even number of photons only.
  arXiv  Detail & Related papers  (2025-05-16T06:02:25Z)
• Entanglement of photonic modes from a continuously driven two-level system [34.50067763557076]
  We experimentally generate entangled photonic modes by continuously exciting a quantum emitter, a superconducting qubit, with a coherent drive.<n>We show that entanglement is generated between modes extracted from the two sidebands of the resonance fluorescence spectrum.<n>Our approach can be utilized to distribute entanglement at a high rate in various physical platforms.
  arXiv  Detail & Related papers  (2024-07-10T18:48:41Z)
• Enhanced quantum state transfer: Circumventing quantum chaotic behavior [35.74056021340496]
  We show how to transfer few-particle quantum states in a two-dimensional quantum network. Our approach paves the way to short-distance quantum communication for connecting distributed quantum processors or registers.
  arXiv  Detail & Related papers  (2024-02-01T19:00:03Z)
• Quantum Generative Diffusion Model: A Fully Quantum-Mechanical Model for Generating Quantum State Ensemble [40.06696963935616]
  We introduce Quantum Generative Diffusion Model (QGDM) as their simple and elegant quantum counterpart. QGDM exhibits faster convergence than Quantum Generative Adversarial Network (QGAN) It can achieve 53.02% higher fidelity in mixed-state generation than QGAN.
  arXiv  Detail & Related papers  (2024-01-13T10:56:34Z)
• Quantum process tomography of continuous-variable gates using coherent states [49.299443295581064]
  We demonstrate the use of coherent-state quantum process tomography (csQPT) for a bosonic-mode superconducting circuit. We show results for this method by characterizing a logical quantum gate constructed using displacement and SNAP operations on an encoded qubit.
  arXiv  Detail & Related papers  (2023-03-02T18:08:08Z)
• Anticipative measurements in hybrid quantum-classical computation [68.8204255655161]
  We present an approach where the quantum computation is supplemented by a classical result. Taking advantage of its anticipation also leads to a new type of quantum measurements, which we call anticipative. In an anticipative quantum measurement the combination of the results from classical and quantum computations happens only in the end.
  arXiv  Detail & Related papers  (2022-09-12T15:47:44Z)
• 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)
• Bosonic field digitization for quantum computers [62.997667081978825]
  We address the representation of lattice bosonic fields in a discretized field amplitude basis. We develop methods to predict error scaling and present efficient qubit implementation strategies.
  arXiv  Detail & Related papers  (2021-08-24T15:30:04Z)
• Belief Propagation with Quantum Messages for Quantum-Enhanced Classical Communications [10.881273953303268]
  In space-based laser communications, the mean photon number per received optical pulse is much smaller than one. There is a large gap between communications capacity achievable with a receiver that performs individual pulse-by-pulse detection, and the quantum-optimal "joint-detection receiver" We show that a BPQM-receiver might attain the Holevo capacity of this BPSK-modulated pure-loss channel.
  arXiv  Detail & Related papers  (2020-03-09T18:44:34Z)

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.