High fidelity photon-photon gates by scattering off a two-level quantum emitter

• URL: http://arxiv.org/abs/2603.10805v1
• Date: Wed, 11 Mar 2026 14:13:36 GMT
• Title: High fidelity photon-photon gates by scattering off a two-level quantum emitter
• Abstract summary: Scheme is based on repeated scattering off a two-level quantum emitter embedded in a chiral or one-sided waveguide.<n>We analyze the implementation of a control-Z gate and a deterministic Bell-state analyzer for photonic qubits.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a scheme for implementing a high-fidelity non-linear phase shift on a photonic state. The scheme is based on repeated scattering off a two-level quantum emitter embedded in a chiral or one-sided waveguide. The waveguide is equipped with elements inducing second-order dispersion and temporal phase shifts, which effectively form a harmonic trap and confine the photon pulses to a Gaussian shape. The same quantum emitter can be used for each scattering, and thus, only one quantum emitter is needed in this scheme. To illustrate the application of our scheme for photonic quantum computing and quantum communication, we analyze the implementation of a control-Z gate and a deterministic Bell-state analyzer for photonic qubits. Through numerical optimization, we show that we can reach a control-Z gate fidelity of $\mathcal{F} \sim 99.2\%$ ($\mathcal{F} \sim 96\%$) and a success probability of $P_s \sim 99.6 \%$ ($P_s\sim 98 \%$) for a Bell-state measurement with $N=17$ ($N=5$) scatterings.

Related papers

• Full-Stack High-Volume Quantum Networking Architecture based on Photonic-Integrated Tin Vacancy Centers in Diamond [0.7027228059084675]
  Solid state quantum emitters are a leading platform for photonic quantum networking with memory nodes.<n>Inhomogeneous distribution of quantum emitters spread the frequency spectrum of qubits, making them distinguishable and therefore not a reliable resource for distributed quantum entanglement.<n>We demonstrate a full-stack approach to integrating nearly indistinguishable tin vacancy (SnV$-$) quantum emitters on a frequency-tunable photonic interposer.
  arXiv  Detail & Related papers  (2026-08-12T04:26:50Z)
• Mapping photon-number regimes in single-emitter lasers [41.99844472131922]
  We present a numerical analysis of an open quantum system consisting of an incoherently pumped three-level emitter strongly coupled to a single cavity mode.<n>We find that laser behavior can emerge from minimal photon populations.<n>Our findings can be applied to define the operational limits of single-emitter light sources.
  arXiv  Detail & Related papers  (2026-06-30T07:10:49Z)
• Dynamic stimulated emission for deterministic addition and subtraction of propagating photons [0.6157382820537719]
  We introduce the concept of textitdynamic stimulated emission, whereby a quantum emitter undergoes stimulated emission with a time-dependent coupling.<n>We show that for both two- and three-level emitters, this process can be used to deterministically add or subtract a photon to a single propagating optical mode.<n>Our protocols provide a path towards integrating quantum emitters to construct efficient sources of single-mode non-Gaussian light beyond single photons.
  arXiv  Detail & Related papers  (2025-12-10T14:57:58Z)
• Pulse-based optimization of quantum many-body states with Rydberg atoms in optical tweezer arrays [39.58317527488534]
  We explore a pulse-based variational quantum eigensolver algorithm for Rydberg atoms in optical tweezer arrays.<n>We numerically demonstrate that the ground states of the one-dimensional antiferromagnetic Heisenberg model and the mixed-field Ising model can be accurately prepared.
  arXiv  Detail & Related papers  (2025-07-25T10:51:49Z)
• Passive photonic CZ gate with two-level emitters in chiral multi-mode waveguide QED [41.94295877935867]
  We design a passive conditional gate between co-propagating photons using an array of only two-level emitters. The key resource is to harness the effective photon-photon interaction induced by the chiral coupling of the emitter array to two waveguide modes. We show how to harness this non-linear phase shift to engineer a conditional, deterministic photonic gate in different qubit encodings.
  arXiv  Detail & Related papers  (2024-07-08T18:00:25Z)
• Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
  Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols. We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
  arXiv  Detail & Related papers  (2023-04-24T15:43:08Z)
• High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band [28.279056210896716]
  Single indistinguishable photons at telecom C-band wavelengths are essential for quantum networks and the future quantum internet. We demonstrate the high- throughput fabrication of quantum-photonic integrated devices operating at C-band wavelengths based on epitaxial semiconductor quantum dots. Further improvements in yield and coherence properties will pave the way for implementing single-photon non-linear devices and advanced quantum networks at telecom wavelengths.
  arXiv  Detail & Related papers  (2023-04-05T15:39:22Z)
• Deterministic Photon Sorting in Waveguide QED Systems [3.4756461334223228]
  We show that a pair of two-level emitters, chirally coupled to a waveguide, may scatter single- and two-photon components of an input pulse into temporal modes with a fidelity $gtrsim 0.9997$. The presented scheme can be employed to construct logic elements for propagating photons, such as a deterministic nonlinear-sign gate with a fidelity $gtrsim 0.9995$.
  arXiv  Detail & Related papers  (2022-02-14T19:20:05Z)
• Passive quantum phase gate for photons based on three level emitters [0.0]
  We present a fully passive method for implementing a quantum phase gate between two photons travelling in a one-dimensional wave guide. The gate is based on chirally coupled emitters in a three-level $V$ configuration. We show that the fidelity can reach values $mathcalFsim99%$ with a gate success probability of $>99%$ for as few as 8 emitters.
  arXiv  Detail & Related papers  (2021-12-21T16:17:58Z)
• An integrated whispering-gallery-mode resonator for solid-state coherent quantum photonics [6.082529164787429]
  We report on an integrated microdisk cavity containing self-assembled quantum dots to coherently route photons. We show how this integrated system can coherently re-route photons between the drop and bus ports. We discuss the strengths and limitations of this approach, focusing on how it can be used to increase the efficiency of quantum devices.
  arXiv  Detail & Related papers  (2021-07-26T12:51:39Z)
• Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
  Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
  arXiv  Detail & Related papers  (2020-05-19T16:46:44Z)
• Generating Spatially Entangled Itinerant Photons with Waveguide Quantum Electrodynamics [43.53795072498062]
  In this work, we demonstrate the deterministic generation of such photons using superconducting transmon qubits that are directly coupled to a waveguide. We generate two-photon N00N states and show that the state and spatial entanglement of the emitted photons are tunable via the qubit frequencies.
  arXiv  Detail & Related papers  (2020-03-16T16:03:27Z)

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.