Spin-photon Qubits for Scalable Quantum Network

Abstract

Solid-state quantum light sources offer a scalable pathway for interfacing stationary spin qubits with flying photonic qubits, forming the backbone of future quantum networks. Telecom-band spin-photonic qubits, operating in the 1260-1675 nm wavelength range, are particularly well-suited for long-distance quantum communication due to minimal loss in standard optical fibers. Achieving scalability, however, hinges on fulfilling several stringent criteria: coherent spin-state control, deterministic and indistinguishable single-photon emission, and integration with nanophotonic structures that enhance radiative properties, such as lifetime, coherence, and photon indistinguishability. This study explores the state-of-the-art spin-photonic qubits across solid-state platforms, including diamond color centers, silicon carbide defect centers, quantum dots, and two-dimensional materials. Special attention is given to silicon-based emitters, particularly G, T, C- and Ci-centers, which promise monolithic integration with complementary metal-oxide-semiconductor (CMOS) technology and telecom-band operation. We classify these systems based on spin-photon interface availability, CMOS process compatibility, and emitter scalability. We also discuss recent advances in cavity quantum electrodynamics (cQED), including Purcell enhancement and quality factor engineering in integrated photonic (circuits) environments. The work highlights emerging demonstrations of quantum networking over metropolitan scales and outlines the trajectory toward chip-scale quantum photonic integrated circuits (QPICs). It combines deterministic emitter creation, coherent spin manipulation, and quantum information processing. These developments pave the way for global quantum networks, enabling secure communication, distributed quantum computing, and quantum-enhanced sensing.

67 pages, 9 figures, Review

References in corpus (185)

• The nitrogen-vacancy colour centre in diamond
• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• Driven coherent oscillations of a single electron spin in a quantum dot
• Near optimal single photon sources in the solid state
• Electron spin relaxation by nuclei in semiconductor quantum dots
• Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System
• Solid-state electronic spin coherence time approaching one second
• Storage and retrieval of single photons transmitted between remote quantum memories
• Exciton Binding Energy of Monolayer WS2
• Semiconductor Spin Qubits
• Electron spin coherence exceeding seconds in high purity silicon
• Realization of a multi-node quantum network of remote solid-state qubits
• Photonic quantum information processing: a concise review
• Large-scale quantum-emitter arrays in atomically thin semiconductors
• Experimental demonstration of memory-enhanced quantum communication
• Unconditional quantum teleportation between distant solid-state qubits
• On-demand semiconductor single-photon source with near-unity indistinguishability
• Room Temperature Initialisation and Readout of Intrinsic Spin Defects in a Van der Waals Crystal
• Quantum repeaters: From quantum networks to the quantum internet
• Tunable and high purity room-temperature single photon emission from atomic defects in hexagonal boron nitride
• Deterministic delivery of remote entanglement on a quantum network
• High Quality factor photonic crystal nanobeam cavities
• Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot
• Isolated electron spins in silicon carbide with millisecond-coherence times
• Indistinguishable photons from separated silicon-vacancy centers in diamond
• Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout
• A Coherent Spin-Photon Interface in Silicon
• Large-scale integration of near-indistinguishable artificial atoms in hybrid photonic circuits
• Entanglement Distillation between Solid-State Quantum Network Nodes
• Theory of the ground state spin of the NV- center in diamond: I. Fine structure, hyperfine structure, and interactions with electric, magnetic and strain fields
• Theory of the ground state spin of the NV- center in diamond: II. Spin solutions, time-evolution, relaxation and inhomogeneous dephasing
• Isolating and enhancing the emission of single erbium ions using a silicon nanophotonic cavity
• Enhanced photon-extraction efficiency from deterministic quantum-dot microlenses
• A heterogeneous III-V/silicon integration platform for on-chip quantum photonic circuits with single quantum dot devices
• One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment
• Scalable integrated single-photon source
• Coherence time of over a second in a telecom-compatible quantum memory storage material
• Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
• High-fidelity spin and optical control of single silicon vacancy centres in silicon carbide
• Quantum networks based on color centers in diamond
• Visible-to-telecom quantum frequency conversion of light from a single quantum emitter
• Quantum Gates and Memory using Microwave Dressed States
• Chip-integrated visible-telecom photon pair sources for quantum communication
• Suppressing Spin Qubit Dephasing by Nuclear State Preparation
• Integration of Single Photon Emitters in 2D Layered Materials with a Silicon Nitride Photonic Chip
• Coherent spin-qubit photon coupling
• Self-Consistent Measurement and State Tomography of an Exchange-Only Spin Qubit
• Quantum network nodes based on diamond qubits with an efficient nanophotonic interface
• Quantum decoherence dynamics of divacancy spins in silicon carbide
• Integrated quantum photonics with silicon carbide: challenges and prospects
• Coherent spin control of a nanocavity-enhanced qubit in diamond
• Quantum Communication Using Semiconductor Quantum Dots
• Position-controlled quantum emitters with reproducible emission wavelength in hexagonal boron nitride
• Robust multi-qubit quantum network node with integrated error detection
• Entanglement and control of single quantum memories in isotopically engineered silicon carbide
• Photonic Crystal Cavities from Hexagonal Boron Nitride
• Scalable Quantum Photonics with Single Color Centers in Silicon Carbide
• Coherent control of the silicon-vacancy spin in diamond
• Transform-limited photons from a coherent tin-vacancy spin in diamond
• Coherent control of nitrogen-vacancy center spins in silicon carbide at room temperature
• High-Resolution Correlation Spectroscopy of 13C Spins Near a Nitrogen-Vacancy Center in Diamond
• Loss-resistant state teleportation and entanglement swapping using a quantum-dot spin in an optical microcavity
• A quantum light emitting diode for the standard telecom window around 1550 nm
• Electronic structure, spin-orbit coupling, and interlayer interaction in bulk MoS2 and WS2
• Coherent Acoustic Control of a Single Silicon Vacancy Spin in Diamond
• Single artificial atoms in silicon emitting at telecom wavelengths
• Optical charge state control of spin defects in 4H-SiC
• Purcell enhancement of a single silicon carbide color center with coherent spin control
• Demonstration of quantum entanglement between a single electron spin confined to an InAs quantum dot and a photon
• Strongly Cavity-Enhanced Spontaneous Emission from Silicon-Vacancy Centers in Diamond
• Microwave-driven coherent operations of a semiconductor quantum dot charge qubit
• Quantum control of a spin qubit coupled to a photonic crystal cavity
• Active Temporal Multiplexing of Indistinguishable Heralded Single Photons
• Two-photon interference using background-free quantum frequency conversion of single photons from a semiconductor quantum dot
• All-optical control of a solid-state spin using coherent dark states
• A silicon-integrated telecom photon-spin interface
• Coherence of Spin Qubits in Silicon
• Assembly and coherent control of a register of nuclear spin qubits
• Ultralow mode-volume photonic crystal nanobeam cavities for high efficiency coupling to individual carbon nanotube emitters
• Selective Purcell enhancement of two closely linked zero-phonon transitions of a silicon carbide color center
• Indistinguishable and efficient single photons from a quantum dot in a planar nanobeam waveguide
• Silicon carbide for integrated photonics
• Purcell Effect in the Stimulated and Spontaneous Emission Rates of Nanoscale Semiconductor Lasers
• Purcell-enhanced single-photon emission from nitrogen-vacancy centers coupled to a tunable microcavity
• Triggered single-photon generation and resonance fluorescence in ultra-low loss integrated photonic circuits
• Deterministic generation of all-photonic quantum repeaters from solid-state emitters
• A Quantum Photonic Interface for Tin-Vacancy Centers in Diamond
• Strong coupling between a photon and a hole spin in silicon
• Site-Controlled Telecom Single-Photon Emitters in Atomically-thin MoTe2
• Wafer-scale nanofabrication of telecom single-photon emitters in silicon
• Purcell-enhanced single photon source based on a deterministically placed WSe${}_2$ monolayer quantum dot in a circular Bragg grating cavity
• Resonance fluorescence of GaAs quantum dots with near-unity photon indistinguishability
• Engineering telecom single-photon emitters in silicon for scalable quantum photonics
• Coherent electrical readout of defect spins in 4H-SiC by photo-ionization at ambient conditions
• Entanglement Swapping with Semiconductor-generated Photons
• Optical properties of an ensemble of G-centers in silicon
• All-silicon light-emitting diodes waveguide-integrated with superconducting single-photon detectors
• Radiative enhancement of single quantum emitters in WSe2 monolayers using site-controlled metallic nano-pillars
• Electrically driven optical interferometry with spins in silicon carbide
• Stark Tuning and Electrical Charge State Control of Single Divacancies in Silicon Carbide
• Quantum well stabilized point defect spin qubits
• Deterministic generation of large-scale entangled photonic cluster state from interacting solid state emitters
• Roadmap for Photonics with 2D Materials
• All-silicon quantum light source by embedding an atomic emissive center in a nanophotonic cavity
• Individually Addressable and Spectrally Programmable Artificial Atoms in Silicon Photonics
• Erbium dopants in silicon nanophotonic waveguides
• Continuous dynamical decoupling of a single diamond nitrogen-vacancy center spin with a mechanical resonator
• High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band
• Cryogenic operation of silicon photonic modulators based on DC Kerr effect
• Coherence of a charge stabilised tin-vacancy spin in diamond
• Two-Dimensional Photonic Crystal Slab Nanocavities on Bulk Single-Crystal Diamond
• Purcell enhancement of single-photon emitters in silicon
• Two-photon interference from a quantum emitter in hexagonal boron nitride
• Observation of large spontaneous emission rate enhancement of quantum dots in a broken-symmetry slow-light waveguide
• Cavity-Enhanced 2D Material Quantum Emitters Deterministically Integrated with Silicon Nitride Microresonators
• Highly enriched ${}^{28}$Si reveals remarkable optical linewidths and fine structure for well-known damage centers
• Telecom-band quantum optics with ytterbium atoms and silicon nanophotonics
• Near-unity indistinguishability single photon source for large-scale integrated quantum optics
• Narrow optical transitions in erbium-implanted silicon waveguides
• A bright nanowire single photon source based on SiV centers in diamond
• Greatly Enhanced Emission from Spin Defects in Hexagonal Boron Nitride Enabled by a Low-Loss Plasmonic Nano-Cavity
• Cavity-coupled telecom atomic source in silicon
• Optical Charge Injection and Full Coherent Control of Spin-Qubit in the Telecom C-band Emitting Quantum Dot
• Spin-photon entanglement interfaces in silicon carbide defect centers
• On-Demand Generation of Indistinguishable Photons in the Telecom C-Band using Quantum Dot Devices
• GHz-clocked teleportation of time-bin qubits with a telecom C-band quantum dot
• Cavity enhanced emission from a silicon T center
• Optimization of photoluminescence from W centers in silicon-on-insulator
• Waveguide-integrated silicon T centres
• Telecom-band quantum interference of frequency-converted photons from remote detuned NV centers
• A Bright Source of Telecom Single Photons Based on Quantum Frequency Conversion
• Scalable spin-photon entanglement by time-to-polarization conversion
• Indistinguishable photons from an artificial atom in silicon photonics
• Coherent control of electron spin qubits in silicon using a global field
• Spontaneous emission control of single quantum dots by electromechanical tuning of a photonic crystal cavity
• Electron-nuclear dynamics in a quantum dot under non-unitary electron control
• Controllable freezing of the nuclear spin bath in a single-atom spin qubit
• Quantum interference between photons from an atomic ensemble and a remote atomic ion
• Experimental Generation of Spin-Photon Entanglement in Silicon Carbide
• Optical and electronic properties of low-density InAs/InP quantum dot-like structures devoted to single-photon emitters at telecom wavelengths
• High-efficiency single photon emission from a silicon T-center in a nanobeam
• Optical single-shot readout of spin qubits in silicon
• Microwave-assisted spectroscopy technique for studying charge state in nitrogen-vacancy ensembles in diamond
• Shallow Silicon Vacancy Centers with lifetime-limited optical linewidths in Diamond Nanostructures
• Impact of surface and laser-induced noise on the spectral stability of implanted nitrogen-vacancy centers in diamond
• Assignment of the NV0 575 nm zero-phonon line in diamond to a 2E-2A2 transition
• Quantum storage of entangled photons at telecom wavelengths in a crystal
• High Purcell-enhancement in quantum-dot hybrid circular Bragg grating cavities for GHz-clockrate generation of indistinguishable photons
• Effect of Localization on Photoluminescence and Zero-Field Splitting of Silicon Color Centers
• Hyperfine level structure in nitrogen-vacancy centers near the ground-state level anticrossing
• Spin-photon entanglement with direct photon emission in the telecom C-band
• Site-Controlled Purcell-Induced Bright Single Photon Emitters in Hexagonal Boron Nitride
• Long Spin Coherence and Relaxation Times in Nanodiamonds Milled from Polycrystalline ${}^{12}$C Diamond
• Position-controlled Telecom Single Photon Emitters Operating at Elevated Temperatures
• Telecom Quantum Photonic Interface for a ${}^{40}$Ca${}^{+}$ Single-Ion Quantum Memory
• Microring resonator-coupled photoluminescence from silicon W~centers
• Two-photon interference between disparate sources for quantum networking
• Cavity-enhanced photon indistinguishability at room temperature and telecom wavelengths
• Efficient activation of telecom emitters in silicon upon ns pulsed laser annealing
• Hong-Ou-Mandel Interference
• Isotopic enrichment of silicon by high fluence ${}^{28}$Si${}^{-}$ ion implantation
• Genuine and faux single G centers in carbon-implanted silicon
• A solid-state temporally multiplexed quantum memory array at the single-photon level
• Electrically-triggered spin-photon devices in silicon
• Quantum Efficiency and Oscillator Strength of InGaAs Quantum Dots for Single-Photon Sources emitting in the Telecommunication O-Band
• Fiber-taper collected emission from NV centers in high-$Q/V$ diamond microdisks
• Bright and Purcell-enhanced single photon emission from a silicon G center
• Theory of the divacancy in 4H-SiC: Impact of Jahn-Teller effect on optical properties
• Two-Photon Interference from an InAs Quantum Dot emitting in the Telecom C-Band
• Purcell enhanced and tunable single-photon emission at telecom wavelengths from InAs quantum dots in circular photonic crystal resonators
• A solid-state source of single and entangled photons at diamond SiV${}^{-}$-center transitions operating at 80K
• Entanglement of a nuclear spin qubit register in silicon photonics
• Hopping of the center-of-mass of single G centers in silicon-on-insulator
• Improving On-Demand Single Photon Source Coherence and Indistinguishability Through a Time-Delayed Coherent Feedback
• Laser-induced spectral diffusion of T centers in silicon nanophotonic devices
• Role of indistinguishability and entanglement in Hong-Ou-Mandel interference and finite bandwidth effects of frequency entangled photons
• Time-bin entanglement in the deterministic generation of linear photonic cluster states
• On-demand generation of entangled photons pairs in the telecom O-band from nanowire quantum dots
• Deterministic Integration of hBN Single-Photon Emitters on SiN Waveguides via Femtosecond Laser Processing
• Erbium-implanted WS2 flakes with room-temperature photon emission at telecom wavelengths
• Nanoscale positioning and in-situ enhancement of single G center in silicon using a fluorescence-localization technique
• A Concise Primer on Solid-State Quantum Emitters
• A Generalized Formulation of Two-Particle Interference
• Optical spin readout of a silicon color center in the telecom L-band
• Silicon T centre hyperfine structure and memory protection schemes