Spin-photon entanglement with direct photon emission in the telecom C-band
arXiv:2310.16930 · doi:10.1038/s41467-024-53964-1
Abstract
The ever-evolving demands for computational power and for a securely connected world dictate the development of quantum networks where entanglement is distributed between connected parties. Solid-state quantum emitters in the telecom C-band are a promising platform for quantum communication applications due to the minimal absorption of photons at these wavelengths, "on-demand" generation of single photon flying qubits, and ease of integration with existing network infrastructure. Here, we use an InAs/InP quantum dot to implement an optically active spin-qubit, based on a negatively charged exciton where the electron spin degeneracy is lifted using a Voigt magnetic field. We investigate the coherent interactions of the spin-qubit system under resonant excitation, demonstrating high fidelity spin initialisation and coherent control using picosecond pulses. We further use these tools to measure the coherence of a single, undisturbed electron spin in our system. Finally, we report the first demonstration of spin-photon entanglement in a solid-state system capable of direct emission into the telecom C-band.
arXiv comment19 pages (including references), 5 figures
References in corpus (24)
- Near optimal single photon sources in the solid state
- Heralded entanglement between solid-state qubits separated by 3 meters
- All photonic quantum repeaters
- Deterministic Generation of a Cluster State of Entangled Photons
- Sequential generation of entangled multi-qubit states
- A photonic cluster state machine gun
- Generation of heralded entanglement between distant hole spins
- Visible-to-telecom quantum frequency conversion of light from a single quantum emitter
- Transform-limited single photons from a single quantum dot
- Coherent control and suppressed nuclear feedback of a single quantum dot hole qubit
- One-way quantum repeater based on near-deterministic photon-emitter interfaces
- Demonstration of quantum entanglement between a single electron spin confined to an InAs quantum dot and a photon
- Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength
- Quantum computers based on electron spins controlled by ultra-fast, off-resonant, single optical pulses
- Ideal refocusing of an optically active spin qubit under strong hyperfine interactions
- Entangling a Hole Spin with a Time-Bin Photon: A Waveguide Approach for Quantum Dot Sources of Multi-Photon Entanglement
- Quantum Control of Qubits and Atomic Motion Using Ultrafast Laser Pulses
- Improving a solid-state qubit through an engineered mesoscopic environment
- Optical Charge Injection and Full Coherent Control of Spin-Qubit in the Telecom C-band Emitting Quantum Dot
- Towards a source of multi-photon entangled states for linear optical quantum computing
- Deterministic photon source of genuine three-qubit entanglement
- Purcell-Enhanced Single-Photon Emission in the Telecom C-Band
- Frequency-encoded linear cluster states with coherent Raman photons
- Protocol for generating multi-photon entangled states from quantum dots in the presence of nuclear spin fluctuations
Cited by in corpus (8)
- Electrically-triggered spin-photon devices in silicon
- Purcell enhanced and tunable single-photon emission at telecom wavelengths from InAs quantum dots in circular photonic crystal resonators
- Initialization of Neutral and Charged Exciton Spin States in a Telecom-Emitting Quantum Dot
- Stark Tuning and Charge State Control in Individual Telecom C-Band Quantum Dots
- Kilometer-Scale Ion-Photon Entanglement with a Metastable Sr Qubit
- Spin properties in droplet epitaxy-grown telecom quantum dots
- Spin-photon Qubits for Scalable Quantum Network
- Routing single photons with quantum emitters coupled to nanostructures