Silicon T centre hyperfine structure and memory protection schemes
arXiv:2512.16047 · doi:10.1103/m23d-b4vg
Abstract
Combining the long-coherence of spin qubits and the capability to transmit information and entanglement through photons, spin-photon interfaces (SPIs) are a promising platform for networked quantum computation and long-distance quantum communication. SPIs that possess local `memory' qubits in addition to the optically coupled `communication' qubit can improve remote entanglement fidelities through brokered entanglement schemes and entanglement purification. In these schemes, it is critical to protect the memory qubit from decoherence during entanglement operations on the communications qubit. Silicon, a platform with mature microelectronic and nanophotonic fabrication, is host to the T centre, an SPI with emission in the telecommunications O-band that directly integrates with silicon nanophotonics. Cavity-coupled T centres are a platform for brokered entanglement distribution in silicon photonic circuits and over long-distance optical fibre links. The T centre's electron and nuclear spin qubits are an intrinsic register of communication and memory qubits respectively, with anisotropic hyperfine coupling. In this work we determine the T centre's hydrogen hyperfine coupling tensor. We also introduce schemes to protect against dephasing or eliminate relaxation of the T centre's hydrogen memory qubit during optical excitation. These results address a key challenge for practical T centre quantum networks.
8 pages, 5 figures
References in corpus (38)
- Large Scale Modular Quantum Computer Architecture with Atomic Memory and Photonic Interconnects
- Realization of a multi-node quantum network of remote solid-state qubits
- Efficient high-fidelity quantum computation using matter qubits and linear optics
- Quantum error correction in a solid-state hybrid spin register
- Deterministic delivery of remote entanglement on a quantum network
- A 10-qubit solid-state spin register with quantum memory up to one minute
- Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
- Fault-tolerant quantum repeaters with minimal physical resources, and implementations based on single photon emitters
- Room-temperature optically detected magnetic resonance of single defects in hexagonal boron nitride
- Fault-tolerant operation of a logical qubit in a diamond quantum processor
- Ultrafast optical control of entanglement between two quantum dot spins
- Entanglement of trapped-ion qubits separated by 230 meters
- Robust multi-qubit quantum network node with integrated error detection
- Optical addressing of an individual erbium ion in silicon
- Optical polarization of nuclear spins in silicon carbide
- A silicon-integrated telecom photon-spin interface
- Brokered Graph State Quantum Computing
- Robust quantum-network memory using decoherence-protected subspaces of nuclear spins
- Prospects for measurement-based quantum computing with solid state spins
- Robust Quantum Memory in a Trapped-Ion Quantum Network Node
- Dephasing mechanisms of diamond-based nuclear-spin memories for quantum networks
- Purcell enhancement of single-photon emitters in silicon
- Coherence of an optically illuminated single nuclear spin qubit
- Cavity-coupled telecom atomic source in silicon
- Mapping a 50-spin-qubit network through correlated sensing
- Verifiable blind quantum computing with trapped ions and single photons
- Cavity enhanced emission from a silicon T center
- High Resolution Optical Spectroscopy and Magnetic Properties of Yb3+ in Y2SiO5
- Waveguide-integrated silicon T centres
- High-efficiency single photon emission from a silicon T-center in a nanobeam
- Multidimensional cluster states using a single spin-photon interface coupled strongly to an intrinsic nuclear register
- Effect of Localization on Photoluminescence and Zero-Field Splitting of Silicon Color Centers
- Probing the dynamics of a nuclear spin bath in diamond through time-resolved central spin magnetometry
- Theory of nuclear spin dephasing and relaxation by optically illuminated nitrogen-vancy center
- Electrically-triggered spin-photon devices in silicon
- Efficient Microwave Spin Control of Negatively Charged Group-IV Color Centers in Diamond
- Entanglement of a nuclear spin qubit register in silicon photonics
- Laser-induced spectral diffusion and excited-state mixing of silicon T centres