Fidelity of photon-mediated entanglement between remote nuclear-spin multi-qubit registers

Abstract

The electron spin of a nitrogen-vacancy center in diamond lends itself to the control of proximal ${}^{13}$C nuclear spins via dynamical decoupling methods, possibly combined with radio-frequency driving. Long-lived single-qubit states and high-fidelity electron-nuclear gates required for the realization of a multiqubit register have already been demonstrated. Towards the goal of a scalable architecture, linking multiple such registers in a photonic network represents an important step. Multiple pairs of remotely entangled qubits can enable advanced algorithms or error correction protocols. We investigate how a photonic architecture can be extended from the intrinsic nitrogen spin to multiple ${}^{13}$C spins per node. Applying decoherence-protected gates sequentially, we simulate the fidelity of creating multiple pairs of remotely entangled qubits. Even though the currently achieved degree of control of ${}^{13}$C spins might not be sufficient for large-scale devices, the two schemes are compatible in principle. One requirement is the correction of unconditional phases acquired by unaddressed nuclear spins during a decoupling sequence.

arXiv comment10 pages, 6 figures

References in corpus (29)

• QuTiP 2: A Python framework for the dynamics of open quantum systems
• Heralded entanglement between solid-state qubits separated by 3 meters
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• High-fidelity projective readout of a solid-state spin quantum register
• 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
• Scalable quantum register based on coupled electron spins in a room temperature solid
• A 10-qubit solid-state spin register with quantum memory up to one minute
• Universal control and error correction in multi-qubit spin registers in diamond
• Decoherence-protected quantum gates for a hybrid solid-state spin register
• Entanglement Distillation between Solid-State Quantum Network Nodes
• Fidelity of quantum operations
• Detection and control of individual nuclear spins using a weakly coupled electron spin
• One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment
• Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
• Quantum networks based on color centers in diamond
• Sensing remote nuclear spins
• Quantum network nodes based on diamond qubits with an efficient nanophotonic interface
• Photonic architecture for scalable quantum information processing in NV-diamond
• Sensing distant nuclear spins with a single electron spin
• Robust multi-qubit quantum network node with integrated error detection
• An integrated nanophotonic quantum register based on silicon-vacancy spins in diamond
• Telecom networking with a diamond quantum memory
• Quantum multiplexing
• Precise control of entanglement in multinuclear spin registers coupled to defects
• Noise-resilient architecture of a hybrid electron-nuclear quantum register in diamond
• Performance of quantum registers in diamond in the presence of spin impurities
• Generation of genuine all-way entanglement in defect-nuclear spin systems through dynamical decoupling sequences

Cited by in corpus (4)

• Improved Electron-Nuclear Quantum Gates for Spin Sensing and Control
• High-Fidelity Entangling Gates for Electron and Nuclear Spin Qubits in Diamond
• Qubit-qudit entanglement transfer in defect centers with high-spin nuclei
• Suppression of coherent errors during entangling operations in NV centers in diamond