Optimisation of diamond quantum processors

@article{Chen2020OptimisationOD,
  title={Optimisation of diamond quantum processors},
  author={YunHeng Chen and Sophie Stearn and Scott Vella and Andrew Horsley and Marcus W. Doherty},
  journal={arXiv: Quantum Physics},
  year={2020}
}
Diamond quantum processors consisting of a nitrogen-vacancy (NV) centre and surrounding nuclear spins have been the key to significant advancements in room-temperature quantum computing, quantum sensing and microscopy. The optimisation of these processors is crucial for the development of large-scale diamond quantum computers and the next generation of enhanced quantum sensors and microscopes. Here, we present a full model of multi-qubit diamond quantum processors and develop a semi-analytical… 
5 Citations
Introduction to quantum optimal control for quantum sensing with nitrogen-vacancy centers in diamond
Diamond based quantum technology is a fast emerging field with both scientific and technological importance. With the growing knowledge and experience concerning diamond based quantum systems, comes
Anisotropic electron-nuclear interactions in a rotating quantum spin bath
A. A. Wood, ∗ R. M. Goldblatt, R. P. Anderson, L. C. L. Hollenberg, 3 R. E. Scholten, and A. M. Martin School of Physics, University of Melbourne, Parkville Victoria 3010, Australia La Trobe
Room-temperature control and electrical readout of individual nitrogen-vacancy nuclear spins
TLDR
This demonstration is a step towards diamond quantum devices with a readout area limited by inter-electrode distance rather than by the diffraction limit, which could enable the development of electronic quantum processors based on the dipolar interaction of spin-qubits placed at nanoscopic proximity.

References

SHOWING 1-10 OF 68 REFERENCES
Experimental fault-tolerant universal quantum gates with solid-state spins under ambient conditions
TLDR
The source of noise during quantum gate operation is characterized and strategies to suppress the effect of these are demonstrated to achieve high control fidelities in a universal set of logic gates in a nitrogen-vacancy centre in diamond.
Universal control and error correction in multi-qubit spin registers in diamond.
TLDR
This work uses the electron spin of a nitrogen-vacancy centre in diamond to selectively initialize, control and read out carbon-13 spins in the surrounding spin bath and construct high-fidelity single- and two-qubit gates.
Spin coherent quantum transport of electrons between defects in diamond
Abstract The nitrogen-vacancy (NV) color center in diamond has rapidly emerged as an important solid-state system for quantum information processing. Whereas individual spin registers have been used
Room-temperature high-speed nuclear-spin quantum memory in diamond
Quantum memories provide intermediate storage of quantum information until it is needed for the next step of a quantum algorithm or a quantum communication process. Relevant figures of merit are
Scalable architecture for a room temperature solid-state quantum information processor.
TLDR
This work proposes and analyses an architecture for a scalable, solid-state quantum information processor capable of operating at room temperature that alleviates the stringent constraints currently limiting the realization of scalable quantum processors and will provide fundamental insights into the physics of non-equilibrium many-body quantum systems.
Quantum error correction in a solid-state hybrid spin register
TLDR
It is demonstrated that joint initialization, projective readout and fast local and non-local gate operations can all be achieved in diamond spin systems, even under ambient conditions, paving the way to large-scale quantum computation.
Room-Temperature Quantum Bit Memory Exceeding One Second
TLDR
High-fidelity control of a solid-state qubit is demonstrated, which preserves its polarization for several minutes and features coherence lifetimes exceeding 1 second at room temperature, and may allow for new applications in quantum information science.
High-fidelity spin entanglement using optimal control.
TLDR
Optimal control of a prototype spin qubit system consisting of two proximal nitrogen-vacancy centres in diamond is experimentally demonstrated, and nuclear spin entanglement over a length scale of 25 nm is demonstrated.
Protecting a Diamond Quantum Memory by Charge State Control.
TLDR
This work identifies and characterize the positively charged NV center as an electron-spin-less and optically inactive state by utilizing the nuclear spin qubit as a probe and achieves a lengthening of the nuclearspin coherence times by a factor of 4.
Noise-resilient quantum evolution steered by dynamical decoupling
TLDR
This work designs and implements a self-protected controlled-NOT gate on the electron spin of a nitrogen-vacancy centre and a nearby carbon-13 nuclear spin in diamond at room temperature by employing an engineered dynamical decoupling control on the electrons.
...
1
2
3
4
5
...