INTEGRATED MECHANICS FOR MODULAR QUANTUM RECONFIGURABLE CIRCUITS

Project Information

IMMQUIRE

Grant agreement ID: 896401

DOI

10.3030/896401

Project closed

EC signature date 24 February 2020

Start date 12 April 2021

End date 11 April 2024

Funded under

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Total cost

€ 246 669,37

EU contribution

€ 246 669,12

Coordinated by

TECHNISCHE UNIVERSITEIT DELFT
Netherlands

Periodic Reporting for period 2 - IMMQUIRE (INTEGRATED MECHANICS FOR MODULAR QUANTUM RECONFIGURABLE CIRCUITS)

Reporting period: 2023-04-12 to 2024-04-11

Summary of the context and overall objectives of the project

The aim of IMMQUIRE is to overcome the scaling limitations of quantum technologies by developing a modular on-chip platform equipped with mechanical reconfiguration to optically interconnect and control spin qubits. This system has the potential to generate qubit entanglement on an unprecedented scale and accelerate the development of quantum computers, cryptography, and a quantum internet.
Specific objectives are a) developing a mechanically reconfigurable PIC platform designed to b) strain-tune transferred diamond spin defects into spectral alignment, and c) reconfigure PICs for spin interaction and quantum logic.

At the conclusion of the project, we have shown large-scale integrated photonics and electronics for spin-optic based quantum information processing. This includes the demonstration of scalable waveguide- and cavity-coupled silicon color centers/spin defects, the integration of superconducting single-photon detectors, and diamond color center quantum systems on chip with more than 1000 qubits. These bring forward to generating large entangled states on chip for quantum computation and communication.

Work performed from the beginning of the project to the end of the period covered by the report and main results achieved so far

We have demonstrated integration approaches for spin-photon interfaces into photonic integrated circuits and microelectronic chips. This includes a system integrating record-high (1024) number of controllable spin-optic interfaces, and spin control of a diamond color center on a nanophotonic chip. We have also developed a method to integrate superconducting single-photon detectors onto arbitrary photonic platforms, including mechanically-reconfigurable platforms.
We also started investigating a new type of color center in silicon with telecommunication wavelength operation, and demonstrated waveguide and cavity integration. Using the new silicon color centers, we demonstrated optical tuning of their operation wavelength.

Progress beyond the state of the art and expected potential impact (including the socio-economic impact and the wider societal implications of the project so far)

We have developed large-scale integrated photonics and electronics for spin-optic based quantum information processing. In addition, we have demonstrated the first waveguide- and cavity-coupled silicon color centers and their spectral tunability, key for quantum information processing. To complete the system, we demonstrated the integration of superconducting single-photon detectors into arbitrary photonic substrates, enabling processing-free high-quality detectors for quantum applications. These demonstrations brings us a step forward to generating qubit entanglement on a large scale for quantum computation and communication.

A silicon color center coupled into a waveguide as a spin-photon interface