Educational kit based on solid-state spin qubits in diamond for quantum technology

Part of the student’s

Comprehensive lab


spinEDU is a unique educational kit suitable for both undergraduate and graduate students who train in the field of quantum science and technology. This kit was developed by the Technion – Israel Institute of Technology and is part of the student’s coursework. The kit allows students to explore and characterize Qubits at room temperature. The lab experiments expose the students to the “cutting edge” of modern research in quantum technology, such as quantum computing, qubit manipulation, and quantum sensing. The experimental system enables you to setup, control, and read out the quantum data in solid-state spin qubits. It uses a known color center in diamonds called the NV center.

Figure: (a) A schematic representation of the diamond lattice with the N (red) and vacancy (light blue). (b) The principal axes of an NV are defined with z-axis parallel to the N-V axis, and x-axis in a plane that consists of the N, V and one of the nearest carbons.

Lab setup

This Lab setup is built from three sub-systems.

Microwave (MW) system:
Pulsed MW  bridge operating at the 2-4 GHz range with 30 W peak power.  The bridge supports arbitrary waveform generating schemes.

Data acquisition system and software:
Sophisticated data acquiring computer and very user-friendly operating software for executing a variety of complex experiments, including scripting to change pulse sequence parameters on the fly.

Optical system:
Included a pulsed laser diode for pumping the spins to the |0> state and reading out the ODMR signal.

spinEDU lab setup include a [1 1 1] diamond with ~1017 NV¯ /cm³.  Contact us for the optional use of an optical- or electronic- grade diamond for single NV¯ experiments.

Lab activities

The kit contains a full and comprehensive manual explaining the theory of the experiments and lays down the details of the workflow. The coursework is currently divided into the following six labs, although additional types of experiments, such as two-qubit Deutsch–Jozsa algorithm, and quantum sensing of AC magnetic fields, can be added at will. Here is some of the activities of each lab:

Familiarize the students with the physical system (NVs in diamond), the experimental setup, and the acquisition software.

Perform MW frequency swept ODMR measurements at various magnetic fields and find the NV’s resonance frequency.

Observing and measuring Rabi oscillations both as a function of MW pulse length, and as a function of MW pulse amplitude.

Measuring the relaxation times (T1, T2, T2*) of the NV centers in the diamond sample used in this setup.

Experiment with various dynamic decoupling sequences, such as Carr-Purcell-Meiboom-Gill, XY8 and measuring the coherence times in these sequences.

Perform single qubit operation (rotations in Bloch sphere) and measure the fidelity of gates using quantum state tomography.

spinEDU scientific background

The purpose of the lab is to enable undergraduate and graduate students to get first-hand knowledge and experience working with systems of solid-state qubits. The lab also enables students to apply the most advanced methodologies of qubit quantum control and sensing by means of advanced microwave pulse sequences. The experiment system enables you to setup, control, and read out the quantum data in solid-state spin qubits. It uses a known color center in diamonds called the NV center. The NV center (NV¯) is a defect in diamonds made of a substitutional nitrogen atom and an adjacent lattice vacancy site (see figure). The NV¯ has two unpaired electrons that are used as qubits. Owing to its energy level structure, it exhibits spin-dependent photoluminescence, making it suitable for optically detected magnetic resonance (ODMR). NV¯ centers in diamonds are used in contemporary basic and applied research as potential building blocks of a quantum computer as well as quantum sensor.