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is to resolve an issue encountered with many modern navigation devices – their dependence on GPS.
The idea of combining MEMS(1) gyros with GNSS(2) receivers involved the use of external measurements from the GNSS with a goal of limiting error accummulation in the MEMS gyros' data. However, GNSS availability is limited indoors, under water/ground, and in the areas with high concentration of tall buildings. Additionally, devices capable of introducing errors into GNSS signals are now widly used in many states. The proposed quantum gyro can help address this issue, as its Bias Drift is almost zero, which reduces its reliance on external measurements.
(1) MEMS - Micro-Electro-Mechanical Systems; (2) GNSS - Global Navigation Satellite System.
this tecnology has a potential to significantly impact:
our goal is the development of a solid-state, compact, diamond-based gyro competing with best MEMS devices in terms of their sensitivity and significantly surpassing those with respect to bias stability.
A diamond sample hosting nitrogen-vacancy (NV) color centers – the most common color centers in diamond - will be used as the rotation-sensing element. Artificial diamonds allow for precisely controlled concentration of the NV-centers, offering significant flexibility in sensor systems design and development.
is based on the so-called “spin” – inherent, ever-present rotation of elementary particles. Much like a fast-rotating top, elementary particles – electrons and nucleons – preserve their orientation in space even when affixed to a moving platform, thus acting like natural gyros. The NV-centers exhibit two intrinsic spins – electronic and nuclear (schematically shown on the left) - both of which can be used in rotation sensor design.
possesses unique and useful properties. The electron spin of an NV-center is readily accessible. Its state can be relatively easily prepared and read out by its own florescence, as illustrated in the picture on the right. The nuclear spin is somewhat hidden and difficult to access. Although both spins are sensitive to rotation, the nuclear spin is more stable due to its weaker interaction with the external factors. As a result, despite of its reduced accessibility, nuclear spin proves a better candidate to serve as the main sensing element of a rotation sensor.
the nuclear spin is light-insensitive, and it has longer coherence time, allowing for signal accumulation over longer time spans. These properties make nuclear spin more difficult to manage. Fortunately, nuclear spin can be effectively manipulated via its interaction with its electronic counterpart. Being located in close proximity to each other - inside the same NV-center - the two spins strongly interact. This gives one an opportunity, with help of a radio-frequency pulse, to map a prepared electronic spin state onto that of the nuclear spin (see the picture on the right), and, conversely, to map a nuclear spin state onto that of the electronic spin. The latter can then be easily read out by measuring the frequency of electron florescence.
Since it is possible to independently work with the electron and nuclear spins, one can measure any number of extraneous factors such as magnetic field, temperature and pressure and use results to compensate useful sensor signal, thus yielding self-contained, self-locked sensor build on a single diamond substrate.
A teamof young, telented researchers is led by PhD/Professorship-level Advisors.
is carried out employing experimental and testing facilities hosted by major Scientific Institutions in the United States and Russia.
include development of a working prototype of quantum gyro that meets the accuracy level of best MEMS devices, and demonstration of applicability of the technology to other measurement tasks. Underway is the developing of a compact quantum navigational device for marine applications.
We are looking for partners in all aspects of further research and development, including improvement of sensor performance, finding new application areas, marketing and investment.