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Unlocking the Power of Quantum: A Journey into Quantum Accelerometers


Quantum computing has long been hailed as the future of technology, promising exponential computational power that could revolutionize various industries. While quantum computers are still in their infancy, researchers have already started exploring the potential of quantum-enabled devices. One such groundbreaking innovation is the quantum accelerometer, which harnesses the principles of quantum mechanics to unlock unprecedented levels of sensitivity and precision in acceleration measurements. In this article, we’ll dive into the fascinating world of quantum accelerometers and explore their applications, benefits, and the challenges they present.


Understanding Quantum Accelerometers

Accelerometers are devices that measure the acceleration of a moving object. They are used in a wide variety of applications, including navigation, timing, and vibration monitoring. Traditional accelerometers use mechanical sensors to measure acceleration. However, quantum accelerometers use quantum sensors to achieve higher levels of precision and accuracy.

Traditional accelerometers, commonly used in applications such as navigation systems, robotics, and aerospace, rely on classical physics principles. They measure acceleration based on the displacement of mass or changes in capacitance. In contrast, quantum accelerometers utilize the properties of quantum systems, such as superposition and entanglement, to achieve enhanced performance.

Quantum accelerometers leverage the sensitivity of quantum sensors to detect extremely small changes in acceleration. By encoding acceleration information into quantum states and manipulating them through quantum algorithms, these accelerometers can provide more accurate and precise measurements compared to their classical counterparts.

Here are some of the key benefits of quantum accelerometers:

  • Ultra-high precision: Quantum accelerometers can measure acceleration with unprecedented levels of precision. This makes them ideal for use in applications where accurate measurements are essential, such as navigation and timing.
  • Robustness to environmental noise: Quantum accelerometers are more robust to environmental noise than traditional accelerometers. This makes them more reliable in harsh environments, such as high-vibration environments.
  • Small size and weight: Quantum accelerometers are much smaller and lighter than traditional accelerometers. This makes them easier to integrate into small devices, such as drones and smartphones.
  • Software-configurable: Quantum accelerometers can be software-configured to optimize their performance for different applications. This makes them a versatile tool that can be used in a wide range of applications.

For in-depth understanding of Quantum Accelerometer   technology and applications please visit: Quantum Accelerometers: Pioneering the Future of Motion Sensing


The advent of quantum accelerometers opens up a wide range of possibilities in numerous fields. One of the most promising applications of quantum accelerometers is in the development of satellite-free navigation systems. Satellite-based navigation systems, such as GPS, are susceptible to interference from environmental factors such as solar flares and jamming. Quantum accelerometers could be used to create navigation systems that are not affected by these factors.

Navigation and Positioning: Quantum accelerometers can enhance navigation systems by providing more accurate and reliable motion sensing. This is particularly valuable in autonomous vehicles, where precise positioning and motion tracking are essential.

Aerospace and Aviation: Quantum accelerometers can improve the performance of aircraft and spacecraft by precisely measuring acceleration and enabling better control systems. This can enhance safety, fuel efficiency, and overall performance.

Fundamental Physics Research: Quantum accelerometers have the potential to contribute to fundamental research in areas like gravitational wave detection, quantum gravity, and cosmology. They could provide new insights into the nature of the universe and advance our understanding of physics.

Challenges and Future Outlook

While quantum accelerometers hold tremendous promise, several challenges need to be addressed for their widespread adoption:

Technical Complexity: Developing quantum accelerometers requires expertise in quantum mechanics, quantum algorithms, and sensor technology. It demands interdisciplinary collaboration and cutting-edge infrastructure.

Noise and Interference: Quantum sensors are susceptible to environmental noise and interference, which can affect their performance. Researchers are actively working on mitigating these issues through advanced noise-cancellation techniques and isolation methods.

Scalability and Cost: As with any emerging technology, scalability and cost are critical factors in determining the practicality of quantum accelerometers. Achieving scalability while keeping costs manageable is an ongoing challenge that researchers and engineers are tackling.

The future of quantum accelerometers looks promising. As quantum computing technologies advance, we can expect significant improvements in their performance, scalability, and accessibility. With ongoing research and development, these accelerometers may become integral components in a wide range of applications, revolutionizing industries and enabling unprecedented advancements.

The UK’s first commercially viable quantum accelerometer, which could be used for navigation was demonstrated by a team from Imperial College London and M Squared in 2018.

The quantum accelerometer relies on the precision and accuracy possible by measuring properties of supercool atoms. At extremely low temperatures, the atoms behave in a ‘quantum’ way, acting like both matter and waves. It was inspired by the discovery that lasers can trap and cool a cloud of atoms placed in a vacuum to a fraction of a degree above absolute zero.


Once chilled, the atoms achieve a quantum state that is easily perturbed by an outside force – and another laser beam can then be used to track them.  As the atoms fall, their wave properties are affected by the acceleration of the vehicle. Using an ‘optical ruler’, the accelerometer is able to measure these minute changes very accurately. To make the atoms cold enough, and to probe their properties as they respond to acceleration, very powerful lasers that can be precisely controlled are needed.


Dr. Joseph Thom, Quantum Technology Scientist at M Squared, said: “As part of our work in commercialising cold atom quantum sensors, we developed a universal laser system for cold atom-based sensors that we have already implemented in our quantum gravimeter. This laser is now also used in the quantum accelerometer we have built in collaboration with Imperial. Combining high power, exceptionally low noise and frequency tunability, the laser system cools the atoms and provides the optical ruler for the acceleration measurements.”

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The current system is designed for navigation of large vehicles, such as ships and even trains. However, the principle can also be used for fundamental science research, such as in the search for dark energy and gravitational waves, which the Imperial team are also working on. Professor Ed Hinds, from the Centre for Cold Matter at Imperial, said: “I think it’s tremendously exciting that this quantum technology is now moving out of the basic science lab and being applied to problems in the wider world, all from the fantastic sensitivity and reliability that you can only get from these quantum systems.”


Dr. Graeme Malcolm, founder and CEO of M Squared, said: “This commercially viable quantum device, the accelerometer, will put the UK at the heart of the coming quantum age. The collaborative efforts to realise the potential of quantum navigation illustrate Britain’s unique strength in bringing together industry and academia – building on advancements at the frontier of science, out of the laboratory to create real-world applications for the betterment of society.”


A quantum accelerometer uses atom interferometry to measure accelerations along a horizontal axis. Quantum accelerometers are able to achieve a combination of sensitivity and stability by exploiting quantum interference. As such, they will be critical components of a quantum inertial navigation unit, which will offer satellite-free navigation with unparalleled long-term accuracy. A phase locked SolsTiS system underpins this setup and provides the extremely low phase noise required to make high sensitivity measurements and dynamic frequency tunability to address multiple atomic transitions.

Commercially Available Quantum Accelerometers

There are a few companies that are currently developing and commercializing quantum accelerometers. These companies include:

  • M Squared Lasers: M Squared Lasers is a UK-based company that has developed a commercial quantum accelerometer called the M2-QAC. The M2-QAC is a 3D quantum accelerometer that uses atom interferometry to measure acceleration. It has a precision of 1 x 10^-7 m/s^2 and a bandwidth of 3 Hz.
  • M2-QAC quantum accelerometer by M Squared Lasers
  • Spinquest: Spinquest is a US-based company that is developing a commercial quantum accelerometer called the SQUID-Based Quantum Accelerometer (SQBQA). The SQBQA is a 1D quantum accelerometer that uses superconducting quantum interference devices (SQUIDs) to measure acceleration. It has a precision of 1 x 10^-10 m/s^2 and a bandwidth of 100 Hz.
  • Q-CTRL: Q-CTRL is an Australian-based company that is developing a commercial quantum accelerometer called the Quantum Engineering Sensing Platform (QESP). The QESP is a 3D quantum accelerometer that uses a variety of quantum sensors to measure acceleration. It has a precision of 1 x 10^-12 m/s^2 and a bandwidth of 1 kHz.

These are just a few of the companies that are developing and commercializing quantum accelerometers. As the technology continues to mature, we can expect to see more companies entering this market and offering a wider range of products.

Infleqtion unveils the future of resilient navigation

Infleqtion has announced breakthrough progress in advancing the field of quantum navigation by a University Colorado team in work supported by Infleqtion and the National Science Foundation. The team demonstrated the world’s first software-configured, quantum-enabled high-performance accelerometer by combining machine learning with quantum sensing. It is designed for Positioning, Navigation, and Timing (PNT) applications that operate under accelerations up to several tens of times the Earth’s gravity (g).

The accelerometer demonstrated a sensor volume reduction of greater than a factor of 10,000 times compared to the current state-of-the-art technology. It also withstands unwanted vibrations by a factor of 10-100 times greater than traditional atom-based sensors. This achievement demonstrates how atom interferometry’s exceptional precision can be applied in practical, real-world environments.

These results highlight the future of quantum sensing as a high-precision alternative to satellite-based GPS signals, addressing vulnerabilities associated with GPS denial or spoofing tactics employed by adversaries. This breakthrough enables optimal adaptability to mission requirements and opens new possibilities for precision in real-world GPS-denied environments.


Quantum accelerometers represent a remarkable fusion of quantum mechanics and sensor technology, offering unparalleled precision and sensitivity in acceleration measurements. Their potential impact spans across multiple industries, from navigation and aerospace to fundamental physics research. While challenges persist, researchers and engineers are diligently working to overcome them, paving the way for a future where quantum accelerometers become a standard tool in various applications.

As we continue to unlock the mysteries of quantum computing, the transformative power of quantum accelerometers holds the promise of reshaping the way we measure and understand motion. The journey into the world of quantum accelerometers has just begun, and we can’t wait

About Rajesh Uppal

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