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Quantum ‘compass’ technology aids in navigation without use of GPS satellites

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Scientists from Imperial College London and M Squared, a photonics and quantum technology company, have created a portable quantum accelerometer which enables location tracking without the aid of GPS satellites. As demonstrated at the National Quantum Technologies Showcase 2018 in London, the device utilizes ultra-cooled atoms and lasers to measure position with precision made possible by quantum mechanics. The system is currently designed to be used for navigating large vehicles such as ships and trains, but smaller-scale devices will be available as the technology develops.

Quantum accelerator in the lab. | Credit: Imperial College London

The reliance on global navigation satellite systems such as GPS has a few significant shortcomings that the quantum accelerometer would overcome. Satellite signals can be blocked or jammed, interfering with the systems that rely on the data being provided. Threats such as electromagnetic pulse (EMP) attacks on a massive scale, now closer to reality with nuclear capability developments around the world, would cripple any technology relying on satellite systems.

The financial burden of GPS failure is also a serious consideration driving the innovation behind this device. In M Squared’s press release announcement, it was estimated that each day without GPS services in the United Kingdom would cost the country 1 billion pounds. Since it’s a self-contained system not reliant on external signals, a quantum accelerometer would not be at risk for these types of security or financial fallouts.

A close up of the quantum accelerator. | Credit: Imperial College London

Even without the consideration of electronic attacks and satellite failures, a much smaller version of this technology could overcome day-to-day problems with regular GPS use. Anyone who has ever used a map application in a city environment has likely experienced blockages from the buildings disrupting satellite signals. A quantum accelerator would calculate its position based on its high precision velocity measurements rather than GPS information, thus eliminating never-ending “recalculating” type errors that current mapping devices are prone to receive.

General accelerometers are already found in common devices like cell phones and video game controllers. Overall, they function by calculating changes in the velocity of an object (phone, controller, etc.) and that data is used for whatever its intended purpose. For location-driven applications, however, the measured position loses accuracy without feedback from external sources such as GPS. For example, after a few street turns (or less), a mapping application would need to confer with a satellite to recalculate the new position of the car in motion. The high precision of a quantum accelerometer does not have this limitation, thus eliminating the need for a GPS signal.

When atoms are cooled to ultra-cold levels, their quantum behavior emerges and can then be measured by a laser beam acting as a ruler. The team behind the quantum accelerometer device had already been developing other commercial quantum technologies prior to the current one, so when the need for arose for measuring and cooling atoms, a solution was already in place via the team’s universal laser system developed for gravity measurements. This laser both cools and measures the atoms involved in the accelerometer’s device’s movement calculations.

This quantum device is representative of the transition of quantum mechanics from the science laboratory to real-world applications. Besides navigational solutions, Professor Ed Hinds, Director of the Centre for Cold Matter at Imperial College London, described gravity measurements, mapping gravitational forces to look for minerals, and looking inside vehicles to diagnose problems as a few suggestions for other applications. “[The potential applications] …all come from the fantastic sensitivity and reliability that you can only get from these quantum systems.”

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Watch the video below to see the quantum team tell more about the device.

Accidental computer geek, fascinated by most history and the multiplanetary future on its way. Quite keen on the democratization of space. | It's pronounced day-sha, but I answer to almost any variation thereof.

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Elon Musk

“Take Back Tesla:” Unions and corporate watchdogs launch campaign against Musk’s 2025 pay package

A new shareholder campaign is calling for Tesla investors to vote against Elon Musk’s proposed 2025 CEO Performance Award.

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Wcamp9, CC BY 4.0 , via Wikimedia Commons

A new shareholder campaign is calling for Tesla investors to vote against Elon Musk’s proposed 2025 CEO Performance Award, arguing it would deepen governance risks and weaken corporate accountability.

Ahead of Tesla’s Q3 2025 earnings report, a coalition of unions and watchdogs launched the “Take Back Tesla” initiative, urging investors to reject Musk’s pay proposal at next month’s annual meeting. The plan would grant the CEO additional shares worth nearly $1 trillion over ten years, expanding his ownership stake in the company to about 25%.

Unions and watchdogs argue that Elon Musk’s proposed plan rewards distraction

The Take Back Tesla campaign is backed by groups such as the American Federation of Teachers, Public Citizen, Americans for Financial Reform, Ekō, People’s Action, and Stop the Money Pipeline. 

As could be seen on the campaign’s website, the groups are arguing that Musk’s focus on political ventures and external businesses has distracted him from leading Tesla. The group’s website called Musk’s new CEO Performance Award “outrageous” as it involves an amount of wealth that is unreachable even by today’s top executives.

“In order to unlock the full amount of shares proposed in this compensation plan, Tesla’s value would need to increase dramatically to $8.5 trillion. As Tesla’s proxy statement points out, that would make Tesla roughly 2x as valuable as the most valuable company in the world (Nvidia) today. Arguably, growing Tesla’s value to double the value of Nvidia would justify paying Musk something like double the compensation of Nvidia’s CEO. 

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“But the annual value of Musk’s trillion dollar pay package isn’t just 2 times what Nvidia’s CEO made last year (just under $50 million); it’s more than 2,000 times what Nvidia’s CEO made last year. At his current compensation of $49.9 million, it would take Nvidia’s CEO over 2,000 years to earn the amount that Elon Musk could earn, on average, per year for the next ten years,” the group argued.

Board defends package as necessary, though some pushback is present

Tesla’s board insists the compensation plan is essential to retain Musk and sustain the company’s innovation in AI, robotics, and self-driving technology. The automaker noted that previous skepticism from proxy firms such as ISS and Glass Lewis preceded a 20x rise in Tesla’s market capitalization since 2018, a feat that seemed unrealistic when it was proposed.

As noted in a CNBC report, New York City Comptroller Brad Lander, who oversees a $300 billion pension fund, stated that while Tesla has been a great investment, he “vociferously opposes” Elon Musk’s proposed 2025 CEO Performance Award. 

“Most of the time we’ve held Tesla stock, it has been a solid investment, it’s grown over time, and that’s why we haven’t chosen to dump it, he said, adding that he views Tesla’s Board as “insufficiently independent” since they have allowed Musk to be “absentee CEO.” Landers also argued that Tesla as a whole has failed to hit its targets when it comes to its Robotaxi program and its Full Self-Driving technology.

For context, Elon Musk has maintained that his 2025 CEO Performance Award is not designed for him to gather even more wealth. Instead, he stressed that it is required so that he could take a controlling stake in the company.

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Investor's Corner

Tesla Q3 2025 earnings: What analysts expect

The automaker delivered a record 497,099 vehicles and logged its highest-ever energy storage sales in Q3 2025. 

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Credit: Tesla China

Tesla’s (NASDAQ:TSLA) Q3 2025 earnings, which would be released after markets close today, could prove to be a test of confidence for the company’s shareholders. 

The automaker delivered a record 497,099 vehicles and logged its highest-ever energy storage sales, but analysts noted that these gains might have come at a cost. 

Record vehicle deliveries

Tesla’s profit per share is expected to fall about 25% year over year to around $0.53–$0.55, even as revenue rises from 4% to 6%, as noted in a report from Market Pulse. Analysts noted that Tesla’s record quarter was partly fueled by buyers rushing to complete purchases before the U.S. federal EV tax credit expired in September, a surge that could dampen Q4 demand. The company also dipped into its inventory to reach the record delivery number.

Analysts expect automotive gross margin (excluding regulatory credits) to land between a conservative 16.5% and 17%. This suggests that a good portion of Tesla’s Q3 delivery growth came from aggressive price cuts. If margins fall below 16.5%, it could hint at more cost pressures that the company would have to handle in the coming months.

Tesla’s Energy segment, meanwhile, is expected to act as a stabilizer. The business deployed 12.5 GWh of storage in Q3, driven by strong demand from AI data centers. Analysts expect this high-margin division to partially cushion the hit from the automaker’s thinner car profits.

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AI, FSD, and Musk’s role

Tesla’s lofty valuation, trading about 17% above the average analyst consensus of $365, would likely depend heavily on investor belief in its AI and robotics initiatives. Industry watchers have stated that management must deliver credible updates on Full Self-Driving and the Robotaxi program to help justify the company’s current valuation.

Elon Musk’s proposed 2025 CEO Performance Award, which proxy advisors have urged shareholders to reject, would likely be discussed in the Q3 2025 earnings call has well. Musk has hinted that a failed vote could jeopardize Tesla’s AI strategy, making the company’s upcoming results quite crucial for market confidence.

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Investor's Corner

Tesla Board Chair defends Elon Musk’s pay plan, slams proxy advisors

The letter comes ahead of Tesla’s 2025 Annual Meeting, where shareholders will vote on several key proposals.

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CeBIT Australia, CC BY 2.0 , via Wikimedia Commons

Tesla Chair Robyn Denholm has issued a strongly worded letter urging investors to reject the latest recommendations from proxy advisory firms ISS and Glass Lewis, saying their “one-size-fits-all” approach fails to recognize Tesla’s unique business model and track record. 

The letter comes ahead of Tesla’s 2025 Annual Meeting, where shareholders will vote on several key proposals including Elon Musk’s 2025 CEO Performance Award and director reelections.

Tesla slams proxy advisors’ models

Denholm criticized both firms for consistently opposing Tesla’s growth-oriented plans, noting that the company’s market capitalization has increased twentyfold since shareholders approved Musk’s 2018 performance package, which both advisors had opposed at the time. 

“Our shareholders have ignored their recommendations, and it’s a good thing they did,” she wrote. “Otherwise, you may have missed out on our market capitalization soaring 20x while the proxy advisors time and time again recommended “against” Tesla proposals designed to promote the sort of extraordinary growth we have enjoyed.”

The letter argued that Glass Lewis and ISS use robotic policies that don’t account for Tesla’s innovation-driven structure. Tesla’s leadership maintained that the 2025 CEO Performance Award will only reward Musk if he achieves extraordinary market capitalization and operational goals. The plan, Denholm stated, aligns Musk’s incentives with long-term shareholder interests.

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Tesla defends board leadership

Denholm also defended directors Ira Ehrenpreis and Kathleen Wilson-Thompson, calling them pivotal to Tesla’s governance and innovation strategy. She said both have driven Tesla’s growth and helped design compensation systems vital to competing in the AI and robotics talent race.

She warned that following ISS and Glass Lewis could turn Tesla into “just another car company,” and urged shareholders to “vote yes to robots, and reject robotic voting.” The letter also highlighted that neither ISS nor Glass Lewis owns Tesla stock, emphasizing that only shareholders “who have made an actual financial investment” should decide the company’s direction.

“If you prefer that Tesla turn into just another car company mired in the ways of the past, then you should follow ISS and Glass Lewis. If you believe that Tesla, under the visionary leadership of Elon and the oversight of a Board that includes business leaders with integrity like Ira, Kathleen and Joe, then you should vote with Tesla,” Denholm wrote.

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