Quantum sensors are advancing rapidly, now capable of detecting tiny magnetic fields in laboratory settings. Some military applications are leveraging these advancements for navigation or underground mapping. However, the claims surrounding the quantum magnetometry Ghost Murmur, which allegedly located a human by their heartbeat from tens of kilometers away, deeply divide the scientific community.
A pilot found in the Iranian desert
On April 5, 2026, an American aviator became stranded in a mountain crevasse in southern Iran after losing his aircraft. According to multiple sources cited by the American press, the CIA reportedly deployed a classified device called Ghost Murmur to locate him. This device is based on long-range quantum magnetometry and is said to be capable of capturing the electromagnetic signature of a human heartbeat from several tens of kilometers away.
In practice, the system would utilize sensors made from synthetic diamonds containing microscopic flaws known as nitrogen-vacancy centers (NV centers). These flaws, illuminated by a laser and exposed to microwave pulses, act as quantum probes sensitive to the weakest magnetic fields. An artificial intelligence software would then isolate the cardiac signal from background noise. Physicists, as reported by Scientific American, greet these claims with deep skepticism.
A heartbeat signal deteriorating within a few centimeters
The primary obstacle lies in the physics of the magnetic field produced by the heart. John Wikswo, a professor of biomedical physics at Vanderbilt University, points out that this signal is barely measurable at 10 centimeters from the chest. At a meter, it drops by a factor of a thousand. At a kilometer, it would represent only a billionth of its initial value. In other words, detecting a heartbeat at 60 kilometers would be akin to hearing a whisper in a thousand square kilometers stadium, according to The Quantum Insider.
Additionally, the sensor would need to distinguish the human heart from those of sheep, dogs, and other animals in the area. It would also have to filter out the Earth’s magnetic field and natural or artificial electromagnetic interferences. Chad Orzel, a physics professor at Union College in New York, believes that even artificial intelligence couldn’t extract such an infinitely weak signal. Bradley Roth, a physicist at Oakland University, adds that a device like this mounted on a helicopter would not just be an improvement, but a truly revolutionary advancement compared to current knowledge.
Between misinformation and genuine technological breakthrough
In reality, the rescue likely relied on conventional means, including multiple aircraft and a survival beacon carried by the pilot. Quantum magnetometry does exist and is progressing quickly. Several companies like SBQuantum in Canada or Qnami in Switzerland are developing diamond-based sensors for underground mapping or GPS-free navigation. However, no system known to date operates within the range described by the CIA’s sources.
Physicists interviewed by Scientific American agree on one thing. The capabilities attributed to Ghost Murmur contradict decades of peer-reviewed research on the propagation of magnetic fields. Chad Orzel even suggests that someone may have misled a journalist. Nevertheless, this episode illustrates just how much quantum sensors fascinate military and industrial sectors, and how blurry the line between real capabilities and strategic communication remains in this emerging field.
