Casimir Inc Raised $12M on Quantum Vacuum Claims

A startup called Casimir Inc has raised $12 million on a promise that its microchip can harvest "unlimited power" from the quantum vacuum. The company's website does not hedge that claim. The founder, Harold White—a former NASA scientist—has said publicly that millions of devices will operate for years without a battery ever needing to be replaced or recharged.

That is a large promise. The physics involved is real. The gap between the two is where this story lives.

What the Casimir effect actually is

White's device is built around the Casimir effect, which is genuine and genuinely strange physics. Place two uncharged metal plates close together in a vacuum, and they attract each other. The mechanism isn't magnetism or residual charge—it's that the plates' presence changes the structure of the vacuum itself, creating a kind of underpressure in the gap between them. Measured in laboratories. Confirmed. Not in dispute.

White's reasoning proceeds from there: if the plates attract, energy is being released. Take that energy. Make it continuous by engineering a structure that causes electrons to preferentially tunnel into the gap, then siphon them off. In his words: "We have engineered a nanoscale structure that interacts with the quantum vacuum in such a way that it harvests continuous energy."

The argument has a certain internal momentum. Real effect. Force implies energy. Engineer the geometry. Extract the current. For investors without a physics background—and possibly for some with one—this chain of reasoning sounds plausible precisely because each link is real. The Casimir effect exists. Electron tunneling exists. Nanoscale engineering exists.

What makes this seductive to money is the same thing that makes it worth examining carefully: the vocabulary is all legitimate. White isn't invoking fictional phenomena. He's stacking real phenomena in a sequence that the underlying physics does not actually permit—and that distinction is exactly the kind of thing that looks like a detail but is in fact the entire question.

The ground state problem

Physicist Sabine Hossenfelder, who covered the announcement on her YouTube channel, identifies where the chain breaks. The space between the Casimir plates is vacuum. Specifically, it is the ground state—the lowest possible energy configuration the system can occupy. An electron that tunnels into that space has moved to a lower energy state. It does not then tunnel back out. It has, from a thermodynamic standpoint, nowhere lower to go.

"The space between the plates is vacuum. It's the ground state. It's the state of lowest possible energy," Hossenfelder explains. "If an electron tunnels into that place voluntarily with some probability, it will not voluntarily leave that place. Hence, no currents."

The Casimir attraction is also a one-time energy release, not a continuous source. You spend energy bringing the plates together; you recover some when they attract. The recovery never exceeds what you spent. This is not an engineering problem to be solved by better nanofabrication. It is a constraint imposed by the structure of the system itself.

What they measured, and what that means

Casimir Inc says their team did measure a current. White told The Debrief that "across these tests we observed device outputs ranging from millivolts to volts at picoamp current levels well above our instrumentation's noise floor."

Millivolts to volts does sound like something. The current is where the number becomes instructive. A picoamp is 10⁻¹² amps. Multiply voltage by current and you get, optimistically, around 10 picowatts. The company's own commercial target is 37 microwatts—the power budget for a modest wireless sensor node in active listening mode. To reach 37 microwatts from 10 picowatts, you need somewhere between one million and one billion stacked devices. (For context: some cutting-edge ultra-low-power chips in deep sleep can operate closer to single-digit microwatts, but any device doing active wireless communication pulls far more.)

The gap between the measured output and the stated commercial goal is not a scaling challenge. It is a physics verdict delivered in numbers.

There is also a more prosaic explanation for what was measured. Femtowatts to picowatts is precisely the range where contact potential differences between dissimilar materials, thermoelectric effects from tiny temperature gradients, and instrument offsets routinely appear. These are well-characterized phenomena. They produce real, measurable signals. They have nothing to do with vacuum energy—they are ordinary environmental gradients doing ordinary physics. You can extract a picowatt from a room-temperature gradient. You cannot extract a kilowatt from it. The energy available at that scale is bounded by the gradient itself, not by engineering ingenuity.

The paper that was cited

The company's press materials describe a paper by White published in Physical Review Research as "providing the theoretical foundation for why engineered Casimir cavities produce usable electrical energy." The paper is real. What it contains is apparently not what that description implies—Hossenfelder reviewed it when it appeared and concluded it has nothing to do with the Casimir effect or extracting energy from the vacuum. The citation does the rhetorical work of anchoring the claims to peer review without the paper actually supporting those claims.

The transcript does not specify whether the paper appeared in March of this year or a prior year, and the timing matters: a paper published well before this fundraising round was assembled raises different questions about its relationship to the current pitch than one commissioned alongside it. I have not been able to independently verify the publication date beyond "March," and readers evaluating the company's scientific credibility should want to know which March.

The investor question

The lead investor, quoted in coverage of the raise, offered this: "This is based on 100 years of science and we're finally approaching a commercial product."

Hossenfelder's response is precise: "He's right about the first part. It's based on 100 years of science, but that science says you can't do this."

That investor has not been named in any coverage I have seen—including The Debrief's reporting, which is the primary outlet covering the announcement. Whether this reflects an editorial choice by that specific publication or whether the investor's identity has not surfaced in any reporting is unclear, and those are meaningfully different situations. An unnamed investor in a $12 million raise on extraordinary scientific claims is its own data point about the information environment around this company.

What the Casimir effect is actually good for

Hossenfelder flags something worth sitting with: the genuinely interesting part of the Casimir effect is not the force, and not the pressure, but that the mathematics produces a negative energy term—something physicists will tell you shouldn't exist. What that means, and whether it points toward anything useful, is an open question. Serious theoretical work continues on what the quantum vacuum actually is and whether its structure can be engaged in ways current physics doesn't fully describe.

That uncertainty is real. It is not, however, a license for any particular company to treat "open question" as equivalent to "our device works." The distance between "physicists are still working out the implications of negative energy in Casimir geometries" and "our chip produces unlimited power" is the distance between a research frontier and a marketing claim.

Casimir Inc may believe its own argument. White may have convinced himself that the electron tunneling mechanism is sound. Twelve million dollars suggests someone found it convincing enough to write a check. The physics, as Hossenfelder lays it out, does not appear to agree.

What I keep returning to is that the Casimir effect—the real one, the laboratory-confirmed one—is already remarkable enough. Two uncharged plates attracting each other across vacuum because of geometry. That is strange and true. It does not need to be a perpetual motion machine to be worth knowing about.

---

Olivia Meng is Buzzrag's climate and environment correspondent.