Gravitational wave emission from quadrupole Josephson junction device
Victor Atanasov
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This is the closest published companion to the gaser, and it arrives from a different direction. Victor Atanasov proposes a device made of two superconducting Josephson junctions sharing a common ground point, fed a constant DC voltage from opposite ends. Each junction is a voltage-to-frequency converter, so the bias sets an oscillation frequency of about three times ten to the fifteen radians per second per volt. The symmetry of the arrangement makes the two electric dipole moments cancel, which suppresses the dominant electromagnetic radiation, and leaves a time-dependent mass quadrupole moment behind. That is the one thing a gravitational wave source needs. Because the mass carried by the superconducting condensate is tied to its charge by a very small coupling constant, the whole design rests on leverage: a tiny oscillating mass driven at an enormous frequency, with the emitted power scaling as the sixth power of that frequency. Atanasov also states the objection that would sink his own device, and says what would have to be true for it to survive.
Dlaczego ma tu znaczenieChapter 11 carries the gaser, a proposal to emit gravitational waves from dissimilar Josephson junctions. This paper is the independent published precedent for that idea: a different author, a different geometry, the same physical bet that a condensate driven at Josephson frequencies is the only laboratory object whose mass distribution moves fast enough to matter. It also supplies the honest counterpart, because the author writes the strongest argument against his own mechanism into the paper.
Co twierdzi
01The device is two superconducting tunnelling junctions sharing a common ground point, with a constant DC voltage applied at the opposing ends and no external electromagnetic field. Each junction converts that voltage into an alternating current whose angular frequency is twice the electron charge times the voltage divided by the reduced Planck constant, about 3.2 times ten to the fifteen radians per second for every volt applied.Figure 1 and the text around Equation 3
Designed, not yet built02The geometry does the work that makes gravitational emission thinkable at all. The symmetric arrangement gives the two sides equal and oppositely directed electric dipole moments, which cancel the electromagnetic dipole radiation in the far field, while the colliding trajectories leave a non-vanishing mass quadrupole moment, which is the quantity general relativity requires for gravitational wave emission.The text around Equations 4 and 5, on vanishing dipole and non-vanishing quadrupole
Designed, not yet built03In a condensed matter system the mass distribution is tied to the charge distribution by a coupling constant of the order of the electron mass divided by the elementary charge, about 5.6 times ten to the minus twelve kilograms per coulomb. The design is therefore explicitly a leverage argument: the mass that oscillates is minute, and the proposal is that the sixth power of the oscillation frequency makes up the difference.The text around Equation 1, on the mass-to-charge coupling constant
Designed, not yet built04The worked estimate is given with its inputs on the page. With the emitted power scaling as about four times ten to the minus fifty-three multiplied by the fourth power of the oscillation amplitude, the sixth power of the frequency and the condensate mass, an amplitude of order a micrometre, a condensate mass of order a nanogram and a one volt bias give roughly forty watts of gravitational wave emission, bounded above by the mean Josephson junction power, which for niobium-aluminium-oxide-niobium junctions of one square centimetre operating in liquid helium is of order a kilowatt.Equations 6 to 9 and the text between them
Designed, not yet built05The author states the objection that decides the device. The standard description of a junction held at constant potential by a battery gives constant and equal charge densities on both sides, and under that solution there is no mass oscillation and no emission. Atanasov argues that this standard solution holds only in special cases, that the junction dynamics are highly non-linear and the usual solutions approximate, and that the DC-mode result itself contains a contradiction pointing the other way. He writes the paper to invite the search for driving schemes hidden in that non-linear sector.The discussion following Equation 10, on the constant charge density solution and the conditions under which it holds
What to watch06The reverse of the effect is the part with an application. If curvature can act as a chemical potential across a junction and create a measurable voltage difference for the superconducting species, then the same device works as a detector, and two of them become an emitter and receiver pair for gravitational wave communication, with a one over distance fall-off rather than the inverse square of intensity.Abstract; closing discussion on curvature-to-voltage conversion
What to watch
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https://arxiv.org/abs/1909.01732Posted to arXiv on 4 September 2019 by Victor Atanasov of the Faculty of Physics, Sofia University, and revised as v2 on 9 October 2019. The arXiv non-exclusive distribution licence is a permission to distribute the preprint from arXiv, not an open content licence, so this page reproduces no text of the paper and sends the reader to the free full text at the link above. SOURCE FOR THE CLAIMS. The preprint was fetched from arXiv and read in full on 2026-09-11; every summary sentence, claim and locator below is written from it, with locators naming the paper's own numbered equations and the passages they sit in.
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Victor Atanasov (2019) Gravitational wave emission from quadrupole Josephson junction device. arXiv:1909.01732
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