I first met Dr. Young Bae, NIAC Fellow, at the Defense Advanced Research Projects Agency (DARPA) sponsored 2011, 100 Year Starship Study (100YSS) at Orlando, Fla. Many of us who were there had responded to the NASA/DARPA Tactical Technology Office’s RFP to set up an organization “… to develop a viable and sustainable non-governmental organization for persistent, long-term, private-sector investment into the myriad of disciplines needed to make long-distance space travel viable …”
Yes, both DARPA and NASA are at some level interested in interstellar propulsion. Mine was one of approximately 35 (rumored number) teams from around the world vying for this DARPA grant, and Dr. Bae was with a competing team. I presented the paper “Non-Gaussian Photon Probability Distributions”, and Dr. Bae presented “A Sustainable Developmental Pathway of Photon Propulsion towards Interstellar Flight”. These were early days, the ground zero of interstellar propulsion, if you would.
Dr. Bae has been researching Photon Laser Thrust (PLT) for many years. A video of his latest experiment is available at the NASA website or on YouTube. This PLT uses light photons to move an object by colliding with (i.e. transferring momentum to) the object. The expectation is that this technology will eventually be used to propel space crafts. His most recent experiments demonstrate the horizontal movement of a 1-pound weight. This is impressive. I expect to see much more progress in the coming years.
At one level, Dr. Bae’s experiments are confirmation that Bill Nye’s Light Sail (which very unfortunately lost communications with Earth) will work.
At another level, one wonders why or how the photon, a particle without mass, has momentum that is proportion to the photon’s frequency or energy. A momentum that is observable in Dr. Bae’s and other experiments. This is not a question that contemporary physics asks. Einstein was that meticulous when he derived the Lorentz-FitzGerald Transformations (LFT) from first principles for his Special Theory of Relativity (STR). Therefore, if you think about it, and if we dare to ask the sacrilegious question, does this mean that momentum is a particle’s elementary property that appears to be related to mass? What would we discover if we could answer the question, why does momentum exist in both mass and massless particles? Sure, the short cut don’t bother me answer is, mass-energy equivalence. But why?
At the other end of photon momentum based research is the EmDrive invented by Roger Shawyer. He clearly states that the EmDrive is due to momentum exchange and not due to “quantum vacuum plasma effects”. To vindicate his claims Boeing has received all of his EmDrive designs and test data. This is not something that Boeing does lightly.
In this 2014 video a member of NASA’s Eagleworks explains that the EmDrive (renamed q-thruster) pushes against quantum vacuum, the froth of particle and antiparticle pairs in vacuum. Which raises the question, how can you push against one type and not the other? In 2011, using NASA’s Fermi Gamma-ray Space Telescope photographs, Prof. Robert Nemiroff of Michigan Technological University, made the stunning discovery that this quantum foam of particle and antiparticle pairs in a vacuum, does not exist. Unfortunately, this means that the NASA Eagleworks explanation clearly cannot be correct.
So how does the EmDrive work?
In my 2012 book An Introduction to Gravity Modification, I had explained the importance of asymmetrical fields and designs for creating propellantless engines. For example, given a particle in a gravitational field and with respect to this field’s planetary mass source, this particle will observe an asymmetrical gravitational field. The near side of this particle will experience a stronger field than the far side, and thus the motion towards the planetary mass. Granted that this difference is tiny, it is not zero. This was how I was able to determine the massless formula for gravitational acceleration, g=τc^2, where tau τ is the change in the time dilation transformation (dimensionless LFT) divided by that distance. The error in the modeled gravitational acceleration is less than 6 parts per million. Thus validating the asymmetrical approach.
In very basic terms Shawyer’s New Scientist paper suggests that it is due to the conical shape of the EmDrive that causes microwave photons to exhibit asymmetrical momentum exchange. One side of the conical structure with the larger cross section, has more momentum exchange than the other side with the smaller cross section. The difference in this momentum exchange is evidenced as a force.
However, as Dr. Bae points out, from the perspective of legacy physics, conservation of momentum is broken. If not broken, then there are no net forces. If broken, then one observes a net force. Dr. Beckwith (Prof., Chongqing University, China) confirms that Dr. Bae is correct, but the question that needs to be addressed is, could there be any additional effects which would lead to momentum conservation being violated? Or apparently violated?
To be meticulous, since energy can be transmuted into many different forms, we can ask another sacrilegious question. Can momentum be converted into something else? A wave function attribute for example, in a reversible manner, after all the massless photon momentum is directly proportional to its frequency? We don’t know. We don’t have either the theoretical or experimental basis for answering this question either in the positive or negative. Note, this is not the same as perpetual motion machines, as conservation laws still hold.
Shawyer’s work could be confirmation of these additional effects, asymmetrical properties and momentum-wave-function-attribute interchangeability. If so, the future of propulsion technologies lies in photon based propulsion.
Given that Shawyer’s video demonstrates a moving EmDrive, the really interesting question is, can we apply this model to light photons? Or for that matter, any other type of photons, radio, infrared, light, ultraviolet and X-Rays?
“The evidence is incontrovertible that recent extinction rates are unprecedented in human history and highly unusual in Earth’s history. Our analysis emphasizes that our global society has started to destroy species of other organisms at an accelerating rate, initiating a mass extinction episode unparalleled for 65 million years. If the currently elevated extinction pace is allowed to continue, humans will soon (in as little as three human lifetimes) be deprived of many biodiversity benefits.”
“The high seas of Mars may never have existed. According to a new study that looks at two opposite climate scenarios of early Mars, a cold and icy planet billions of years ago better explains the water drainage and erosion features seen today.”
“[W]ith the help of a new mapping method, scientists have created what they’re calling the most accurate map of the Milky Way. It confirms our galaxy is a four-armed spiral and shows in unprecedented detail a series of star clusters at the galaxy’s edge.”
“Instead of treating Amsterdam as complete and starting again elsewhere, the IJburg plan has managed to find more space in a city that thought it had no more left.”
“The fifty-eighth session of the Committee on the Peaceful Uses of Outer Space will be held from 10–19 June 2015 at the United Nations Office at Vienna, Vienna International Center, Vienna, Austria.”
” “Following these rules, we’ve demonstrated that we can make all the universal logic gates used in electronics, simply by changing the layout of the bars on the chip,” said Katsikis. “The actual design space in our platform is incredibly rich. Give us any Boolean logic circuit in the world, and we can build it with these little magnetic droplets moving around.”
The current paper describes the fundamental operating regime of the system and demonstrates building blocks for synchronous logic gates, feedback and cascadability – hallmarks of scalable computation. A simple-state machine including 1-bit memory storage (known as “flip-flop”) is also demonstrated using the above basic building blocks. ”
NASA said that if all goes to plan with these studies, it sees the first business-jet-sized supersonic planes going into production by 2025, and commercial planes by 2030.
When I was a freshman at Cornell University some decades ago, I had a memorable teaching assistant for CS100, the entry level computer programming course taken by nearly every student in Engineering or Arts & Sciences. Gilles Brassard, a French Canadian, is now a chaired math professor at Université de Montréal and a preeminent cryptographer. He has also been inducted into the Royal Order of Canada. I am told that this is a bit like being knighted. In fact, this highest of civilian honors was established by Queen Elizabeth.
The author with Gilles Brassard in 2014
Gilles was a graduate student at Cornell in the mid ’70s. Back then, public key encryption was a radical concept. Named for three MIT professors who described it, RSA is now it is at the heart of every secure Internet transaction. Yet, the new generation of cryptographers refers to RSA as “classical cryptography”. The radicals have moved on to Quantum Cryptography. Gilles and his collaborator, Charles Bennett, are the pioneers and leaders in this burgeoning field. No one else is even pretender to the throne.
In its simplest terms, quantum cryptography achieves a secure communication channel because it relies on a stream of individual particles or “quanta” to convey information. If information is sent without any fat at all—just the minimum physics that can support the entropy—then any eavesdropping or rerouting of a message can be detected by the recipient. Voila! Perfect authentication, fidelity and security. Communication is secure because any attack can be detected.
But when you begin to experiment with gating individual quanta of anything, you are typically working within a world of minute, elementary particles—things like photons or electrons with properties that change as they are measured. And the issue of measurement doesn’t just invoke Heisenbeg (he demonstrated that measurements change a property being measured), but also superpositioning of states that resolve only when they are observed. Say, Whaaht?!
Perhaps, we are getting ahead of ourselves. The goal of this article is to share a strange, thoroughly unexpected, awe-inspiring, yet repeatable experimental results achieved by quantum physicists. I am no expert, but given a sufficiently lay explanation, marvel with me at a baffling outcome. It will shake your perception of reality. It suggests that science and math are not as black and white as you believed.
The EPR Paradox Albert Einstein worked for years to develop an understanding of entangled particles that was consistent with his earlier work in special relativity. By the mid 20th century, physicists were reasonably certain that information could never be conveyed faster than light. It’s not just the math that convinced them. It was the crazy things that would ensue if light speed was not a universal speed limit…
If information—mass or energy, particle or wave, substantive or pure thought—if any of these things travels faster light, then given the time dilation of things moving in relation to each other, very unlikely things would be possible. For example:
If information travels faster than light. it would be possible to deliver a reply to a message that had not yet been sent
If information travels faster than light, it would be possible to send a message back in time and prevent your parents from meeting each other
So the math that imposes a universal speed limit also preserves our concept of reality. Sure, we can accept that energy and mass are fungible. We can even accept that distance and time are malleable. But time paradoxes defy common sense and beg for a solution that prevents them, altogether.
When the most reasonable explanation of quantum entanglement collided with our understanding of special relativity, efforts to reconcile the two theories or arrive at a unifying model became known as the EPR Paradox, named after Einstein and his colleagues, Boris Podolsky and Nathan Rosen. Given assumptions considered axiomatic, the math suggests that information passes between entangled particles faster than light — in fact, instantaneously and at any distance. Near the end of his life, Einstein reluctantly acknowledged that there must be an error in math, or in basic assumptions, or that some undiscovered, rational explanation could resolve the paradox. Ultimately, he dismissed the notion of particles synchronously and instantly communicating with each other as “spooky action at a distance”. Just as his other memorable quote, “God doesn’t play dice with the world”, the two phrases are indelibly inscribed onto the great physicist’s epitaph.
Before humans could travel to the moon (about 1.3 light seconds from earth), researchers tried to test Einstein’s theory. But even with precise instruments to measure time and distance, it was too difficult in the 1930s and 40s to create, transport and measure characteristics of elementary particles and then discriminate their behavior in such close proximity.
Back then, Einstein assumed that we would measure wave collapse positions or particle momentum. But today, scientists are more keen on measuring another quantum phenomenon: particle spin or photon polarization—or particle destruction. These properties are more easily changed and measured. In the 1960s and 70s, the EPR paradox returned to popular inquiry when physicists John Stewart Bell—and later Lamehi-Rachti and Mittig, conducted experiments that supported Einstein’s original thesis. That is, faster-than-light communication seemed to take place.
So, given appropriate experimental methodology, could it actually be possible to receive a package before it was sent? This is, after all, the disturbing conclusion of faster-than-light communication.
Probably not. But the experimental result is more shocking than “Yes” and way more interesting than “No”. In fact, the outcome to recent experiments force us to confront our understanding of causality. It makes us wonder if reality is an illusion. It shatters our concept of time and space even more than Einstein’s more famous theory of relativity.
Since measurements made in nanoseconds are difficult to visualize, I shall illustrate the experiment and the surprising results by stretching the distance involved. But this is not a metaphor. Actual results actually play out as described here. Continue below image…
The Experiment
Suppose that I create a pair of entangled particles. It doesn’t matter what this means or how I accomplish the feat. I wish only to test if a change to one particle affects the other. But more specifically, I want to separate them by a great distance and determine if a change to the local particle influences the remote particle instantly, or at least faster than accounted for by a light-speed signal between the two of them.
If you could construct such an experiment, it seems reasonable to assume that you would observe one of four possible outcomes. The results should demonstrate that the remote particle is either:
not affected at all
affected – apparently instantly or nearly in synchrony with the first particle
affected – but only after a delay in which a light speed signal could reach it
uncorrelated or inconsistently correlated with it’s entangled mate
The actual result is none of these, and it is almost too stunning to contemplate. In fact, the particle is highly correlated, but the correlation is with the observer’s cognition. But again, I am getting ahead of myself. Let’s look at our experimental set up…
I send an astronaut into space with a box that contains an experimental apparatus. The astronaut travels a distance about as far away from Earth as the sun. It takes about 8 minutes for light (or any message) to reach the astronaut. The box contains the “twin” of many paired particles back on earth. Each particle is trapped in a small crystal and numbered. The box also contains an instrument that can measure the polarization of any photon and a noisy inkjet printer that can be heard from outside the box.
Back on the earth, I have the mate to each paired photon. All of my photons exhibit a polarity than can be measured and expressed as a 2-D angle with any value from 0 to 360 degrees. Our test uses polarized filters to measure the angle of polarity and is very accurate. We can record 4 digits of precision. For the purpose of this test, it doesn’t matter if our measurement affects a particle or even if it destroys it, because we can repeat the test many times.
Clocks on the earth and at the spaceship are synchronized, and the ship is not moving relative to the earth. It is effectively stationary. On earth, each numbered photon is disturbed exactly on the hour. At the spaceship, an astronaut measures the polarity of a paired photon one minute before and one minute after each hourly event.
We know that our photons all begin with a polarity of 15.48 degrees as measured relative some fixed and rigid orientation. The astronaut confirms this with each photon tested before the hourly chime. But at each hour (say 3PM in New York), we disturb a photon on earth (radiate it or pass it through a filter). This changes its polarity.
Suppose that the earth lab determines that a photon was changed at 3PM from a polarity of 15.48° to a polarity of 122.6°. (Any new polarization will do).
Recall that the spaceship is 8 light-minutes away. We wish to determine if photon pairs communicate more quickly than the speed of light. Question: If the astronaut tests the polarity of the paired photon at 3:01 PM (just after its mate on the earth has been altered), do you suppose that he will still detect the original spin of 15.48°? Or will he detect the new spin of 122.6°?
The answer is more startling than either outcome. In fact, it leaves most people in disbelief or outright denial. (Yes…You are being set up for a surprise. But what is it?!)
To make things more interesting, let’s say that you cannot see the results. The box is sealed during the experiment, but you can hear the printer within the box as it prints the polarity after each test. Each time you run the experiment, you unplug the printer right after you hear it print a result. Then, you open the box and read the results.
Spookiness at a Distance
If you open the box less than 8 minutes after the hour (that is, less than the time that it takes light to travel from earth to the astronaut), the printout will always show a polarity of 15.48°. If you open the box after 8 minutes, you will always see a polarity of 122.6°. In both cases, the test was completed and the result was printed in the first minute after the photon on earth was shifted to a new polarization.
Wait! It gets better! If you eventually learn to distinguish the different sounds that the printer makes when it records either result, it will always print 15.48°, even if you wait 8 minutes before actually looking at the print out. The fact that you found a way to ‘cheat’ apparently changes the outcome. Or at least, that is the conclusion that a reasonable person would make when presented with knowledge-induced causality. It’s either that—or we are all crazy.
But quantum physicists (and cryptographers like Gilles) have another explanation. They point out that Einstein’s theory of special relativity doesn’t actually prohibit faster than light phenomena. It only prohibits faster than light communication. If the thing that happens instantaneously cannot be pressed into conveying useful information, then it doesn’t violate special relativity! That is, perturbations applied to one part of a quantum entangled pair are apparently instantaneous, but an observation or experiment on the remote twin will not produce a result that allows you to determine the new state until sufficient time for a light beam to pass from one to the other.
Alternate explanation: This one is known as “Schrödinger’s cat”. In my opinion it was contrived to support both quantum mechanics and the EPR paradox. It states that the paired photon simultaneously existed at both polarities until someone opened the box or otherwise learned its state. That is, the observed result was not a real thing, until the observation forced it to collapse into reality. Common sense says that this explanation makes no sense! And yet, it neatly resolves a lot of mathematics. Go figure!
Here is another explanation. I like this one better… Perhaps time is not an arrow that always moves in one direction and one speed. In contradiction to our intuition (based on a limited set of human senses), perhaps we are not continuously pushed forward at the tip of that arrow. –What if the science fiction about space and time being folded is true? –Or perhaps… Oh Heck! I’ll go with the first explanation: From our perspective, entangled particles change simultaneously, but mysterious forces of nature don’t allow us to observe the change until the laws of special relativity allow it. Why is that?… Because if we could observe information before it was ‘legal’ to do so, then we could change the past.
The take away to this experiment is that just like wave velocity, some things move faster than the speed of light, but useful information cannot do so. For useful information, light is still the speed limit.
Quantum physicists do not typically use my thought experiment, which I call Hidden Printer Result. Instead, they explain that Bell’s experiments prove that the spin measurement distant, entangled particles demonstrates they are connected in a spooky way (because the detected spin is provably opposite for each measurement)—but that Einsteien’s theory is preserved, because individuals measuring particles cannot know that their measurements are correlated until they communicate or meet. That communication is still restricted to light-speed limits, and therefore, useful information did not violate special relativity.
The Hidden Printer Result is a way in which we laypeople could observe and marvel at the transmission of unbelievably fast, but ‘useless’ information. It is a valid experimental setup that allows us to better comprehend that which defies common sense.
This Youtube video provides a more conventional, but more complex explanation of quantum entanglement and the EPR P
Gilles Brassard is not a physicist, but a computer scientist and cryptographer. Yet he has received awards that are typically given to physicists. His experiments and those by scientists around the world render a layperson like me dumbstruck.
Of course, Gilles didn’t ship an inkjet printer into space with half of an entangled pair (my experimental construct). Instead, he measured and recorded a particle state in a way that is self-encrypted. He then he sent the encryption key from the distant particle that had been disturbed. Even though the key is just two bits (too little to contain a measurement of photon spin), the old spin was observed if the key was applied before the time it would have taken to classically transmit and receive the information.
Just as with my experimental setup, results are almost too much to wrap a proverbial brain around. But truths that are hard to believe make great fodder for Lifeboat members. If my non-scientific, jargon free explanation gets across the results of the EPR experiment (actually, it is at the leading edge of my own understanding), then you are now as puzzled and amazed as me.
The Experiment