Quantum Entanglement
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The quantum details of a flower's chemicals may make the difference to our noses The theory that our sense of smell has its basis in quantum physics events is gaining traction, say researchers. The idea remains controversial, but scientists reporting at the American Physical Society meeting in Dallas, US, are slowly unpicking how it could work. The key, they say, is tiny packets of energy, or quanta, lost by electrons. Experiments using tiny wires show that as electrons move on proteins within the nose, odour molecules could absorb these quanta and thereby be detected. The means by which a detected molecule is translated into a smell within the brain has already been the subject of Nobel prize-winning research .
BBC News - Quantum physics explanation for smell gains traction
Received 21 December 2004. Revised 11 January 2005. Accepted 14 January 2005.
Physics Letters A : Quantum entanglement, indistinguishability, and the absent-minded driver's problem
By now, pretty much everybody has heard of quantum computing , that arcane science of replacing ones and zeroes that power today’s computers with qubits (Schrödinger’s Cat versions of bits). Really usable quantum computers do not yet exist, but once they do, they will be able to do things like break the RSA encryption algorithm and simulate quantum systems effectively . (Paranoids, take note: NSA is well up to speed on this .) It also looks like quantum computation and quantum information theory will be an interesting new paradigm for physics in general : a historical precedent for this is the way classical information theory was used to reformulate thermodynamics . The first rule of speculating about the future is to expect magic , and while the implications of quantum information processing mentioned above are exciting and potentially earth-shaking, they are hardly magical.
A Quantum Communist Manifesto at Tomorrow Elephant
No Comment on Qubit - The Quantum Pontiff
NSA spokesman Ken White declined to elaborate, “given the sensitivities about our work to understand the secret communications of our foreign adversaries while protecting our own communica tions, and given our desire to preserve our nation’s unique advan tages in these pursuits.”
[IP] on crypto systems from CTO PGP
Begin forwarded message: From: Jon Callas Date: July 9, 2006 5:56:15 PM EDT To: dave@farber.net Cc: Jon Callas Subject: Re: [IP] more on FBI plans new Net-tapping push Brian Randell said: Just because the government *claims* it can't break a given code ... :-) I realize that there was a smiley face at the end of this, and I might be showing humorlessness about this, but this concerns my profession in general, and my software in particular. Consequently, I have no choice but to comment on this remark. Modern cryptographic systems are essentially unbreakable, particularly if an adversary is restricted to intercepts.
Breakthrough brings 'Star Trek' teleport a step closer - Science, News - The Independent
A team of physicists has teleported data over a distance of 89 miles from the Canary Island of La Palma to the neighbouring island of Tenerife, which is 10 times further than the previous attempt at teleportation through free space. The scientists did it by exploiting the "spooky" and virtually unfathomable field of quantum entanglement - when the state of matter rather than matter itself is sent from one place to another. Tiny packets or particles of light, photons, were used to teleport information between telescopes on the two islands. The photons did it by quantum entanglement and scientists hope it will form the basis of a way of sending encrypted data.
Quantum Entanglement - Solved (with pseudocode)
I am always amazed at how such bright physicists discuss scientific anomalies, like quantum entanglement, pronounce that "that's just the way it is" and never seriously consider an obvious answer and solution to all such anomalies - namely that perhaps our reality is under programmed control. For the quantum entanglement anomaly, I think you will see what I mean. Imagine that our world is like a video game. As with existing commercial games, which use "physics engines", the players (us) are subject to the rules of physics, as are subatomic particles.Quantum pseudo-telepathy is a phenomenon in quantum game theory resulting in anomalously high success rates in coordination games between separated players. These high success rates would require communication between the players in a purely classical (non-quantum) world; however, the game is set up such that during the game, communication is physically impossible. Quantum pseudo-telepathy is often and easily misrepresented as paranormal [ 1 ] , given that most people are not aware that the quantum laws of physics are subtly non-local and allow violations of Bell inequalities . This means that for quantum pseudo-telepathy to occur, prior to the game the participants need to share a physical system in an entangled quantum state , and during the game have to execute measurements on this entangled state as part of their game strategy. Games in which the application of such a quantum strategy leads to pseudo-telepathy are also referred to as quantum non-locality games.
Quantum pseudo-telepathy - Wikipedia, the free encyclopedia
Quantum Entanglement Questions. Quantum Weirdness.
'We must be clear that when it comes to atoms, language can be used only as in poetry.' — N. Bohr. What I most love of quantum mechanics is that it is nondeterministic , which means that it’s generally doesn’t predict the outcome of any measurement with certainty. Instead, it just provides the probabilities of the outcomes , so that ‘measurements of a certain property done on two apparently identical systems can give different answers’ — to put it simply, the Truth is unfathomable .
Debunking and closing quantum entanglement 'loopholes'
(PhysOrg.com) -- An international team of physicists, including a scientist based at The University of Queensland, has recently closed an additional 'loophole' in a test explaining one of science's strangest phenomena -- quantum entanglement. Quantum entanglement is a phenomenon that connects two particles (for example, photons) in such a way that changes to one of the particles are reflected instantly in the other, even if they are light-years apart. “Despite the enormous success of quantum mechanics , its completeness is experimentally still unproven after more than 75 years,” said Dr Alessandro Fedrizzi (now in UQ's School of Mathematics and Physics). Dr Fedrizzi co-wrote the findings of the study together with a team from the Institute for Quantum Optics and Quantum Information, and the University of Vienna in Austria, led by Professor Anton Zeilinger.
These pages explain quantum entanglement by way of pictures, analogies, but without math. To understand quantum entanglement, several ideas and words must be explained, especially the idea of a photon . The photon is a key concept in physics, and so critical to entanglement that its behaviours must be fully understood. But before delving into the details of photons, let's take a look at the world of the tiny, beginning with waves and atoms.
Quantum Entanglement
Quantum entanglement occurs when particles such as photons , electrons , molecules as large as buckyballs , [ 1 ] [ 2 ] and even small diamonds [ 3 ] [ 4 ] interact physically and then become separated; the type of interaction is such that each resulting member of a pair is properly described by the same quantum mechanical description ( state ), which is indefinite in terms of important factors such as position , [ 5 ] momentum , spin , polarization , etc. According to the Copenhagen interpretation of quantum mechanics , their shared state is indefinite until measured. [ 6 ] Quantum entanglement is a form of quantum superposition . When a measurement is made and it causes one member of such a pair to take on a definite value (e.g., clockwise spin), the other member of this entangled pair will at any subsequent time [ 7 ] be found to have taken the appropriately correlated value (e.g., counterclockwise spin).
Quantum entanglement - Wikipedia, the free encyclopedia
ScienceDaily (May 8, 2009) — Scientists at the California Institute of Technology (Caltech) have developed an efficient method to detect entanglement shared among multiple parts of an optical system. They show how entanglement, in the form of beams of light simultaneously propagating along four distinct paths, can be detected with a surprisingly small number of measurements. Entanglement is an essential resource in quantum information science, which is the study of advanced computation and communication based on the laws of quantum mechanics. In the May 8 issue of the journal Science , H. Jeff Kimble, the William L. Valentine Professor and professor of physics at Caltech, and his colleagues demonstrate for the first time that quantum uncertainty relations can be used to identify entangled states of light that are only available in the realm of quantum mechanics.