where ħ is the reduced Planck constant. The original heuristic argument that such a limit should exist was given by Heisenberg, after whom it is sometimes named the Heisenberg principle. This ascribes the uncertainty in the measurable quantities to the jolt-like disturbance triggered by the act of observation. Though widely repeated in textbooks, this physical argument is now known to be fundamentally misleading. While the act of measurement does lead to uncertainty, the loss of precision is less than that predicted by Heisenberg's argument; the formal mathematical result remains valid, however. Since the uncertainty principle is such a basic result in quantum mechanics, typical experiments in quantum mechanics routinely observe aspects of it. Certain experiments, however, may deliberately test a particular form of the uncertainty principle as part of their main research program.
Consciousness is a loosely defined concept that addresses the human awareness of both internal and external stimuli. This can refer to spiritual recognition, psychological understanding, medically altered states, or more modern-day concepts of life purpose, satisfaction, and self-actualization. Most theories map consciousness in a series of levels, some stages of which are more continuous or complex than others. Movement between stages is often bidirectional depending on internal and external conditions, with each mental ascension precipitating a change in reactivity. In the most basic sense, this alteration might lead to a reduced responsiveness as seen in anesthesiology; more abstract facets of tiered consciousness describe characteristics of profoundness, insight, perception, or understanding. Level of consciousness (Esotericism)
Neural correlates of consciousness Figure 1: The Neuronal Correlates of Consciousness (NCC) are the minimal set of neural events and structures – here synchronized action potentials in neocortical pyramidal neurons – sufficient for a specific conscious percept or a conscious (explicit) memory. From Koch (2004). The Neural Correlates of Consciousness (NCC) can be defined as the minimal neuronal mechanisms jointly sufficient for any one specific conscious percept (Crick & Koch 1990).
Our Conscious Mind Could Be An Electromagnetic Field Our Conscious Mind Could Be An Electromagnetic Field Are our thoughts made of the distributed kind of electromagnetic field that permeates space and carries the broadcast signal to the TV or radio. Professor Johnjoe McFadden from the School of Biomedical and Life Sciences at the University of Surrey in the UK believes our conscious mind could be an electromagnetic field. “The theory solves many previously intractable problems of consciousness and could have profound implications for our concepts of mind, free will, spirituality, the design of artificial intelligence, and even life and death,” he said. Most people consider "mind" to be all the conscious things that we are aware of. But much, if not most, mental activity goes on without awareness.
Neural correlates of consciousness
Measurement in quantum mechanics A measurement always causes the system to jump into an eigenstate of the dynamical variable that is being measured, the eigenvalue of this eigenstate belongs to being equal to the result of the measurement— P.A.M. Dirac (1958) in "The Principles of Quantum Mechanics" p. 36 The framework of quantum mechanics requires a careful definition of measurement. The issue of measurement lies at the heart of the problem of the interpretation of quantum mechanics, for which there is currently no consensus. Measurement from a practical point of view
Quantum entanglement is a physical phenomenon that occurs when pairs or groups of particles are generated or interact in ways such that the quantum state of each particle cannot be described independently – instead, a quantum state may be given for the system as a whole. Such phenomena were the subject of a 1935 paper by Albert Einstein, Boris Podolsky and Nathan Rosen, describing what came to be known as the EPR paradox, and several papers by Erwin Schrödinger shortly thereafter. Einstein and others considered such behavior to be impossible, as it violated the local realist view of causality (Einstein referred to it as "spooky action at a distance"), and argued that the accepted formulation of quantum mechanics must therefore be incomplete.
Greetings, loyal readers of me reading other people's mail! I had a weird occurrence the other day — I finally got a letter that I couldn't deliver. I have no idea how this is the first time that this has come up, it being the post-apocalypse and all, but there it was. The letter had a return address on it, so I knew immediately what I had to do — burn it.
24 March 2011Last updated at 13:58 By Jason Palmer Science and technology reporter, BBC News, Dallas 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. Quantum physics explanation for smell gains traction
Abstract The absent-minded driver's problem illustrates that probabilistic strategies can give higher pay-offs than deterministic ones. We show that there are strategies using quantum entangled states that give even higher pay-offs, both for the original problem and for the generalized version with an arbitrary number of intersections and any possible set of pay-offs. Physics Letters A : Quantum entanglement, indistinguishability, and the absent-minded driver's problem
The Age of Entanglement: When Quantum Physics Was Reborn - Louisa Gilder
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 A previous article on the meeting at Bell labs that I attended . Notable: The National Institute of Standards and Technology and the super-secret National Security Agency are backing U.S. quantum projects. 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.” Ack.
[IP] on crypto systems from CTO PGP [ Date Prev ] | [ Thread Prev ] | [ Thread Next ] | [ Date Next ] -- [ Date Index ] | [ Thread Index ] | [ interesting-people Home ] Subject : [IP] on crypto systems from CTO PGP From : David Farber <firstname.lastname@example.org> To : email@example.com Date : Mon, 10 Jul 2006 06:04:17 -0400 Begin forwarded message: From: Jon Callas <firstname.lastname@example.org> Date: July 9, 2006 5:56:15 PM EDT To: email@example.com Cc: Jon Callas <firstname.lastname@example.org> 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 ... :-)
Breakthrough brings 'Star Trek' teleport a step closer - Science, News 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) Lurking amidst the mass chaos of information that exists in our reality is a little gem of a concept called the Quantum Zeno Effect. It is partially named after ancient Greek philosopher Zeno of Elea, who dreamed up a number of paradoxes about the fluidity of motion and change. For example, the “Arrow Paradox” explores the idea that if you break down time into “instants” of zero duration, motion cannot be observed. Thus, since time is composed of a set of instants, motion doesn’t truly exist.
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. 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
Quantum Entanglement Questions. Quantum Weirdness.
723-CCC05screen.pdf (application/pdf Object)
Debunking and closing quantum entanglement 'loopholes'
Quantum Mechanics: Uncertainty Principle Used To Detect Entanglement Of Photon Shared Among Four Locations
Quantum networks advance with entanglement of photons, solid-state qubits
A Step Towards Quantum Computing: Entangling 10 Billion Particles | 80beats
New painting - Quantum Entanglement
Idealism Versus Materialism | A Philosophical Debate | Reading Between The Lines