X-Message-Number: 18467 From: Date: Sat, 2 Feb 2002 12:02:50 EST Subject: Re: Simulation --part1_3a.2156f08d.298d75ba_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit From: Philip Rhoades <>: >Does this still hold true if time/space has much more than four dimensions (super >strings etc)? Short answer: Yes. Recently, there has been a set of theories where many dimensions are large, but outside gravitation, all known forces propagate only in 3 space dimensions and one time. For a 10 billions light-year extension, there is something as 10^61 Planck's units. So, in the most common eleven dimensional universe there would be: 10^(61x11) = 10^671 eleven dimensional elementary hypercubes. In basic Super-Symetry, .all dimensions beyond the first four are rolled-up at Planck's scale, so they don't add more elementary cubes, on the other hand, each cube becomes very complex and needs more informations to be described. Henri Kluytmans <> said: >A quantum computer of 813 coupled qubits can only store a superposition ;of all 2^813 >possible combinations of 813 normal bits. And it can perform operations on all those >2^813 combinations in only one single operational step. Yes, I agree. >But it can not store or operate on 10^244 (~= 2^813) bits! The possible combinations of >that number of bits are 2^(10^244) !!! Please note: We have a 2^813 states, each is a 813 bits word. This define a four dimensional classical universe. There is no storage implied. After one computing round, everything is destroyed if there is no coupling to a more long lived quantum state. In our world the simulation lives only a spilt second. It is only in its own internal simulated time that it live for then billions of years. What you write about, 2^(10^244), would define a simulation where each instant of each elementary domain would interact with each other. This is a world with time travel and multi stories: You can attach a full classical universe to each point at each instant, this is Everett's multi-world . >Furthermore, does a Planck cube contain only 1 bit of information ? Given the scale of Planck's length, one bit per elementary unit seems sufficient: a cell is full or empty.If you move from classical space to super strings for example, then there is a lot of structures at or near Planck's scale and you need more bits of information. My purpose was to illustrate the power of quantum computing on a basic universe simulation, not to explore the limits of Everett's multi-universes or advanced string world. >>This illustrates the potential power of quantum computers and the >>effect of state superposition in quantum mechanics. >Sorry, but this seems to be a huge misconception about the >potential power of quantum computers. It seems we don't see the same universe :-) or at least we don't assume the same basic components of the universe. Yvan Bozzonetti. --part1_3a.2156f08d.298d75ba_boundary Content-Type: text/html; charset="US-ASCII" [ AUTOMATICALLY SKIPPING HTML ENCODING! ] Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=18467