Quantum teleportation across 10 miles

This is a discussion on Quantum teleportation across 10 miles within the General Discussions forums, part of the Community Boards category; Hmm... seems quite right. But really, some things just are without us knowing why. ...yet. New questions have always existed, ...

  1. #31
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    Hmm... seems quite right. But really, some things just are without us knowing why.
    ...yet. New questions have always existed, it's just a matter of solving them.

  2. #32
    Guest Sebastiani's Avatar
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    Quote Originally Posted by Brafil View Post
    Negative energy doesn't mean negative mass if you meant that. It should be the absolute value of the mass.
    Actually, it does! That's why it's called "anti-matter", after all.

    Quote Originally Posted by Mario F. View Post
    Well, it just what I think is the constant desire to take the notion antimatter a little too far.

    The idea that E=[+-]mc˛ implies the existence of a notion of negative complements to mass, speed and energy, right?.
    The speed of light (and moreover, the measure of speed itself) is never negative - it's a scalar with an absolute value. So the expression E=[+-]mc˛ will always satisfy the relation sign(E) == sign(M).
    Code:
    #include <cmath>
    #include <complex>
    bool euler_flip(bool value)
    {
        return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) 
            * std::complex<float>(std::atan(1.0)
            *(1 << (value + 2)))
        ).real() < 0;
    }

  3. #33
    (?<!re)tired Mario F.'s Avatar
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    Yes, which means the expression is meaningless and it has nothing to do with anti-matter.

    It may make sense for calculations involving kinectic movement, because there you have to deal with concepts of acceleration, deceleration, and relative masses and energy. But otherwise there's no 2nd way of writing E = mc2.
    The programmer’s wife tells him: “Run to the store and pick up a loaf of bread. If they have eggs, get a dozen.”
    The programmer comes home with 12 loaves of bread.


    Originally Posted by brewbuck:
    Reimplementing a large system in another language to get a 25% performance boost is nonsense. It would be cheaper to just get a computer which is 25% faster.

  4. #34
    Captain Crash brewbuck's Avatar
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    Quote Originally Posted by Sebastiani View Post
    The speed of light (and moreover, the measure of speed itself) is never negative - it's a scalar with an absolute value. So the expression E=[+-]mc˛ will always satisfy the relation sign(E) == sign(M).
    Unless c is imaginary.
    Code:
    //try
    //{
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);
    //}

  5. #35
    Guest Sebastiani's Avatar
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    Quote Originally Posted by brewbuck View Post
    Unless c is imaginary.
    Wow, you're right!
    Code:
    #include <cmath>
    #include <complex>
    bool euler_flip(bool value)
    {
        return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) 
            * std::complex<float>(std::atan(1.0)
            *(1 << (value + 2)))
        ).real() < 0;
    }

  6. #36
    spurious conceit MK27's Avatar
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    Quote Originally Posted by brewbuck View Post
    Unless c is imaginary.
    Glad to notice someone paying attention.
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

  7. #37
    (?<!re)tired Mario F.'s Avatar
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    I totally missed the joke(?).

    Help me here...
    The programmer’s wife tells him: “Run to the store and pick up a loaf of bread. If they have eggs, get a dozen.”
    The programmer comes home with 12 loaves of bread.


    Originally Posted by brewbuck:
    Reimplementing a large system in another language to get a 25% performance boost is nonsense. It would be cheaper to just get a computer which is 25% faster.

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