Nathaniel at 16:29, 20 January 2016

2016-01-20T16:29:43Z

← Older revision		Revision as of 16:29, 20 January 2016
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	<tt>'''pure_to_mixed'''</tt> is a [[List of functions\|function]] that convert's a state's current representation (either as a pure state vector or as a density matrix) into a density matrix.		<tt>'''pure_to_mixed'''</tt> is a [[List of functions\|function]] that convert's a state's current representation (either as a pure state vector or as a density matrix) into a density matrix. This function just exists to make the code within some other functions a bit cleaner.

	==Syntax==		==Syntax==

Nathaniel: Created page with "{{Function |name=pure_to_mixed |desc=Converts a state vector or density matrix representation of a state to a density matrix |cat=List of functions#Helper_functions|Helper f..."

2016-01-12T13:52:35Z

Created page with "{{Function |name=pure_to_mixed |desc=Converts a state vector or density matrix representation of a state to a density matrix |cat=List of functions#Helper_functions|Helper f..."

New page

{{Function
|name=pure_to_mixed
|desc=Converts a state vector or density matrix representation of a state to a density matrix
|cat=[[List of functions#Helper_functions|Helper functions]]
|upd=January 12, 2016
|helper=1}}
<tt>'''pure_to_mixed'''</tt> is a [[List of functions|function]] that convert's a state's current representation (either as a pure state vector or as a density matrix) into a density matrix.

==Syntax==
* <tt>RHO = pure_to_mixed(PHI)</tt>

==Argument descriptions==
* <tt>PHI</tt>: A density matrix or a pure state vector.

==Examples==
The following code shows that if <tt>v</tt> is a pure state vector then <tt>pure_to_mixed(v) == v*v'</tt>, yet if <tt>rho</tt> is a density matrix then <tt>pure_to_mixed(rho) == rho</tt>.
<syntaxhighlight>
>> v = RandomStateVector(2)

v =

0.6732 - 0.5736i
0.3190 + 0.3407i

>> pure_to_mixed(v)

ans =

0.7822 0.0193 - 0.4123i
0.0193 + 0.4123i 0.2178

>> pure_to_mixed(v*v')

ans =

0.7822 0.0193 - 0.4123i
0.0193 + 0.4123i 0.2178

>> v*v'

ans =

0.7822 0.0193 - 0.4123i
0.0193 + 0.4123i 0.2178
</syntaxhighlight>

{{SourceCode|name=pure_to_mixed|helper=1}}

Pure to mixed - Revision history

Nathaniel at 16:29, 20 January 2016

Nathaniel: Created page with "{{Function |name=pure_to_mixed |desc=Converts a state vector or density matrix representation of a state to a density matrix |cat=List of functions#Helper_functions|Helper f..."