Search
Search results
-
Density matrix
A density matrix , or density operator , is used in quantum theory to ... to be in a pure state . Typical situations in which a density matrix is needed include: a quantum system in thermal equilibrium (at ... where each individual system must be described by a density matrix even though the complete system may be in a pure state. See ...
Wiki article - Anonymous (not verified) - 08/09/2020 - 13:08 - 0 comments
-
States
... states, or mixed state , the density operator (or density matrix), ρ , is used. This extends quantum mechanics to ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
-
Density operator
REDIRECT Density matrix 1020 reads Last modified: ...
Wiki article - JMiszczak - 26/10/2015 - 17:56 - 0 comments
-
NMR
... where n is the number of qubits. That means the Density matrix is really huge! As huge as the whole Hilbert Space of the ... IZ+XI IZ+YI IZ+ZI Theory State and Density Matrix The calculation of each individual spin is impracticle and ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
-
Bloch sphere
...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
-
Squashed entanglement
... a bipartite quantum system. If $\varrho_{A, B}$ is the density matrix of a system ( A , B ) composed of two subsystems ... . Now suppose $\varrho_{A, B, \Lambda}$ is the density matrix for a tripartite system ( A , B , Λ) . We will ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
-
Linear entropy
... \mbox{Tr}(\rho^2) \,$$ where ρ is the density matrix of the state. The linear entropy can range between zero, ... mixed state. (Here, d is the dimension of the density matrix.) Linear entropy is trivially related to the purity ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:37 - 0 comments
-
Positive partial transpose
... criterion is a necessary condition for the joint density matrix ρ of two systems A and B to be ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments
-
Quantum information
... chosen randomly from some distribution denoted by the density matrix ρ . Then Ben Schumacher showed that the number of ... what ensemble they are chosen from. One only knows the density matrix ρ . An elegent way to think of this is to think of ...
Wiki article - JMiszczak - 26/10/2015 - 17:56 - 0 comments
-
Entanglement characterization of a two-level system
... . Thanks to the bi-orthogonal form, the reduced density matrix $\rho _{1,2}=Tr_{2,1}\left| \rm Schmidt \right\rangle ...
Wiki article - Anonymous (not verified) - 26/10/2015 - 17:56 - 0 comments