Generation of Density Matrices for Two Qubits Using Coherent and Incoherent Controls

2021 ◽  
Vol 42 (10) ◽  
pp. 2401-2412
Author(s):  
O. V. Morzhin ◽  
A. N. Pechen
Keyword(s):  
Density Matrices

Reduced Density Matrices

2000 ◽  
Author(s):  
A. John Coleman ◽  
Vyacheslav I. Yukalov
Keyword(s):  
Density Matrices ◽  
Reduced Density Matrices ◽  
Reduced Density

scholarly journals Fermi gas approach to general rank theories and quantum curves

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Naotaka Kubo
Keyword(s):  
Matrix Models ◽  
Critical Role ◽  
Three Dimensional ◽  
Fermi Gas ◽  
Fermi Gases ◽  
Partition Functions ◽  
Density Matrices ◽  
General Rank ◽  
Chern Simons ◽  
The Ideal

Abstract It is known that matrix models computing the partition functions of three-dimensional $$ \mathcal{N} $$ N = 4 superconformal Chern-Simons theories described by circular quiver diagrams can be written as the partition functions of ideal Fermi gases when all the nodes have equal ranks. We extend this approach to rank deformed theories. The resulting matrix models factorize into factors depending only on the relative ranks in addition to the Fermi gas factors. We find that this factorization plays a critical role in showing the equality of the partition functions of dual theories related by the Hanany-Witten transition. Furthermore, we show that the inverses of the density matrices of the ideal Fermi gases can be simplified and regarded as quantum curves as in the case without rank deformations. We also comment on four nodes theories using our results.

scholarly journals Transition density matrices of Richardson–Gaudin states

2021 ◽  
Vol 154 (12) ◽  
pp. 124125
Author(s):  
Paul A. Johnson ◽  
Hubert Fortin ◽  
Samuel Cloutier ◽  
Charles-Émile Fecteau
Keyword(s):  
Transition Density ◽  
Density Matrices

Discussion on "Structure of Fermion Density Matrices"

1963 ◽  
Vol 35 (3) ◽  
pp. 687-689 ◽  
Author(s):  
A. J. Coleman
Keyword(s):  
Density Matrices
Sign in / Sign up

Export Citation Format

Share Document