Contrasting unitary transformations for the standard bipolaron model

1999 ◽  
Vol 60 (5) ◽  
pp. 3252-3263 ◽  
Author(s):  
Th. Frank ◽  
M. Wagner
Keyword(s):  
Unitary Transformations ◽  
Bipolaron Model

scholarly journals Experimental demonstrations of unconditional security in a purely classical regime

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Byoung S. Ham
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Unconditional Security ◽  
Zehnder Interferometer ◽  
Experimental Demonstration ◽  
Orthogonal Bases ◽  
Unitary Transformations ◽  
Mach Zehnder Interferometer

AbstractSo far, unconditional security in key distribution processes has been confined to quantum key distribution (QKD) protocols based on the no-cloning theorem of nonorthogonal bases. Recently, a completely different approach, the unconditionally secured classical key distribution (USCKD), has been proposed for unconditional security in the purely classical regime. Unlike QKD, both classical channels and orthogonal bases are key ingredients in USCKD, where unconditional security is provided by deterministic randomness via path superposition-based reversible unitary transformations in a coupled Mach–Zehnder interferometer. Here, the first experimental demonstration of the USCKD protocol is presented.

Lie groups and unitary transformations in ligand field theory

1983 ◽  
Vol 23 (1) ◽  
pp. 169-183 ◽  
Author(s):  
Chia-Chung Sun ◽  
Yan-De Han ◽  
Be-Fu Li ◽  
Qian-Shu Li
Keyword(s):  
Field Theory ◽  
Lie Groups ◽  
Ligand Field ◽  
Ligand Field Theory ◽  
Unitary Transformations

Transport properties of high-Tc oxides in the bipolaron model

1994 ◽  
Vol 235-240 ◽  
pp. 2345-2346 ◽  
Author(s):  
A.S. Alexandrov ◽  
A.M. Bratkovsky ◽  
N.F. Mott
Keyword(s):  
Transport Properties ◽  
High Tc ◽  
Bipolaron Model

scholarly journals Graphical description of unitary transformations on hypergraph states

2017 ◽  
Vol 50 (19) ◽  
pp. 19LT01 ◽  
Author(s):  
Mariami Gachechiladze ◽  
Nikoloz Tsimakuridze ◽  
Otfried Gühne
Keyword(s):  
Unitary Transformations

scholarly journals On Classes of Local Unitary Transformations

2012 ◽  
Vol 19 (02) ◽  
pp. 283-292
Author(s):  
Naihuan Jing
Keyword(s):  
Homogeneous Spaces ◽  
Unitary Groups ◽  
Mixed States ◽  
Density Matrices ◽  
Double Cosets ◽  
Unitary Transformations ◽  
One To One ◽  
Local Unitary Invariance ◽  
Unitary Invariance

We give a one-to-one correspondence between classes of density matrices under local unitary invariance and the double cosets of unitary groups. We show that the interrelationship among classes of local unitary equivalent multi-partite mixed states is independent from the actual values of the eigenvalues and only depends on the multiplicities of the eigenvalues. The interpretation in terms of homogeneous spaces of unitary groups is also discussed.

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