648 research outputs found
Stability of mixed Nash equilibria in symmetric quantum games
In bi-matrix games the Bishop-Cannings theorem of the classical evolutionary
game theory does not permit pure evolutionarily stable strategies (ESSs) when a
mixed ESS exists. We find the necessary form of two-qubit initial quantum
states when a switch-over to a quantum version of the game also changes the
evolutionary stability of a mixed symmetric Nash equilibrium.Comment: 8 pages, no figure, to appear in Communications in Theoretical
Physic
Quantum Cooperative Games
We study two forms of a symmetric cooperative game played by three players,
one classical and other quantum. In its classical form making a coalition gives
advantage to players and they are motivated to do so. However in its quantum
form the advantage is lost and players are left with no motivation to make a
coalition.Comment: Revised in the light of referee's comments. Submitted to Physics
Letters A. LaTex, 9 pages, 1 figure. Parts of this paper are rewritte
Entanlement-Assisted Classical Capacity of Quantum Channels with Correlated Noise
We calculate the entanglement-assisted classical capacity of symmetric and
asymmetric Pauli channels where two consecutive uses of the channels are
correlated. It is evident from our study that in the presence of memory, a
higher amount of classical information is transmitted over quantum channels if
there exists prior entanglement as compared to product and entangled state
coding.Comment: 8 Pages, 2 Figure
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