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6 papers · 2 filters
Shape invariance approach to exact solutions of the Klein-Gordon equation
T. Jana, P. Roy
Using the shape invariance property we obtain exact solutions of the (1+1)dimensional Klein-Gordon equation for certain types of scalar and vector potentials. We also discuss the p…
Causality, Joint measurement and Tsirelson's bound
Sujit K. Choudhary, Guruprasad Kar, Samir Kunkri +1
Tsirelson showed that is the maximum value that CHSH expression can take for quantum-correlations [B. S.Tsirelson, Lett. Math. Phys, 4 (1980) 93]. This bound simply fol…
On the non-existence of a universal Hadamard gate
Preeti Parashar
We establish the non-existence of a universal Hadamard gate for arbitrary unknown qubits, by considering two different principles; namely, no-superluminal signalling and non-increa…
Coherent states of non-Hermitian quantum systems
B. Roy, P. Roy
We use the Gazeau-Klauder formalism to construct coherent states of non-Hermitian quantum systems. In particular we use this formalism to construct coherent state of a PT symmetric…
Winning strategies for pseudo-telepathy games using single non-local box
Samir Kunkri, Guruprasad Kar, Sibasish Ghosh +1
Using a single NL-box, a winning strategy is given for the impossible colouring pseudo-telepathy game for the set of vectors having Kochen-Specker property in four dimension. A suf…
Relation between concurrence and Berry phase of an entangled state of two spin 1/2 particles
B. Basu
We have studied here the influence of the Berry phase generated due to a cyclic evolution of an entangled state of two spin 1/2 particles. It is shown that the measure of formation…