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- S.N. Bose National Centre for Basic SciencesIN60 papers
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11 papers · 2 filters
Nonlocality without inequality for almost all two-qubit entangled state based on Cabello's nonlocality argument
Samir Kunkri, Sujit K. Choudhary, Ali Ahanj +1
Here we deal with a nonlocality argument proposed by Cabello which is more general than Hardy's nonlocality argument but still maximally entangled states do not respond. However, f…
dimensional Dirac equation with non Hermitian interaction
A. Sinha, P. Roy
We study dimensional Dirac equation with non Hermitian interactions, but real energies. In particular, we analyze the pseudoscalar and scalar interactions in detail, illust…
Qubit rotation and Berry Phase
D. Banerjee, P. Bandyopadhyay
A quantized fermion can be represented by a scalar particle encircling a magnetic flux line. It has the spinor structure which can be constructed from quantum gates and qubits. We…
Pseudo-Hermitian versus Hermitian position-dependent-mass Hamiltonians in a perturbative framework
B. Bagchi, C. Quesne, R. Roychoudhury
We formulate a systematic algorithm for constructing a whole class of Hermitian position-dependent-mass Hamiltonians which, to lowest order of perturbation theory, allow a descript…
Pseudo-Hermiticity and some consequences of a generalized quantum condition
B. Bagchi, C. Quesne, R. Roychoudhury
We exploit the hidden symmetry structure of a recently proposed non-Hermitian Hamiltonian and of its Hermitian equivalent one. This sheds new light on the pseudo-Hermitian characte…
No-Flipping as a consequence of No-Signalling and Non-increase of Entanglement under LOCC
Indrani Chattopadhyay, Sujit K. Choudhary, Guruprasad Kar +2
Non existence of Universal NOT gate for arbitrary quantum mechanical states is a fundamental constraint on the allowed operations performed on physical systems. The largest set of…