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- Arun Kumar Pati
- 1998

We obtain the adiabatic Berry phase by defining a generalised gauge potential whose line integral gives the phase holonomy for arbitrary evolutions of parameters. Keeping in mind that for classical integrable systems it is hardly clear how to obtain open-path Hannay angle, we establish a connection between the open-path Berry phase and Hannay angle by using… (More)

- Arun Kumar Pati
- 1998

We propose the Aharonov-Casher (AC) effect for four entangled spin-half particles carrying magnetic moments in the presence of impenetrable line charge. The four particle state undergoes AC phase shift in two causually disconnected region which can show up in the correlations between different spin states of distant particles. This correlation can violate… (More)

Coherence of a quantum state intrinsically depends on the choice of the reference basis. A natural question to ask is the following: if we use two or more incompatible reference bases, can there be some trade-off relation between the coherence measures in different reference bases? We show that the quantum coherence of a state as quantified by the relative… (More)

We consider W-states and generalized W-states for n-qubit systems. We obtain conditions to use these states as quantum resources to teleport unknown states. Only a limited class of multiqubit states can be teleported. For one-qubit states, we use protocols which are simple extensions of the conventional teleportation protocol. We also show that these… (More)

- Chiranjib Mukhopadhyay, Namrata Shukla, Arun Kumar Pati
- ArXiv
- 2015

We formulate three new error disturbance relations, one of which is free from explicit dependence upon intrinsic fluctuations of observables. The first error-disturbance relation is tighter than the one provided by the Branciard inequality and the Ozawa inequality for some initial states. Other two error disturbance relations provide a tighter bound to… (More)

- Shrobona Bagchi, Arun Kumar Pati
- ArXiv
- 2015

For bipartite pure and mixed quantum states, in addition to the quantum mutual information, there is another measure of total correlation, namely, the entanglement of purification. We study the monogamy, polygamy, and additivity properties of the entanglement of purification for pure and mixed states. In this paper, we show that, in contrast to the quantum… (More)

- Arun Kumar Pati, Biswajit Pradhan, Pankaj Agrawal
- Quantum Information Processing
- 2012

- Arun Kumar Pati, Pankaj Agrawal
- Quantum Information Processing
- 2012

- Arun K Pati, Mamata Sahoo, Biswajit Pradhan
- Physical review. E, Statistical, nonlinear, and…
- 2010

The universal quantum work relation connects a functional of an arbitrary observable averaged over the forward process to the free-energy difference and another functional averaged over the time-reversed process. Here, we ask the question if the system is driven out of equilibrium by a different Hamiltonian rather than the original one during the forward… (More)

- Arun K. Pati
- 2008

Quantum operations represented by completely positive maps encompass many of the physical processes and have been very powerful in describing quantum computation and information processing tasks. We introduce the notion of relative phase change for a quantum system undergoing quantum operation. We find that the relative phase shift of a system not only… (More)