Zobrazeno 1 - 10
of 161
pro vyhledávání: '"Devi, A R Usha"'
Quantum theory contravenes classical macrorealism by allowing a system to be in a superposition of two or more physically distinct states, producing physical consequences radically different from that of classical physics. We show that a system, upon
Externí odkaz:
http://arxiv.org/abs/2411.02301
Autor:
Sudha, Devi, A. R. Usha, Karthik, B. N., Karthik, H. S., H, Akshata Shenoy, Mallesh, K. S., Rao, A. V. Gopala
The Bloch sphere provides an elegant way of visualizing a qubit. Analogous representation of the simplest composite state of two-qubits has attracted significant attention. Here we present a detailed mathematical analysis of the real-matrix parametri
Externí odkaz:
http://arxiv.org/abs/2402.09258
Extending the mathematical framework of Phys. Rev. A 102, 052419 (2020) we construct Lorentz invariant quantities of pure three-qubit states. This method serves as a bridge between the well-known local unitary (LU) invariants viz. concurrences and th
Externí odkaz:
http://arxiv.org/abs/2310.02900
Publikováno v:
Phys. Rev. A 107, 042207 (2023)
Quantum steering ellipsoid formalism provides a faithful representation of all two-qubit states and helps in obtaining correlation properties of the state through the steering ellipsoid. The steering ellipsoids corresponding to the two-qubit subsyste
Externí odkaz:
http://arxiv.org/abs/2301.01714
Autor:
Anjali, K., Reena, I., Sudha, Divyamani, B. G., Karthik, H. S., Mallesh, K. S., Devi, A. R. Usha
Publikováno v:
Quantum Inf Process 21, 326 (2022)
The quantum steering ellipsoid inscribed inside the Bloch sphere offers an elegant geometric visualization of two-qubit states shared between Alice and Bob. The set of Bloch vectors of Bob's qubit, steered by Alice via all possible local measurements
Externí odkaz:
http://arxiv.org/abs/2208.03024
Publikováno v:
International Journal of Quantum InformationVol. 20, No. 07, 2250023 (2022)
We employ the Margenau-Hill (MH) correspondence rule for associating classical functions with quantum operators to construct quasi-probability mass functions. Using this we obtain the fuzzy one parameter quasi measurement operator (QMO) characterizin
Externí odkaz:
http://arxiv.org/abs/2111.13934
Publikováno v:
Quanta 2021; 10: 34-41
In their seminal paper (Phys. Rev.121, 920 (1961)) Sudarshan, Mathews and Rau investigated properties of the dynamical $A$ and $B$ maps acting on $n$ dimensional quantum systems. Nature of the dynamical maps in open quantum system evolutions has attr
Externí odkaz:
http://arxiv.org/abs/2109.10409
Publikováno v:
Chinese Physics B, Volume 31, Number 6, 060301 (2022)
We show that violation of variance based local sum uncertainty relation (LSUR) for angular momentum operators of a bipartite system, proposed by Hofmann and Takeuchi~[Phys.Rev.A {\bf 68}, 032103 (2003)], reflects entanglement in the equal bipartition
Externí odkaz:
http://arxiv.org/abs/2103.15731
Publikováno v:
International Journal of Theoretical Physics 60 (2021) 1523
We investigate the notion of uncertainty region using the variance based sum uncertainty relation for qubits and qutrits.We compare uncertainty region of the qubit (a 2-level system) with that of the qutrit (3-level system) by considering sum uncerta
Externí odkaz:
http://arxiv.org/abs/2101.11545
Publikováno v:
J.Stat.Mech.(2021) 023209
The celebrated exchange fluctuation theorem -- proposed by Jarzynski and W\'ozcik, (Phys Rev. Lett. 92, 230602 (2004)) for heat exchange between two systems in thermal equilibrium at different temperatures -- is explored here for quantum Gaussian sta
Externí odkaz:
http://arxiv.org/abs/2007.04255