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of 26
pro vyhledávání: '"Kumar, C S Sudheer"'
Quantum control of large spin registers is crucial for many applications ranging from spectroscopy to quantum information. A key factor that determines the efficiency of a register for implementing a given information processing task is its network t
Externí odkaz:
http://arxiv.org/abs/2102.05203
Autor:
Kumar, C S Sudheer, Sen, Ujjwal
The strong law of large numbers asserts that experimentally obtained mean values, in the limit of number of repetitions of the experiment going to infinity, converges almost surely to the theoretical predictions which are based on a priori assumed co
Externí odkaz:
http://arxiv.org/abs/2004.14816
Different ensembles of the same density matrix are indistinguishable within the modern Kolmogorov probability measure theory of quantum random phenomena. We find that changing the framework from the Kolmogorov one to a frequentist-inspired theory of
Externí odkaz:
http://arxiv.org/abs/1903.12096
Autor:
Kumar, C. S. Sudheer, Mahesh, T. S.
Publikováno v:
Eur. Phys. J. Plus (2018) 133: 460
Given a quantum state with an unknown parameter, the Quantum Fisher Information (QFI) is a measure of the amount of information that an observable can extract about the parameter. QFI also quantifies the maximum achievable precision in estimating the
Externí odkaz:
http://arxiv.org/abs/1801.01396
Autor:
Kumar, C S Sudheer
Publikováno v:
Pramana-J. Phys. (2019) 93:67
Here we show that, if we insert context dependent unitary evolutions (which can be achieved via post selection) into spatial (i.e., normal) Bell-CHSH test, then it is possible to violate space-time Bell-CHSH inequality maximally (i.e., up to $4$). Ho
Externí odkaz:
http://arxiv.org/abs/1702.05479
Publikováno v:
Lectures on General Quantum Correlations and their Applications, Part of the series Quantum Science and Technology, Springer International Publishing (2017), pp 499--516
In conventional NMR experiments, the Zeeman energy gaps of the nuclear spin ensembles are much lower than their thermal energies, and accordingly exhibit tiny polarizations. Generally such low-purity quantum states are devoid of quantum entanglement.
Externí odkaz:
http://arxiv.org/abs/1608.06579
Publikováno v:
Physics Letters A 380 (2016) 3612-3616
Measurement of an observable on a quantum system involves a probabilistic collapse of the quantum state and a corresponding measurement outcome. L\"uders and von Neumann state update rules attempt to describe the above phenomenological observations.
Externí odkaz:
http://arxiv.org/abs/1607.05723
Autor:
Mahesh, T. S., Shukla, Abhishek, Hegde, Swathi S., Kumar, C. S. Sudheer, Katiyar, Hemant, Joshi, Sharad, Rao, K. R. Koteswara
Quantum ensembles form easily accessible architectures for studying various phenomena in quantum physics, quantum information science, and spectroscopy. Here we review some recent protocols for measurements in quantum ensembles by utilizing ancillary
Externí odkaz:
http://arxiv.org/abs/1509.04506
Physical potentials are routinely approximated to harmonic potentials so as to analytically solve the system dynamics. Often it is important to know when a quantum harmonic oscillator (QHO) behaves quantum mechanically and when classically. Recently
Externí odkaz:
http://arxiv.org/abs/1503.05883
Autor:
Kumar, C. S. Sudheer
Here we show that, in principle it is possible to clone (measure) a single arbitrary unknown quantum state of a spin-$\frac{1}{2}$ particle (an electron) with arbitrary precision and with success probability tending to one, using protective measureme
Externí odkaz:
http://arxiv.org/abs/1503.04547