Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Rungta, Pranaw"'
Publikováno v:
Phys. Rev. A. 85, 030303(R) (2012)
We propose an iterative algorithm to simulate the dynamics generated by any $n$-qubit Hamiltonian. The simulation entails decomposing the unitary time evolution operator $U$ (unitary) into a product of different time-step unitaries. The algorithm pro
Externí odkaz:
http://arxiv.org/abs/0911.5467
Autor:
Ajoy, Ashok, Rungta, Pranaw
Publikováno v:
Phys. Rev. A 81, 052334 (2010)
The violation of the Svetlichny's inequality (SI) [Phys. Rev. D, 35, 3066 (1987)] is sufficient but not necessary for genuine tripartite nonlocal correlations. Here we quantify the relationship between tripartite entanglement and the maximum expectat
Externí odkaz:
http://arxiv.org/abs/0901.0368
Publikováno v:
Phys. Rev. A, 78, 052316 (2008)
Augmenting the unitary transformation which generates a quantum walk by a generalized phase gate G is a symmetry for both noisy and noiseless quantum walk on a line, in the sense that it leaves the position probability distribution invariant. However
Externí odkaz:
http://arxiv.org/abs/0803.4453
Autor:
Rungta, Pranaw
We analyze the role played by entanglement in the dynamical evolution of Grover's search algorithm in the space of qubits. We show that the algorithm can be equivalently described as an iterative change of the entanglement between the qubits, which g
Externí odkaz:
http://arxiv.org/abs/0707.1410
We construct a quantum random walk algorithm, based on the Dirac operator instead of the Laplacian. The algorithm explores multiple evolutionary branches by superposition of states, and does not require the coin toss instruction of classical randomis
Externí odkaz:
http://arxiv.org/abs/quant-ph/0506221
Publikováno v:
Phys. Rev. A71 (2005) 032347
Classical randomized algorithms use a coin toss instruction to explore different evolutionary branches of a problem. Quantum algorithms, on the other hand, can explore multiple evolutionary branches by mere superposition of states. Discrete quantum r
Externí odkaz:
http://arxiv.org/abs/quant-ph/0405128
Autor:
Rungta, Pranaw, Caves, Carlton M.
We discuss properties of entanglement measures called I-concurrence and tangle. For a bipartite pure state, I-concurrence and tangle are simply related to the purity of the marginal density operators. The I-concurrence (tangle) of a bipartite mixed s
Externí odkaz:
http://arxiv.org/abs/quant-ph/0208002
Wootters [Phys. Rev. Lett. 80, 2245 (1998)] has given an explicit formula for the entanglement of formation of two qubits in terms of what he calls the concurrence of the joint density operator. Wootters's concurrence is defined with the help of the
Externí odkaz:
http://arxiv.org/abs/quant-ph/0102040
We consider entanglement for quantum states defined in vector spaces over the real numbers. Such real entanglement is different from entanglement in standard quantum mechanics over the complex numbers. The differences provide insight into the nature
Externí odkaz:
http://arxiv.org/abs/quant-ph/0009063
Publikováno v:
IndraStra Global.
Augmenting the unitary transformation which generates a quantum walk by a generalized phase gate G is a symmetry for both noisy and noiseless quantum walk on a line, in the sense that it leaves the position probability distribution invariant. However
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=issn23813652::15523fccf97c36560c3aa60a291a01d2
https://igi.indrastra.com/items/show/206274
https://igi.indrastra.com/items/show/206274
