Zobrazeno 1 - 10
of 345
pro vyhledávání: '"Grassl, M."'
Autor:
Barbiero, G., Wang, H., Graßl, M., Gröbmeyer, S., Kimbaras, D., Neuhaus, M., Pervak, V., Nubbemeyer, T., Fattahi, H., Kling, M. F.
We demonstrate an efficient hybrid-scheme for nonlinear pulse compression of high-power thin-disk oscillator pulses to the sub-10 fs regime. The output of a home-built, 16 MHz, 84 W, 220 fs Yb:YAG thin-disk oscillator at 1030 nm is first compressed t
Externí odkaz:
http://arxiv.org/abs/2108.06244
Publikováno v:
Quantum Information Processing (2018) 17:286
We discuss the tomography of $N$-qubit states using collective measurements. The method is exact for symmetric states, whereas for not completely symmetric states the information accessible can be arranged as a mixture of irreducible SU(2) blocks. Fo
Externí odkaz:
http://arxiv.org/abs/1809.04816
Autor:
Bouchard, F., de la Hoz, P., Bjork, G., Boyd, R. W., Grassl, M., Hradil, Z., Karimi, E., Klimov, A. B., Leuchs, G., Rehacek, J., Sanchez-Soto, L. L.
Publikováno v:
Optica, vol. 4, no. 11, pp. 1429-1432 (2017)
Quantum metrology allows for a tremendous boost in the accuracy of measurement of diverse physical parameters. The estimation of a rotation constitutes a remarkable example of this quantum-enhanced precision. The recently introduced Kings of Quantumn
Externí odkaz:
http://arxiv.org/abs/1612.06804
Publikováno v:
Phys. Rev. A 95, 012118 (2017)
Two observables are called complementary if preparing a physical object in an eigenstate of one of them yields a completely random result in a measurement of the other. We investigate small sets of complementary observables that cannot be extended by
Externí odkaz:
http://arxiv.org/abs/1611.08962
Publikováno v:
Physical Review A 92, 031801(R) (2015)
The characterization of quantum polarization of light requires knowledge of all the moments of the Stokes variables, which are appropriately encoded in the multipole expansion of the density matrix. We look into the cumulative distribution of those m
Externí odkaz:
http://arxiv.org/abs/1503.03446
Autor:
Scott, A. J., Grassl, M.
Publikováno v:
J. Math. Phys. 51, 042203 (2010)
We report on a new computer study into the existence of d^2 equiangular lines in d complex dimensions. Such maximal complex projective codes are conjectured to exist in all finite dimensions and are the underlying mathematical objects defining symmet
Externí odkaz:
http://arxiv.org/abs/0910.5784
Publikováno v:
Phys. Scr. T140, 014031 (2010)
We offer a piece of evidence that the problems of finding the number of mutually unbiased bases (MUB) and mutually orthogonal Latin squares (MOLS) might not be equivalent. We study a particular procedure which has been shown to relate the two problem
Externí odkaz:
http://arxiv.org/abs/0910.1439
Publikováno v:
Physical Review A, vol. 68, no. 1, July 2003, 012316
The recently introduced detected-jump correcting quantum codes are capable of stabilizing qubit-systems against spontaneous decay processes arising from couplings to statistically independent reservoirs. These embedded quantum codes exploit classical
Externí odkaz:
http://arxiv.org/abs/quant-ph/0208140
Publikováno v:
Phys. Rev. Letters, vol. 86, no. 19, May 7, 2001, pp. 4402-4405
A new class of error-correcting quantum codes is introduced capable of stabilizing qubits against spontaneous decay arising from couplings to statistically independent reservoirs. These quantum codes are based on the idea of using an embedded quantum
Externí odkaz:
http://arxiv.org/abs/quant-ph/0103042
Publikováno v:
Phys.Rev.A60:881,1999
We study the physical resources required to implement general quantum operations, and provide new bounds on the minimum possible size which an environment must be in order to perform certain quantum operations. We prove that contrary to a previous co
Externí odkaz:
http://arxiv.org/abs/quant-ph/9806095