Results 41 to 50 of about 50 (50)
Quantum Speedup by Quantum Annealing
Physical Review Letters, 2012 We study the glued-trees problem of Childs et. al. in the adiabatic model of quantum computing and provide an annealing schedule to solve an oracular problem exponentially faster than classically possible. The Hamiltonians involved in the quantum annealing do not suffer from the so-called sign problem.
Rolando D. Somma +2 more
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Quantum Dissipation and Quantum Groups [PDF]
Annals of Physics, 1995 We discuss the r le of quantum deformation of Weyl-Heisenberg algebra in dissipative systems and finite temperature systems. We express the time evolution generator of the damped harmonic oscillator and the generator of thermal Bogolubov transformations in terms of operators of the quantum Weyl-Heisenberg algebra. The quantum parameter acts as a label
Giuseppe Vitiello, Alfredo Iorio
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Quantum computers and quantum coherence [PDF]
Journal of Magnetism and Magnetic Materials, 1999 13 pages, latex, one eps figure. Prepared for special issue of J. Mag. Magn. Matl., "Magnetism beyond 2000".
DiVincenzo, D. P., Loss, D.
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Quantum Dissipation and Quantum Noise [PDF]
Annals of Physics, 1995 We derive the exact action for a damped mechanical system ( and the special case of the linear oscillator) from the path integral formulation of the quantum Brownian motion problem developed by Schwinger and by Feynman and Vernon. The doubling of the phase-space degrees of freedom for dissipative systems and thermal field theories is discussed and the ...
Giuseppe Vitiello +2 more
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Quantum geometry and quantum algorithms [PDF]
Journal of Physics A: Mathematical and Theoretical, 2007 Submitted to J. Phys. A: Math-Gen, for the special issue ``The Quantum Universe'' in honor of G.
Garnerone Silvano +2 more
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Quantum computation with quantum dots [PDF]
Physical Review A, 1998 We propose a new implementation of a universal set of one- and two-qubit gates for quantum computation using the spin states of coupled single-electron quantum dots. Desired operations are effected by the gating of the tunneling barrier between neighboring dots.
Daniel Loss +3 more
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ARE QUANTUM CORRELATIONS GENUINELY QUANTUM? [PDF]
International Journal of Modern Physics B, 2012 It is shown that the probabilities for the spin singlet can be reproduced through classical resources, with no communication between the distant parties, by using merely shared (pseudo-)randomness. If the parties are conscious beings aware of both the hidden-variables and the random mechanism, then one has a conspiracy.
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Quantum Simulators and Quantum Repeaters
Fortschritte der Physik, 2000 It is shown that a photon from a non-maximal singlet, obtained by a controlled entanglement of two downconverted photon pairs, can be entangled with a photon from another such singlet. As a result the other photons from the singlets appear in a singlet state with an event probability arbitrary close to one.
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Quantum Control of Quantum Solitons
Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF), 2018Controlling quantum nonlinear optical processes is a major challenge in optics. We apply novel quantum control techniques to optical solitons. By phase-space methods, we show that a proper control function alters the soliton evolution.
Marcucci G. +3 more
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