Results 31 to 40 of about 613,352 (286)

Efficient Decomposition of Quantum Gates [PDF]

open access: yesPhysical Review Letters, 2004
Optimal implementation of quantum gates is crucial for designing a quantum computer. We consider the matrix representation of an arbitrary multiqubit gate. By ordering the basis vectors using the Gray code, we construct the quantum circuit which is optimal in the sense of fully controlled single-qubit gates and yet is equivalent with the multiqubit ...
Vartiainen, Juha J.   +2 more
openaire   +3 more sources

Efficient networks for quantum factoring [PDF]

open access: yesPhysical Review A, 1996
56 pages, 22 figures, uses REVTeX ...
Beckman, David   +3 more
openaire   +4 more sources

Efficient Optical Quantum State Engineering [PDF]

open access: yesPhysical Review Letters, 2009
4 pages, 4 ...
McCusker, Kevin T., Kwiat, Paul G.
openaire   +3 more sources

Review of Recent Progress on Advanced Photocathodes for Superconducting RF Guns

open access: yesMicromachines, 2022
As is well known, the quality of the photocathodes is essential for the stability and reliability of photoinjector operations. Especially for superconducting radio frequency photoinjectors (SRF guns), the photocathode represents one of the most critical ...
Rong Xiang, Jana Schaber
doaj   +1 more source

Photoluminescence quantum efficiency of dense silicon nanocrystal ensembles in SiO2 [PDF]

open access: yes, 2006
The photoluminescence decay characteristics of silicon nanocrystals in dense ensembles fabricated by ion implantation into silicon dioxide are observed to vary in proportion to the calculated local density of optical states.
Atwater, H. A.   +4 more
core   +1 more source

Efficient quantum filtering for quantum feedback control [PDF]

open access: yesPhysical Review A, 2015
We discuss an efficient numerical scheme for the recursive filtering of diffusive quantum stochastic master equations. We show that the resultant quantum trajectory is robust and may be used for feedback based on inefficient measurements. The proposed numerical scheme is amenable to approximation, which can be used to further reduce the computational ...
Rouchon, Pierre, Ralph, Jason
openaire   +4 more sources

Enhancing quantum transport in a photonic network using controllable decoherence [PDF]

open access: yes, 2015
Transport phenomena on a quantum scale appear in a variety of systems, ranging from photosynthetic complexes to engineered quantum devices. It has been predicted that the efficiency of quantum transport can be enhanced through dynamic interaction between
Biggerstaff, Devon N.   +9 more
core   +3 more sources

Efficient Quantum Circuits for One-Way Quantum Computing [PDF]

open access: yesPhysical Review Letters, 2009
While Ising-type interactions are ideal for implementing controlled phase flip gates in one-way quantum computing, natural interactions between solid-state qubits are most often described by either the XY or the Heisenberg models. We show an efficient way of generating cluster states directly using either the iSWAP gate for the XY model, or the $\sqrt{\
Tanamoto, Tetsufumi   +3 more
openaire   +3 more sources

Gain and Losses and Room-Temperature Operation in Interband Cascade Lasers

open access: yesIEEE Photonics Journal, 2012
Interband cascade laser structures with a different number of cascades and doping types and levels in the separate confinement and in the hole-injection regions were grown.
Geunmin Ryu   +5 more
doaj   +1 more source

Sorting quantum systems efficiently [PDF]

open access: yesScientific Reports, 2016
AbstractMeasuring the state of a quantum system is a fundamental process in quantum mechanics and plays an essential role in quantum information and quantum technologies. One method to measure a quantum observable is to sort the system in different spatial modes according to the measured value, followed by single-particle detectors on each mode ...
openaire   +3 more sources

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