scholarly journals Quantum computation and quantum-state engineering driven by dissipation

2009 ◽  
Vol 5 (9) ◽  
pp. 633-636 ◽  
Author(s):  
Frank Verstraete ◽  
Michael M. Wolf ◽  
J. Ignacio Cirac
Keyword(s):  
Quantum Computation ◽  
Quantum State ◽  
Quantum State Engineering

EFFICIENT ALGORITHM FOR INITIALIZING AMPLITUDE DISTRIBUTION OF A QUANTUM REGISTER

2001 ◽  
Vol 15 (27) ◽  
pp. 1259-1264 ◽  
Author(s):  
M. ANDRECUT ◽  
M. K. ALI
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Computation ◽  
Quantum State ◽  
Efficient Algorithm ◽  
Quantum Information Processing ◽  
Amplitude Distribution ◽  
Quantum Register

The preparation of a quantum register in an arbitrary superposed quantum state is an important operation for quantum computation and quantum information processing. Here, we present an efficient algorithm which requires a polynomial number of elementary operations for initializing the amplitude distribution of a quantum register.

QUANTUM STATE ENGINEERING BASED ON ELECTROMAGNETIC ANALOGIES AND NUMERICAL METHODS FOR SEMICONDUCTOR INTERSUBBAND LASERS

1998 ◽  
Vol 09 (04) ◽  
pp. 1235-1264 ◽  
Author(s):  
EMMANUEL ANEMOGIANNIS ◽  
ELIAS N. GLYTSIS ◽  
THOMAS K. GAYLORD
Keyword(s):  
Numerical Methods ◽  
Quantum Well ◽  
Semiconductor Lasers ◽  
Quantum State ◽  
Electromagnetic Optics ◽  
Quantum State Engineering ◽  
Systematic Effort ◽  
Mature Field

The design of semiconductor intersubband lasers using quantum state engineering based on electromagnetic analogies is a relatively new area. There has been little systematic effort in this direction as yet. The use of these analogies allows laser researchers to apply tools and methodologies found in the mature field of electromagnetic optics. The purpose of this paper is to describe the procedures by which intersubband quantum-well semiconductor lasers (or detectores) may be designed using these methodologies.

Two-photon quantum state engineering in nonlinear photonic nanowires

2014 ◽  
Vol 31 (7) ◽  
pp. 1581 ◽  
Author(s):  
Dongpeng Kang ◽  
Arthur Pang ◽  
Yuxiang Zhao ◽  
Amr S. Helmy
Keyword(s):  
Quantum State ◽  
Quantum State Engineering ◽  
Two Photon

scholarly journals Multiphoton quantum-state engineering using conditional measurements

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Omar S. Magaña-Loaiza ◽  
Roberto de J. León-Montiel ◽  
Armando Perez-Leija ◽  
Alfred B. U’Ren ◽  
Chenglong You ◽  
...  
Keyword(s):  
Quantum State ◽  
Light Sources ◽  
Physical Processes ◽  
Quantum State Engineering ◽  
Fundamental Properties ◽  
Statistical Fluctuations ◽  
Squeezed Vacuum ◽  
Vacuum States ◽  
Quantum Phenomena ◽  
Fundamental Physical

Abstract The quantum theory of electromagnetic radiation predicts characteristic statistical fluctuations for light sources as diverse as sunlight, laser radiation, and molecule fluorescence. Indeed, these underlying statistical fluctuations of light are associated with the fundamental physical processes behind their generation. In this contribution, we experimentally demonstrate that the manipulation of the quantum electromagnetic fluctuations of two-mode squeezed vacuum states leads to a family of quantum-correlated multiphoton states with tunable mean photon numbers and degree of correlation. Our technique relies on the use of conditional measurements to engineer the excitation mode of the field through the simultaneous subtraction of photons from two-mode squeezed vacuum states. The experimental generation of nonclassical multiphoton states by means of photon subtraction unveils novel mechanisms to control fundamental properties of light. As a remarkable example, we demonstrate the engineering of a quantum state of light with up to ten photons, exhibiting nearly Poissonian photon statistics, that constitutes an important step towards the generation of entangled lasers. Our technique enables a robust protocol to prepare quantum states with multiple photons in high-dimensional spaces and, as such, it constitutes a novel platform for exploring quantum phenomena in mesoscopic systems.

Single-Step Traveling-Wave Quantum State Engineering in the Coherent State Representation

2018 ◽  
Vol 39 (5) ◽  
pp. 448-455
Author(s):  
Gabor Mogyorosi ◽  
Emese Molnar ◽  
Matyas Mechler ◽  
Peter Adam
Keyword(s):  
Coherent State ◽  
Quantum State ◽  
Traveling Wave ◽  
Single Step ◽  
State Representation ◽  
Quantum State Engineering
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