scholarly journals Scalable Generation of Graph-State Entanglement through Realistic Linear Optics

2006 ◽  
Author(s):  
T. P. Bodiya ◽  
L.-M. Duan
Keyword(s):  
Linear Optics ◽  
Graph State

GENERATION OF GRAPH-STATE ENTANGLEMENT WITH ATOMIC ENSEMBLES VIA THE DIPOLE BLOCKADE MECHANISM

2011 ◽  
Vol 09 (01) ◽  
pp. 547-554
Author(s):  
HONG XIE ◽  
MEI-XIANG CHEN
Keyword(s):  
Dipole Interaction ◽  
Entangled State ◽  
Linear Optics ◽  
Atomic Ensembles ◽  
Graph State ◽  
Single Spin ◽  
Generating Graph ◽  
Spin Excitations ◽  
Dipole Blockade ◽  
The Many

A scheme is proposed for generating graph-state entanglement between many atomic ensembles. In this scheme, the photons are transferred from the single-"spin" excitations of the atomic ensembles via the dipole blockade mechanism, which act as ancillary qubits and interfere with each other on linear optics apparatus. The quantum-entangled state of the atomic ensembles can be obtained under the conditional detection of the photons. Since the single-"spin" excitations can be deterministically created via strong long-range dipole–dipole interaction and the transferred efficiency is enhanced by the many-atom interference effects, our scheme can work with a high probability of success.

Implementation of a single-photon fully quantum router with cavity QED and linear optics

2021 ◽  
Vol 53 (1) ◽  
Author(s):  
Cong Cao ◽  
Yu-Hong Han ◽  
Xin Yi ◽  
Pan-Pan Yin ◽  
Xiu-Yu Zhang ◽  
...  
Keyword(s):  
Cavity Qed ◽  
Single Photon ◽  
Linear Optics ◽  
Quantum Router

scholarly journals Linear optics control of sideband instability for improved free-electron laser spectral brightness

2020 ◽  
Vol 23 (11) ◽  
Author(s):  
G. Perosa ◽  
E. M. Allaria ◽  
L. Badano ◽  
N. Bruchon ◽  
P. Cinquegrana ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Spectral Brightness ◽  
Linear Optics

Modified graph-state codes for single-node recovery in quantum distributed storage

2020 ◽  
Vol 102 (6) ◽  
Author(s):  
Priya J. Nadkarni ◽  
Ankur Raina ◽  
Shayan Srinivasa Garani
Keyword(s):  
Distributed Storage ◽  
Graph State ◽  
Single Node

scholarly journals A Unified Mathematical Formalism for First to Third Order Dielectric Response of Matter: Application to Surface-Specific Two-Colour Vibrational Optical Spectroscopy

Symmetry ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 153 ◽  
Author(s):  
Christophe Humbert ◽  
Thomas Noblet
Keyword(s):  
Dielectric Response ◽  
Structure And Properties ◽  
Linear Optics ◽  
Third Order ◽  
Mathematical Functions ◽  
Sum Frequency ◽  
Non Linear Optics ◽  
Non Linear ◽  
Light Excitation

To take advantage of the singular properties of matter, as well as to characterize it, we need to interact with it. The role of optical spectroscopies is to enable us to demonstrate the existence of physical objects by observing their response to light excitation. The ability of spectroscopy to reveal the structure and properties of matter then relies on mathematical functions called optical (or dielectric) response functions. Technically, these are tensor Green’s functions, and not scalar functions. The complexity of this tensor formalism sometimes leads to confusion within some articles and books. Here, we do clarify this formalism by introducing the physical foundations of linear and non-linear spectroscopies as simple and rigorous as possible. We dwell on both the mathematical and experimental aspects, examining extinction, infrared, Raman and sum-frequency generation spectroscopies. In this review, we thus give a personal presentation with the aim of offering the reader a coherent vision of linear and non-linear optics, and to remove the ambiguities that we have encountered in reference books and articles.

scholarly journals ESTIMATING PURITY AND ENTROPY IN STABILIZER STATE EXPERIMENTS

2010 ◽  
Vol 08 (01n02) ◽  
pp. 325-335 ◽  
Author(s):  
HARALD WUNDERLICH ◽  
MARTIN B. PLENIO
Keyword(s):  
Quantum Information ◽  
Measurement Data ◽  
Simulated Data ◽  
The State ◽  
Graph State ◽  
Graph States ◽  
Underlying Graph ◽  
Moderate Number ◽  
Full State ◽  
State Tomography

Many experiments in quantum information aim at creating graph states. Quantifying the purity of an experimentally achieved graph state could in principle be accomplished using full-state tomography. This method requires a number of measurement settings growing exponentially with the number of constituents involved. Thus, full-state tomography becomes experimentally infeasible even for a moderate number of qubits. In this paper, we present a method to estimate the purity of experimentally achieved graph states with simple measurements. The observables we consider are the stabilizers of the underlying graph. Then, we formulate the problem as: "What is the state with the least purity that is compatible with the measurement data?" We solve this problem analytically and compare the obtained bounds with results from full-state tomography for simulated data.

scholarly journals Improving single photon sources via linear optics and photodetection

2004 ◽  
Author(s):  
Dominic W. Berry ◽  
Stefan Scheel ◽  
Casey R. Myers ◽  
Barry C. Sanders ◽  
Peter L. Knight ◽  
...  
Keyword(s):  
Single Photon ◽  
Linear Optics ◽  
Photon Sources
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