620 Hits in 4.3 sec

Efficient entanglement concentration for arbitrary less-entangled NOON state assisted with single photon [article]

Lan Zhou, Yu-Bo Sheng
2012 arXiv   pre-print
We put forward two efficient entanglement concentration protocols (ECPs) for distilling the maximally entangled NOON state from arbitrary less-entangled NOON state with only an auxiliary single photon.  ...  In summary, we put forward two efficient ECPs for distilling the maximally entangled N-photon NOON state from arbitrary less-entangled NOON state.  ...  DISCUSSION AND SUMMARY In the paper, we presented two efficient ECPs for distilling the maximally entangled N-photon NOON state from arbitrary less-entangled NOON state.  ... 
arXiv:1209.1795v1 fatcat:vygu4cdbjvgf5o34t7gvz7j3hy

Creating and concentrating quantum resource states in noisy environments using a quantum neural network

Tanjung Krisnanda, Sanjib Ghosh, Tomasz Paterek, Timothy C.H. Liew
2021 Neural Networks  
We explicitly show that our method is robust and can be utilized to create almost perfect maximally entangled, NOON, W, cluster, and discorded states.  ...  Finally, in very noisy systems, where noise is comparable to the driving strength, we show how to concentrate entanglement by mixing more states in a larger network.  ...  Similar to the maximally entangled states, NOON states are defined for a bipartite system, and read |Ψ NOON N = 1 √ 2 (|N 0 + |0N ), (5) up to an arbitrary relative phase, where N is the number of excitations  ... 
doi:10.1016/j.neunet.2021.01.003 pmid:33486293 fatcat:s2tkoq2nkrbb3lqvzmk4vdn6wi

Quantum Entanglement Concentration Based on Nonlinear Optics for Quantum Communications

Yu-Bo Sheng, Lan Zhou
2013 Entropy  
One is to concentrate the partially entangled Bell-state, and the other is to concentrate the partially entangled W state.  ...  Entanglement concentration is to distill maximally entangled states from pure partially entangled states.  ...  In this way, we have proven that our ECP can be used repeatedly to further concentrate arbitrary N-photon NOON states.  ... 
doi:10.3390/e15051776 fatcat:26ojefelrjgtlonngy3jnpszlu

Protocols and quantum circuits for implementing entanglement concentration in cat state, GHZ-like state and nine families of 4-qubit entangled states

Chitra Shukla, Anindita Banerjee, Anirban Pathak
2015 Quantum Information Processing  
Three entanglement concentration protocols (ECPs) are proposed.  ...  The last two ECPs are designed for the creation of maximally entangled (n+1)-qubit state 1/√(2)(|Ψ_0〉|0〉+|Ψ_1〉|1〉) from the partially entangled (n+1)-qubit normalized state α|Ψ_0〉|0〉+β|Ψ_1〉|1〉, where 〈  ...  have proposed an ECP for partially entangled arbitrary W state [19] .  ... 
doi:10.1007/s11128-015-0948-6 fatcat:t5xzbc6qtvbxnagxkplz6kxbvi

Advantage in two-way communication using non-classical states of light [article]

Bohnishikha Ghosh and Amit Mukherjee and S. Aravinda
2019 arXiv   pre-print
For the special cases of the even-coherent, odd-coherent, and squeezed vacuum NOON states, we establish that the advantage is also maximal.  ...  to as a generalized NOON state), regardless of the average photon number of the single mode state.  ...  performed with high efficiency) of atom-light entangled states [41] .  ... 
arXiv:1904.04596v2 fatcat:vvhnflcaxracnnss4ol6l4fwni

Adaptive Measurements in the Optical Quantum Information Laboratory

H.M. Wiseman, D.W. Berry, S.D. Bartlett, B.L. Higgins, G.J. Pryde
2009 IEEE Journal of Selected Topics in Quantum Electronics  
For example: they allow discrimination of nonorthogonal states with a probability of error equal to the Helstrom bound; they allow measurement of the phase of a quantum oscillator with accuracy approaching  ...  We discuss each of these examples, and their implementation in the laboratory, but concentrate upon the last, which was published most recently [Higgins et al., Nature vol. 450, p. 393, 2007].  ...  Note that this entangled state differs from the NOON state, which has the form |N, 0 S + |0, N S in this notation.  ... 
doi:10.1109/jstqe.2009.2020810 fatcat:qh3khnlccjf3bjv7zkeq6zdzpe

Quantum metrology and its application in biology [article]

Michael A. Taylor, Warwick P. Bowen
2015 arXiv   pre-print
Our understanding of quantum mechanics has already enabled important applications in biology, including positron emission tomography (PET) with entangled photons, magnetic resonance imaging (MRI) using  ...  Here, we review quantum metrology from this biological context, focusing on optical techniques due to their particular relevance for biological imaging, sensing, and stimulation.  ...  It is interesting to ask what optical efficiency is required for NOON state-based measurements to exceed the standard quantum limit, i.e., when is E NOON > 1?  ... 
arXiv:1409.0950v2 fatcat:aafbiqjfq5cu3b3pn54oaxgnhm

Semiconductor quantum dots as an ideal source of polarization-entangled photon pairs on-demand: a review

Daniel Huber, Marcus Reindl, Johannes Aberl, Armando Rastelli, Rinaldo Trotta
2018 Journal of Optics  
More than 80 years passed since the first publication on entangled quantum states. In this period of time the concept of spookily interacting quantum states became an emerging field of science.  ...  These novel concepts have not yet come out of the experimental stage, mostly because of the lack of suitable, deterministic sources of entangled quantum states.  ...  NOON-state generation when relying on pure single photon sources [13] .  ... 
doi:10.1088/2040-8986/aac4c4 fatcat:6fnmo4jnpjhq3baslwrgiokcn4

On the efficiency of quantum lithography

Christian Kothe, Gunnar Björk, Shuichiro Inoue, Mohamed Bourennane
2011 New Journal of Physics  
However, last year an experiment was performed which gives different outcomes for the two theories.  ...  We comment on the experiment and show that the model that fits the data unfortunately indicates that the trade-off between resolution and efficiency in quantum lithography is very unfavourable.  ...  The work was supported by the Swedish Research Council (VR), by the Swedish Foundation for International Cooperation in Research and Higher Education (STINT), and by the Knut and Alice Wallenberg Foundation  ... 
doi:10.1088/1367-2630/13/4/043028 fatcat:5tmsvvil65erret4keoqkiu7va

Prospective applications of optical quantum memories

Félix Bussières, Nicolas Sangouard, Mikael Afzelius, Hugues de Riedmatten, Christoph Simon, Wolfgang Tittel
2013 Journal of Modern Optics  
This review highlights that optical quantum memories have become essential for the development of optical quantum information processing.  ...  An optical quantum memory can be broadly defined as a system capable of storing a useful quantum state through interaction with light at optical frequencies.  ...  Acknowledgements We thank Almut Beige, Christoph Clausen, Nicolas Gisin, Pavel Sekatski, Nuala Timoney and Philipp Treutlein for stimulating discussions and for careful reading of the manuscript.  ... 
doi:10.1080/09500340.2013.856482 fatcat:jlhs62yu6fbbtb6wwiad2qr7bm

Quantum memories

C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kröll, J. H. Müller, J. Nunn, E. S. Polzik (+12 others)
2010 European Physical Journal D : Atomic, Molecular and Optical Physics  
We begin with a brief overview over different applications for quantum memories and different types of quantum memories.  ...  We discuss the most important criteria for assessing quantum memory performance and the most important physical requirements.  ...  Thus the more broadening that is added, the less efficient the storage efficiency becomes.  ... 
doi:10.1140/epjd/e2010-00103-y fatcat:xscscp3lerb3nhp3a34em6qwum

Characterizations and quantifications of macroscopic quantumness and its implementations using optical fields

Hyunseok Jeong, Minsu Kang, Hyukjoon Kwon
2015 Optics Communications  
for experimental implementations within recent research topics.  ...  We present a review and discussions on characterizations and quantifications of macroscopic quantum states as well as their implementations and applications in optical systems.  ...  Schemes for entanglement purification for mixed ECSs [106, 107] and concentration for pure ECSs [106] were investigated using Bell-state measurements [106] .  ... 
doi:10.1016/j.optcom.2014.07.012 fatcat:ehlgugfomrgr7ko2eanz6bhvom

Towards practical quantum metrology with photon counting

Jonathan CF Matthews, Xiao-Qi Zhou, Hugo Cable, Peter J Shadbolt, Dylan J Saunders, Gabriel A Durkin, Geoff J Pryde, Jeremy L O'Brien
2016 npj Quantum Information  
generating multiple photons that we show requires no further fundamental state engineering for use in practical quantum metrology.  ...  demonstrated the key enabling principles of a practical, loss-tolerant approach to photonic quantum metrology designed to harness all multi-photon components in spontaneous parametric downconversion---a method for  ...  objective of quantum metrology has been to engineer instances of 'NOON' states, 2, [8] [9] [10] [11] [12] which are path-entangled states of N photons across two modes 1 O2 N j i 0 j i þ 0 j i N j i  ... 
doi:10.1038/npjqi.2016.23 fatcat:xdwkha5vyncwnihvzavyyq62om

On the dissipative dynamics of entangled states in coupled-cavity quantumelectrodynamics arrays

Imran Mirza, Adriana Cruz
2021 Journal of the Optical Society of America. B, Optical physics  
We present a general theoretical formalism valid for any arbitrary numbers of QEs, RRs, and N number in the N00N state for both schemes.  ...  We examine the dissipative dynamics of N00N states with an arbitrary photon number N in two architectures of fiber-coupled optical ring resonators (RRs) interacting with two-level quantum emitters.  ...  “Efficient scheme for generation of photonic noon states [27] B. Q. Baragiola, R. L. Cook, A. M. Brańczyk, and in circuit qed,” Optics Letters, vol. 40, no. 10, pp. 2221– J.  ... 
doi:10.1364/josab.441224 fatcat:slbfrpz3pfcm3dfeyc646jru2u

A quantum-enhanced wide-field phase imager [article]

Robin Camphausen
2021 arXiv   pre-print
Leveraging the latest advances in single photon avalanche diode array cameras and multi-photon detection techniques, here we introduce a super-sensitive phase imager, which uses space-polarization hyper-entanglement  ...  Acknowledgements We thank Alexander Demuth for help with the design of components for the entangled photon source and for helpful discussions.  ...  We thank Sebastian Ecker for help with setting up the entangled photon source.  ... 
arXiv:2105.11394v1 fatcat:r5rl7se5mbcjfommeb3isolzkq
« Previous Showing results 1 — 15 out of 620 results