Results 1 to 10 of about 11,337,371 (328)

Entanglement between two charge qubits taking account the Kerr media

Физика волновых процессов и радиотехнические системы
Background. The need to implement controlled coupling between qubits, which are the logical elements of quantum devices such as quantum computers and quantum networks, requires, along with the use of traditional methods, the development of new, more ...
Eugene K. Bashkirov
doaj   +1 more source

Decoy State Quantum Key Distribution With Modified Coherent State

, 2007
To beat PNS attack, decoy state quantum key distribution (QKD) based on coherent state has been studied widely. We present a decoy state QKD protocol with modified coherent state (MCS).
C. H. Bennett, Fang-Wen Sun, Guang-Can Guo, M. Bourennane, Yi Zhao, Zhen-Qiang Yin, Zheng-Fu Han   +6 more
core   +1 more source

Optimal design and quantum benchmarks for coherent state amplifiers. [PDF]

Physical Review Letters, 2013
We establish the ultimate quantum limits to the amplification of an unknown coherent state, both in the deterministic and probabilistic case, investigating the realistic scenario where the expected photon number is finite.
G. Chiribella, Jinyu Xie
semanticscholar   +1 more source

On Kahlerian Coherent States

, 2012
A reformulation of Rawnsley’s Kahlerian coherent states (in the framework of geometric quantization) is used in order to investigate the interplay between their local and global properties (projective embeddings) and the relationship with Klauder quantization (via path integrals and the introduction of a metric on the classical phase space).
openaire   +4 more sources

Delayed coherent quantum feedback from a scattering theory and a matrix product state perspective [PDF]

, 2017
We study the scattering of photons propagating in a semi-infinite waveguide terminated by a mirror and interacting with a quantum emitter. This paradigm constitutes an example of coherent quantum feedback, where light emitted towards the mirror gets ...
P. Guimond, M. Pletyukhov, H. Pichler, P. Zoller   +3 more
semanticscholar   +1 more source

Schrödinger Cat States in Giant Negative Magnetoresistance of 2D Electron Systems

Applied Sciences
We investigate the effect of giant negative magnetoresistance in ultrahigh-mobility (μ≫107cm2V−1s−1) two-dimensional electron systems. These systems present a dramatic drop in the mangetoresistance at low magnetic fields (B∼0.1 T) and temperatures (T∼0.1
Jesús Iñarrea
doaj   +1 more source

Quantum state transfer and Hadamard gate for coherent states

, 2013
We propose a quantum state transfer from an atomic qubit to a cat-like qubit by means of one degenerate Raman interaction and one Hadamard gate operation for coherent states.
Prudêncio, Thiago
core   +1 more source

Nonclassicalities of the Superposition State of Coherent and Photon-Added-Coherent State

East European Journal of Physics
The nonclassical properties of the hybrid coherent state (HCS), which is the superposition state of the coherent state and photon-added coherent (PAC) state, is investigated analytically.
Sandip Kumar Giri
doaj   +1 more source

Coherent States and Entropy

, 2023
Proc. Geom. Sci. Inf. Conf. (Saint-Malo, France, 2023), Lecture Notes Comp. Sci., 14071, Springer, 2023, pp.
Barron, Tatyana, Kazachek, Alexander
openaire   +2 more sources

On The Information-Theoretical Entropy for Some Quantum Oscillators

Annals of West University of Timisoara: Physics, 2013
The information-theoretical entropy, also called the “classical” entropy, was introduced by Wehrl in terms of the Glauber coherent states (CSs) | z > , i.e. the CSs corresponding to the one-dimensional harmonic oscillator (HO-1D).
Popov Dušan, Pop Nicolina, Șimon Simona   +2 more
doaj   +1 more source