Binary Communication in Entangled Channels
نویسنده
چکیده
We analyze optical binary communication assisted by entanglement and show that: i) ideal entangled channels have smaller error probability than ideal single-mode coherent channels if the photon number of the channel is larger than one; ii) realistic entangled channels with heterodyne receivers have smaller error probability than ideal single-mode coherent channels if the photon number of the channel is larger than a threshold of about five photons.
منابع مشابه
Binary optical communication in single-mode and entangled quantum noisy channels
We address binary optical communication in single-mode and entangled quantum noisy channels. For single-mode we present a systematic comparison between direct photodetection and homodyne detection in realistic conditions, i.e. taking into account the noise that occurs both during the propagation and the detection of the signals. We then consider entangled channels based on twin-beam state of ra...
متن کاملCommunication in non-inertial frames
The dynamics of entangled two qubit pairs in non -inertial frames is investigated. The degree of entanglement is quantified for different classes of travelling states. The accelerated channels are used as quantum channels to teleport unknown accelerated information. The possibility of using the accelerated channels to perform quantum coding is discussed, where it is shown that the coding inform...
متن کاملThe power of entangled quantum channels
All communication channels are at bottom quantum mechanical. Quantum mechanics contributes both obstacles to communication in the form of noise, and opportunities in the use of intrinsically quantum representations for information. This paper investigates the trade-off between power and communication rate for coupled quantum channels. By exploiting quantum correlations such as entanglement, cou...
متن کاملAvoiding disentanglement of multipartite entangled optical beams with a correlated noisy channel
A quantum communication network can be constructed by distributing a multipartite entangled state to space-separated nodes. Entangled optical beams with highest flying speed and measurable brightness can be used as carriers to convey information in quantum communication networks. Losses and noises existing in real communication channels will reduce or even totally destroy entanglement. The phen...
متن کاملTransition of D- Level Quantum Systems Through Quantum Channels with Correlated Noise
Entanglement and entanglement-assisted are useful resources to enhance the mutual information of the Pauli channels, when the noise on consecutive uses of the channel has some partial correlations. In this Paper, we study quantum communication channels in d-dimensional systems and derive the mutual information of the quantum channels for maximally entangled states and product states coding with...
متن کامل