The science of quantum information has arisen over the last two decades centered on the
manipulation of individual quanta of information, known as quantum bits or qubits. Quantum …

Communication is an integral part of human life. Today, optical pulses are the preferred
information carriers for long-distance communication. The exponential growth in data leads …

Noise is the price to pay when trying to clone or amplify arbitrary quantum states. However,
the quantum noise associated with linear phase-insensitive amplifiers can be avoided by …

Quantum-enhanced measurements can provide information about the properties of a
physical system with sensitivities beyond what is fundamentally possible with conventional …

Quantum key distribution (QKD) utilizes the laws of quantum mechanics to achieve
information-theoretically secure key generation. This field is now approaching the stage of …

Phase-insensitive optical amplification of an unknown quantum state is known to be a
fundamentally noisy operation that inevitably adds noise to the amplified state,,,,. However …

The most efficient modern optical communication is known as coherent communication, and
its standard quantum limit is almost reachable with current technology. Though it has been …

The achievable rate of information transfer in optical communications is determined by the
physical properties of the communication channel, such as the intrinsic channel noise …

We give a theoretical description of a coherently driven opto-mechanical system with a
single added photon. The photon source is modeled as a cavity that initially contains one …

We investigate quantum properties of pulsed light fields point by point in phase space. We
probe the negative region of the Wigner function of a single photon generated by the means …