Transfer of gravitational information through a quantum channel
نویسندگان
چکیده
منابع مشابه
Efficient Quantum Information Transfer Through a Uniform Channel
Effective quantum‐state and entanglement transfer can be obtained by inducing a coherent dynamics in quantum wires with homogeneous intrawire interactions. This goal is accomplished by optimally tuning the coupling between the wire endpoints and the two qubits there attached. A general procedure to determine such value is devised, and scaling laws between the optima...
متن کاملInformation transmission through a noisy quantum channel
Noisy quantum channels may be used in many information-carrying applications. We show that different applications may result in different channel capacities. Upper bounds on several of these capacities are proved. These bounds are based on the coherent information, which plays a role in quantum information theory analogous to that played by the mutual information in classical information theory...
متن کاملOptimal strategies for sending information through A quantum channel
Quantum states can be used to encode the information contained in a direction, i.e., in a unit vector. We present the best encoding procedure when the quantum state is made up of N spins (qubits). We find that the quality of this optimal procedure, which we quantify in terms of the fidelity, depends solely on the dimension of the encoding space. We also investigate the use of spatial rotations ...
متن کاملSqueezing quantum information through a classical channel: measuring the "quantumness" of a set of quantum states
We propose to quantify how “quantum” a set of quantum states is. The quantumness of a set is the worst-case difficulty of transmitting the states through a classical communication channel. Potential applications of this measure arise in quantum cryptography, where one might like to use an alphabet of states most sensitive to quantum eavesdropping, and in lab demonstrations of quantum teleportat...
متن کاملClassical information capacity of a quantum channel.
We consider the transmission of classical information over a quantum channel. The channel is deened by an \alphabet" of quantum states, e.g. certain photon polarizations, together with a speciied set of probabilities with which these states must be sent. The Levitin-Kholevo theorem implies that the amount of information transmitted per \letter" cannot be greater than the von Neumann entropy H o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal D
سال: 2013
ISSN: 1434-6060,1434-6079
DOI: 10.1140/epjd/e2013-40146-x