Conclusive and arbitrarily perfect quantum-state transfer using parallel spin-chain channels
نویسندگان
چکیده
منابع مشابه
Perfect state transfer in quantum spin networks.
We propose a class of qubit networks that admit the perfect state transfer of any quantum state in a fixed period of time. Unlike many other schemes for quantum computation and communication, these networks do not require qubit couplings to be switched on and off. When restricted to N-qubit spin networks of identical qubit couplings, we show that 2log3N is the maximal perfect communication dist...
متن کاملun 2 00 6 Conclusive quantum - state transfer with a single randomly coupled spin chain
We studied the quantum state transfer in randomly coupled spin chains. By using local memories storing the information and dividing the task into transfer portion and decoding portion, conclusive transfer was ingeniously achieved with just one single spin chain. In our scheme, the probability of successful transfer can be made arbitrary close to unity. Especially, our scheme is a good protocol ...
متن کاملPerfect Coding for Dephased Quantum State Transfer
Near-future realisations of quantum technologies, from simple state-generation tasks [1–3] to analogue quantum simulation [4], will be small scale and will rely on intrinsic properties of the system to facilitate as much of their functionality as possible, rather than trying to impose error-prone operations to strong-arm the system into performing tasks. For example, existing quantum simulators...
متن کاملSpin chain model for correlated quantum channels
We analyze the quality of the quantum information transmission along a correlated quantum channel by studying the average fidelity between input and output states and the average output purity, giving bounds for the entropy of the channel. Noise correlations in the channel are modeled by the coupling of each channel use with an element of a one dimensional interacting quantum spin chain. Critic...
متن کاملInformation transfer rates in spin quantum channels
Spin networks are an ideal theoretical playground to devise, test and analyze quantum information processing [1]. Examples are the implementation of computational models in spin chains introduced in Refs. [2, 3] or the possibility to realize approximate quantum cloners [4]. In the context of quantum communication, several protocols have been proposed which would allow distant parties to exchang...
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: Physical Review A
سال: 2005
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.71.052315