Quantum Logic Network for Probabilistic Cloning Quantum States
نویسندگان
چکیده
منابع مشابه
Probabilistic quantum cloning via Greenberger-Horne-Zeilinger states
We propose a probabilistic quantum cloning scheme using Greenberger-Horne-Zeilinger ~GHZ! states, Bellbasis measurements, single-qubit unitary operations, and generalized measurements, all of which are within the reach of current technology. Compared to another possible scheme via Tele-controlled-NOT gate @D. Gottesman and I. L. Chuang, Nature ~London! 402, 390 ~1999!#, the present scheme may b...
متن کاملProbabilistic cloning and identification of linearly independent quantum states
We construct a probabilistic quantum cloning machine by a general unitary-reduction operation. With a postselection of the measurement results, the machine yields faithful copies of the input states. It is shown that the states secretly chosen from a certain set $ = {|Ψ1〉 , |Ψ2〉 , · · · , |Ψn〉} can be probabilistically cloned if and only if |Ψ1〉, |Ψ2〉, · · · , and |Ψn〉 are linearly-independent....
متن کاملOptimal probabilistic cloning and purification of quantum states
We investigate the probabilistic cloning and purification of quantum states. The performance of these probabilistic operations is quantified by the average fidelity between the ideal and actual output states. We provide a simple formula for the maximal achievable average fidelity and we explicitly show how to construct a probabilistic operation that achieves this fidelity. We illustrate our met...
متن کامل”Partial” quantum cloning and quantum cloning of the mixed states
We discuss the ”partial” quantum cloning of the pure two-partite states, when the ”part” of initial state related to the one qubit is copied only. The same approach gives the possibility to design the quantum copying machine for the mixed qubit states. PACS: 03.67 -a, 03.67 Dd
متن کاملQuantum logic networks for probabilistic and controlled teleportation of unknown quantum states
We present simplification schemes for probabilistic and controlled teleportation of the unknown quantum states of both one-particle and two-particle and construct efficient quantum logic networks for implementing the new schemes by means of the primitive operations consisting of single-qubit gates, two-qubit controlled-not gates, Von Neumann measurement and classically controlled operations. In...
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: Communications in Theoretical Physics
سال: 2005
ISSN: 0253-6102
DOI: 10.1088/0253-6102/43/1/015