Realization of Logically Labeled Effective Pure States for Bulk Quantum Computation
نویسندگان
چکیده
منابع مشابه
Realization of Logically Labeled Effective Pure States for Bulk Quantum Computation
We report the first use of “logical labeling” to perform a quantum computation with a roomtemperature bulk system. This method entails the selection of a subsystem that behaves as if it were at zero temperature—except for a decrease in signal strength—conditioned upon the state of the remaining system. No averaging over differently prepared molecules is required. In order to test this concept, ...
متن کاملAre random pure States useful for quantum computation?
We show the following: a randomly chosen pure state as a resource for measurement-based quantum computation is-with overwhelming probability-of no greater help to a polynomially bounded classical control computer, than a string of random bits. Thus, unlike the familiar "cluster states," the computing power of a classical control device is not increased from P to BQP (bounded-error, quantum poly...
متن کاملOptical realization of optimal unambiguous discrimination for pure and mixed quantum states.
Quantum mechanics forbids deterministic discrimination among nonorthogonal states. Nonetheless, the capability to distinguish nonorthogonal states unambiguously is an important primitive in quantum information processing. In this work, we experimentally implement generalized measurements in an optical system and demonstrate the first optimal unambiguous discrimination between three nonorthogona...
متن کاملBulk Spin-Resonance Quantum Computation
Quantum computation remains an enormously appealing but elusive goal. It is appealing because of its potential to perform superfast algorithms, such as finding prime factors in polynomial time, but also elusive because of the difficulty of simultaneously manipulating quantum degrees of freedom while preventing environmentally induced decoherence. A new approach to quantum computing is introduce...
متن کاملSeparability criterion for multipartite pure quantum states
Using the modified tensor product of graphs defined in [1], we present here a graphical criterion for the separability of m-partite pure quantum states living in a real or complex Hilbert space. The criterion gives both necessary and sufficient condition for the separability of such states. This criterion was first conjectured by S. L. Braunstein, S. Ghosh, T. Mansour, S. Severini, and R. C. Wi...
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 Letters
سال: 1999
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.83.3085