dorsal/arxiv
View SchemaQuantum Computation by Quantum Operations on Mixed States
| Authors | Vasily E. Tarasov |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0201033 |
| URL | https://arxiv.org/abs/quant-ph/0201033 |
Abstract
Usually models for quantum computations deal with unitary gates on pure states. In this paper we generalize the usual model. We consider a model of quantum computations in which the state is an operator of density matrix and the gates are quantum operations, not necessarily unitary. A mixed state (operator of density matrix) of n two-level quantum systems is considered as an element of $4^{n}$-dimensional operator Hilbert space. Unitary quantum gates and nonunitary quantum operations for n-qubit system are considered as generalized quantum gates acting on mixed state. In this paper we study universality for quantum computations by quantum operations on mixed states.
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"abstract": "Usually models for quantum computations deal with unitary gates on pure\nstates. In this paper we generalize the usual model. We consider a model of\nquantum computations in which the state is an operator of density matrix and\nthe gates are quantum operations, not necessarily unitary. A mixed state\n(operator of density matrix) of n two-level quantum systems is considered as an\nelement of $4^{n}$-dimensional operator Hilbert space. Unitary quantum gates\nand nonunitary quantum operations for n-qubit system are considered as\ngeneralized quantum gates acting on mixed state. In this paper we study\nuniversality for quantum computations by quantum operations on mixed states.",
"arxiv_id": "quant-ph/0201033",
"authors": [
"Vasily E. Tarasov"
],
"categories": [
"quant-ph"
],
"title": "Quantum Computation by Quantum Operations on Mixed States",
"url": "https://arxiv.org/abs/quant-ph/0201033"
},
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