期刊
CHEMPHYSCHEM
卷 17, 期 22, 页码 3714-3722出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201600781
关键词
entanglement; pendular states; polar molecules; quantum computing; superposition
资金
- Qatar National Research Foundation (QNRF) [NPRP 7-317-1-055]
- Shanghai Natural Science Foundation [15ZR1411300]
We investigate several aspects of realizing quantum computation using entangled polar molecules in pendular states. Quantum algorithms typically start from a product state |000 and we show that up to a negligible error, the ground states of polar molecule arrays can be considered as the unentangled qubit basis state |000 . This state can be prepared by simply allowing the system to reach thermal equilibrium at low temperature (<1mK). We also evaluate entanglement, characterized by concurrence of pendular state qubits in dipole arrays as governed by the external electric field, dipole-dipole coupling and number N of molecules in the array. In the parameter regime that we consider for quantum computing, we find that qubit entanglement is modest, typically no greater than 10(-4), confirming the negligible entanglement in the ground state. We discuss methods for realizing quantum computation in the gate model, measurement-based model, instantaneous quantum polynomial time circuits and the adiabatic model using polar molecules in pendular states.
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