Strong coupling between two distant electronic spins via a nanomechanical resonator
- Department of Physics, Tsinghua University, Beijing 100084 (China)
- Quantum Optoelectronics Institute, Southwest Jiaotong University, Chengdu 610031 (China)
We propose a scheme to achieve a strong coupling between two distant symmetrically placed electronic spins (such as nitrogen-vacancy centers in diamonds) by using a quantized nanomechanical resonator (NAMR) as a data bus. These distant spins (without any direct interaction) simultaneously couple to a common NAMR. When the detunings between effective spin transition frequencies and the fundamental frequency of the NAMR are large enough, an effective coupling could be induced between the two distant electronic spins. The value of such a coupling could be significantly large (i.e., up to a few kilohertz). This induced interaction between the two spins can be used to implement an iSWAP quantum gate, and to probabilistically prepare two-spin maximal entangled states by detecting the frequency shifts of the NAMR.
- OSTI ID:
- 21408582
- Journal Information:
- Physical Review. A, Vol. 81, Issue 4; Other Information: DOI: 10.1103/PhysRevA.81.042323; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
DIAMONDS
INTERACTIONS
NITROGEN
QUANTUM ENTANGLEMENT
RESONATORS
SPIN
VACANCIES
ANGULAR MOMENTUM
CARBON
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
MINERALS
NONMETALS
PARTICLE PROPERTIES
POINT DEFECTS