Perfect Transfer of Many-Particle Quantum State via High-Dimensional Systems with Spectrum-Matched Symmetry |
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| Authors: | LI Ying SONG Zhi SUN Chang-Pu |
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| Affiliation: | 1. Department of Physics, The Key Lab of Weak Light NonlinearPhotonics, Ministry of Education, Nankai University, Tianjin 300071, China;2. Institute of Theoretical Physics, the Chinese Academyof Sciences, Beijing 100080, China |
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| Abstract: | The quantum state transmission through the medium of high-dimensional many-particle system (boson or spinless fermion) is generally studied with a symmetry analysis. We discover that, if the spectrum of a Hamiltonianmatches the symmetry of a fermion or boson system in a certain fashion, aperfect quantum state transfer can be implemented without any operation onthe medium with pre-engineered nearest neighbor (NN). We also study a simplebut realistic near half-filled tight-binding fermion system with uniform NNhopping integral. We show that an arbitrary many-particle state near thefermi surface can be perfectly transferred to its translational counterpart. |
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| Keywords: | high-dimensional many-particle system perfect quantum state transfer |
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