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Entanglement generation by adiabatic navigation in the space of symmetric multi-particle states | | Razmik G. Unanyan
; Michael Fleischhauer
; Nikolay V. Vitanov
; Klaas Bergmann
; | | Date: |
19 May 2002 | | Subject: | quant-ph | | Abstract: | We propose a technique for robust and efficient navigation in the Hilbert space of entangled symmetric states of a multiparticle system with externally controllable linear and nonlinear collective interactions. A linearly changing external field applied along the quantization axis creates a network of well separated level crossings in the energy diagram of the collective states. One or more transverse pulsed fields applied at the times of specific level crossings induce adiabatic passage between these states. By choosing the timing of the pulsed field appropriately, one can transfer an initial product state of all N spins into (i) any symmetric state with n spin excitations and (ii) the N-particle analog of the Greenberger-Horne-Zeilinger state. This technique, unlike techniques using pulses of specific area, does not require precise knowledge of the number of particles and is robust against variations in the interaction parameters. We discuss potential applications in two-component Bose condensates and ion-trap systems. | | Source: | arXiv, quant-ph/0205118 | | Services: | Forum | Review | PDF | Favorites | |
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