Quantum phase transition of ground-state entanglement in a Heisenberg spin chain simulated in an NMR quantum computer

Journal Article · Sat Jan 01 00:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.012307· OSTI ID:20650189

Xinhua, Peng; Suter, Dieter ^[1]; Jiangfeng, Du ^[2]

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1. Fachbereich Physik, Universitaet Dortmund, 44221 Dortmund (Germany)
2. Department of Physics, National University of Singapore, 117542 Singapore (Singapore)

Using an NMR quantum computer, we experimentally simulate the quantum phase transition of a Heisenberg spin chain. The Hamiltonian is generated by a multiple-pulse sequence, the nuclear-spin system is prepared in its (pseudopure) ground state, and the effective Hamiltonian varied in such a way that the Heisenberg chain is taken from a product state to an entangled state, and finally to a different product state.

• OSTI ID: 20650189
• Journal Information: Physical Review. A, Vol. 71, Issue 1; Other Information: DOI: 10.1103/PhysRevA.71.012307; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
GROUND STATES
HAMILTONIANS
INFORMATION THEORY
NUCLEAR MAGNETIC RESONANCE
PHASE TRANSFORMATIONS
PULSES
QUANTUM MECHANICS
QUANTUM NUMBERS
SPIN