Adiabatic freezing of long-range quantum correlations in spin chains
arXiv:1502.01489 · doi:10.1209/0295-5075/114/60007
Abstract
We consider a process to create quasi long-range quantum discord between the non-interacting end spins of a quantum spin chain, with the end spins weakly coupled to the bulk of the chain. The process is not only capable of creating long-range quantum correlation but the latter remains frozen, when certain weak end-couplings are adiabatically varied below certain thresholds. We term this phenomenon as adiabatic freezing of quantum correlation. We observe that the freezing is robust to moderate thermal fluctuations and is intrinsically related to the cooperative properties of the quantum spin chain. In particular, we find that the energy gap of the system remains frozen for these adiabatic variations, and moreover, considering the end spins as probes, we show that the interval of freezing can detect the anisotropy transition in quantum XY spin chains. Importantly, the adiabatic freezing of long-range quantum correlations can be simulated with contemporary experimental techniques.
Main text (6 pages, 6 figures) and Supplemental material (4 pages, 4 figures), REVTeX 4-1
References in corpus (29)
- Finite-Time Disentanglement via Spontaneous Emission
- Quantum discord and the power of one qubit
- Experimental quantum computing without entanglement
- Robustness of quantum discord to sudden death
- Entanglement versus Correlations in Spin Systems
- Quantum discord and quantum phase transition in spin chains
- Frozen Quantum Coherence
- Interpreting quantum discord through quantum state merging
- Operational interpretations of quantum discord
- Quantum discord determines the interferometric power of quantum states
- Localizable Entanglement
- Operational Significance of Discord Consumption: Theory and Experiment
- Quantum discord as a resource for quantum cryptography
- Long-distance entanglement in spin systems
- Long-distance entanglement and quantum teleportation in XX spin chains
- Qubit Teleportation and Transfer across Antiferromagnetic Spin Chains
- Universal freezing of quantum correlations within the geometric approach
- Frozen discord in non-Markovian dephasing channels
- Measuring bipartite quantum correlations of an unknown state
- Scaling of quantum discord in spin models
- Detection of XY behaviour in weakly anisotropic quantum antiferromagnets on the square lattice
- Long-distance entanglement and quantum teleportation in coupled cavity arrays
- To freeze or not to: Quantum correlations under local decoherence
- Robust asymptotic entanglement under multipartite collective dephasing
- Quantum instability and edge entanglement in a quasi-long-range order
- Entanglement Enhanced Information Transfer through Strongly Correlated Systems and its Application to Optical Lattices
- Signature of Quantum Entanglement in NH4CuPO4.H2O
- Simulating long-distance entanglement in quantum spin chains by superconducting flux qubits
- Cumulative quantum work-deficit versus entanglement in the dynamics of an infinite spin chain
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