Entanglement and transport through correlated quantum dot
@article{Rycerz2006EntanglementAT, title={Entanglement and transport through correlated quantum dot}, author={Adam Rycerz}, journal={The European Physical Journal B - Condensed Matter and Complex Systems}, year={2006}, volume={52}, pages={291-296} }
Abstract.We study quantum entanglement in a single-level quantum dot in the
linear-response regime.
The results show, that the maximal quantum value of the conductance
2e2/h not always match the maximal entanglement.
The pairwise entanglement between the quantum dot and the nearest atom of the
lead is also analyzed by utilizing the Wootters formula
for charge and spin degrees of freedom separately.
The coexistence of zero concurrence and the maximal conductance is observed
for low values of…
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References
SHOWING 1-10 OF 39 REFERENCES
Double-occupancy errors, adiabaticity, and entanglement of spin qubits in quantum dots
- Physics
- 2001
Quantum gates that temporarily increase singlet-triplet splitting in order to swap electronic spins in coupled quantum dots lead inevitably to a finite double-occupancy probability for both dots. By…
Diverging entanglement length in gapped quantum spin systems.
- PhysicsPhysical review letters
- 2004
It is proved the existence of gapped quantum Hamiltonians whose ground states exhibit an infinite entanglement length, as opposed to their finite correlation length, and it is reported on evidence that the ground state of an antiferromagnetic chain can be used as a perfect quantum channel if local measurements on the individual spins can be implemented.
Conductance of a double quantum dot with correlation-induced wave function renormalization
- Physics
- 2006
Scaling of entanglement close to a quantum phase transition
- PhysicsNature
- 2002
It is demonstrated, for a class of one-dimensional magnetic systems, that entanglement shows scaling behaviour in the vicinity of the transition point, which connects the theory of critical phenomena with quantum information by exploring the entangling resources of a system close to its quantum critical point.
Quantum entanglement in fermionic lattices
- Physics
- 2002
The Fock space of a system of indistinguishable particles is isomorphic (in a nonunique way) to the state space of a composite, i.e., many modes, quantum system. One can then discuss quantum…
Entanglement of Formation of an Arbitrary State of Two Qubits
- Physics
- 1998
The entanglement of a pure state of a pair of quantum systems is defined as the entropy of either member of the pair. The entanglement of formation of a mixed state is defined as the minimum average…
Fano versus Kondo resonances in a multilevel "semiopen" quantum dot.
- PhysicsPhysical review letters
- 2004
Kondo correlations damp the oscillations on an extended range of gate voltage values, by freezing the occupancy of the epsilon(0) level itself, as a consequence of the antiresonances of Fano origin are washed out.
An intrinsic limit to quantum coherence due to spontaneous symmetry breaking.
- PhysicsPhysical review letters
- 2005
It is shown that spontaneous symmetry breaking imposes a fundamental limit to the time that a system can stay quantum coherent, which is approximately 2piNH/(kBT).
Quantum phase transitions
- Physics
- 2001
Abstract We give a general introduction to quantum phase transitions in strongly correlated electron systems. These transitions, which occur at zero temperature when a non-thermal parameter g such as…
Entanglement and quantum phase transition in the extended Hubbard model.
- PhysicsPhysical review letters
- 2004
The results show, for the first time, that entanglement can be used to identify quantum phase transitions in fermionic systems.