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The problem of the classical limit of quantum mechanics and the role of self-induced decoherence
(Springer, 2006-12)
Our account of the problem of the classical limit of quantum mechanics involves two elements. The first one is self-induced decoherence, conceived as a process that depends on the own dynamics of a closed quantum system ...
Remanent quantum correlations in dissipative qubits
(Elsevier Science, 2013-08-02)
Starting from the exact evolution of a Markovian dissipative quantum walk, a non-Markovian decoherence of two qubits interacting with a phonon thermal bath has been investigated analytically using quantum information tools. ...
Entanglement and the process of measuring the position of a quantum particle
(Elsevier, 2015-03)
We explore the entanglement-related features exhibited by the dynamics of a composite quantum system consisting of a particle and an apparatus (here referred to as the "pointer") that measures the position of the particle. ...
Adiabatic quantum motors
(Amer Physical Soc, 2013-08-09)
When parameters are varied periodically, charge can be pumped through a mesoscopic conductor without applied bias. Here, we consider the inverse effect in which a transport current drives a periodic variation of an adiabatic ...
Controlled high-fidelity navigation in the charge stability diagram of a double quantum dot
(Iop Publishing, 2015-03)
We propose an efficient control protocol for charge transfer in a double quantum dot. We consider numerically a two-dimensional model system, where the quantum dots are subjected to time-dependent electric fields ...
Planar quantum squeezing in spin-1/2 systems
(IOP Publishing, 2015-10)
Planar quantum squeezed (PQS) states, i.e. quantum states which are squeezed in two orthogonal spin components on a plane, have recently attracted attention due to their applications in atomic interferometry and quantum ...
Discord-entanglement interplay in the thermodynamic limit: the xy-model
(World Scientific, 2013-02)
We investigate thermal properties of quantum correlations in the thermodynamic limit with reference to the XY-model and the finite two-qubit Heisenberg model. Although this model has been the subject of active entangleme ...
Measuring quantum conductance and capacitance of graphene using impedance-derived capacitance spectroscopy
(2021-10-30)
Here, we demonstrate that impedance-derived capacitance spectroscopy is a useful method for measuring and analyzing the quantum of conductance and capacitance of a single-layer graphene sheet. Both quantum conductance and ...
Optimal control of hybrid qubits: Implementing the quantum permutation algorithm
(2018-03-21)
The optimal quantum control theory is employed to determine electric pulses capable of producing quantum gates with a fidelity higher than 0.9997, when noise is not taken into account. Particularly, these quantum gates ...
Spontaneous spin polatization in doped semiconductor quantum wells
(Springer, 2005-12)
We calculate the critical density of the zero-temperature, first-order ferromagnetic phase transition in n-doped GaAs/AlGaAs quantum wells. We predict that this transition could be observed in narrow quantum wells at ...