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- W1999306470 abstract "We investigate current fluctuations in a three-terminal quantum dot in the sequential tunneling regime. In the voltage-bias configuration chosen here, the circuit is operated like a beam splitter, i.e. one lead is used as an input and the other two as outputs. In the limit where a double occupancy of the dot is not possible, a super-Poissonian Fano factor of the current in the input lead and positive cross-correlations between the current fluctuations in the two output leads can be obtained, due to dynamical channel-blockade. When a single orbital of the dot transports current, this effect can be obtained by lifting the spin-degeneracy of the circuit with ferromagnetic leads or with a magnetic field. When several orbitals participate in the electronic conduction, lifting spin-degeneracy is not necessary. In all cases, we show that a super-Poissonian Fano factor for the input current is not equivalent to positive cross-correlations between the outputs. We identify the conditions for obtaining these two effects and discuss possible experimental realizations." @default.
- W1999306470 created "2016-06-24" @default.
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- W1999306470 date "2004-09-22" @default.
- W1999306470 modified "2023-09-23" @default.
- W1999306470 title "Positive cross-correlations due to dynamical channel blockade in a three-terminal quantum dot" @default.
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- W1999306470 doi "https://doi.org/10.1103/physrevb.70.115315" @default.
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