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Zitterbewegung of electrons and holes in III-V semiconductor quantum wells
John Schliemann, Daniel Loss, R. M. Westervelt
The notion of zitterbewegung is a long-standing prediction of relativistic quantum mechanics. Here we extend earlier theoretical studies on this phenomenon for the case of III-V zi…
Dynamics of Coupled Qubits Interacting with an Off-Resonant Cavity
Oliver Gywat, Florian Meier, Daniel Loss +1
We study a model for a pair of qubits which interact with a single off-resonant cavity mode and, in addition, exhibit a direct inter-qubit coupling. Possible realizations for such…
Spin Decay in a Quantum Dot Coupled to a Quantum Point Contact
Massoud Borhani, Vitaly N. Golovach, Daniel Loss
We consider a mechanism of spin decay for an electron spin in a quantum dot due to coupling to a nearby quantum point contact (QPC) with and without an applied bias voltage. The co…
A Mesoscopic Resonating Valence Bond system on a triple dot
Karyn Le Hur, Patrik Recher, Emilie Dupont +1
We introduce a mesoscopic pendulum from a triple dot. The pendulum is fastened through a singly-occupied dot (spin qubit). Two other strongly capacitively islands form a double-dot…
Nuclear spin state narrowing via gate--controlled Rabi oscillations in a double quantum dot
D. Klauser, W. A. Coish, Daniel Loss
We study spin dynamics for two electrons confined to a double quantum dot under the influence of an oscillating exchange interaction. This leads to driven Rabi oscillations between…
Cotunneling current through quantum dots with phonon-assisted spin-flip processes
Jörg Lehmann, Daniel Loss
We consider cotunneling through a quantum dot in the presence of spin-flip processes induced by the coupling to acoustic phonons of the surrounding. An expression for the phonon-as…