Download Read-Out and Coherent Manipulation of an Isolated Nuclear by Stefan Thiele PDF

By Stefan Thiele

This thesis sheds new mild at the around the globe first electric manipulation of a unmarried nuclear spin. during the last 4 a long time, the dimensions of a piece, the smallest logical unit in a working laptop or computer, has diminished via greater than orders of significance and should quickly achieve a restrict the place quantum phenomena turn into vital. encouraged via the facility of quantum mechanics, researchers have already pointed out natural quantum structures, having, analog to a classical bit, controllable and readable states. during this regard, the inherent spin of electrons or nuclei with its eigenstates, spin up and spin down, is a promising candidate. utilizing services within the box of single-molecule magnets, the writer built a molecular transistor, which permits quantum details to be written onto a unmarried nuclear spin by way of an electrical box in simple terms, and, additionally, allows the digital read-out of this quantum country. This novel procedure opens a route to addressing and manipulating person nuclear spins inside a truly limited house (a unmarried molecule), at excessive velocity. hence, the writer used to be capable of exhibit that unmarried molecule magnets are promising applicants for quantum info processing, that is triggering a brand new box of study in the direction of molecular quantum electronics.

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Read-Out and Coherent Manipulation of an Isolated Nuclear Spin : Using a Single-Molecule Magnet Spin-Transistor

This thesis sheds new mild at the world wide first electric manipulation of a unmarried nuclear spin. over the past 4 a long time, the scale of a piece, the smallest logical unit in a working laptop or computer, has reduced through greater than orders of importance and may quickly succeed in a restrict the place quantum phenomena develop into very important.

Additional resources for Read-Out and Coherent Manipulation of an Isolated Nuclear Spin : Using a Single-Molecule Magnet Spin-Transistor

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5kB TK [12]. This can be understood by a semi-classical consideration of the residual spin which was left unscreened. The ferromagnetic coupling between the two spins, which led to the formation of the triplet ground state, results in an effective magnetic field created by the unscreened spin at the site of the screen spin. This field weakens the antiferromagnetic coupling of the second spin to the electrons in the leads. Hence, already at very small external magnetic fields, the critical field is reached, leading to a shift of Bc towards zero (Fig.

Phys. Eng. Sci. 286, 352–365 (1965) 13. R. Vincent, S. Klyatskaya, M. Ruben, W. Wernsdorfer, F. Balestro, Electronic read-out of a single nuclear spin using a molecular spin transistor. Nature 488, 357–360 (2012) 14. L. Landau, Zur Theorie der Energieubertragung II. Phys. Sov. Union 2, 46–51 (1932) 15. C. Zener, Non-adiabatic crossing of energy levels. Proc. Roy. Soc. A: Math. Phys. Eng. Sci. 137, 696–702 (1932) 16. R. Vincent, S. Klyatskaya, M. Ruben, W. Wernsdorfer, F. Balestro, Electronic read-out of a single nuclear spin using a molecular spin transistor.

5 Spin-Orbit Interaction The spin-orbit interaction is the coupling of the electron’s spin s with its orbital momentum l. In the semi-classical picture the electron’s orbital motion creates a magnetic moment µl = − μB l. 5 Spin-Orbit Interaction 27 ment from 1921, it is known that electrons possess a magnetic moment µs generated by its inherent spin s. Due to dipole interactions, the formerly independent momenta are connected, resulting in the total momentum j = l + s. The energy change resulting from this interaction is E = −µs B l ∝ l s.

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