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[Fizinfo] Dimitrie Culcer eloadasa a BME-n


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  • From: Andras Palyi <andraspalyi AT caesar.elte.hu>
  • To: FIZINFO AT lists.kfki.hu
  • Subject: [Fizinfo] Dimitrie Culcer eloadasa a BME-n
  • Date: Sun, 9 Jul 2017 17:14:05 +0200

A BME-MTA Egzotikus Kvantum Fázisok kutatócsoport következő szemináriuma:


Dimitrie Culcer (University of New South Wales, Sydney, Ausztrália)

“FULLY TUNABLE COHERENCE AND CONTROL OF ACCEPTOR QUBITS"

Kivonat: “Electrical control of quantum bits could pave the way for scalable
quantum computation. An acceptor spin qubit in Si, based on spin-3/2 holes,
can be controlled by electrical means using a gate electrode, which offers
fast one- and two-qubit rotations and long coherence times at certain sweet
spots. The relaxation time T1, while allowing >10^5 operations, is the
primary limiting factor. I will show that, due to the interplay of the Td
symmetry of the acceptor in the Si lattice and the spin-3/2 characteristic of
hole systems, an applied in-plane magnetic field strongly enhances the
performance and coherence properties of the qubit. An appropriate choice of
magnetic field orientation leads to a near-total suppression of spin
relaxation as well as full tunability of two-qubit operations in a parameter
regime in which dephasing due to charge fluctuations can be eliminated.
Interestingly for spintronic applications, an extreme in-plane anisotropy
exists such that the in-plane g-factor can vanish under certain
circumstances."


Helye: BME Fizikai Intézet, Elméleti Fizika Tanszék
Budafoki út 8., F épület, III. lépcsőház, magasföldszint, szemináriumi szoba

Ideje: 2017. július 11. (kedd), 14:15.


Minden érdeklődőt szívesen látunk.


Üdvözlettel,
Pályi András



  • [Fizinfo] Dimitrie Culcer eloadasa a BME-n, Andras Palyi, 07/09/2017

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