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[Fizinfo] Wigner FK SZFI szeminarium -- Pályi András

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  • From: Janos Asboth <asboth.janos AT>
  • To: fizinfo AT, seminar AT
  • Subject: [Fizinfo] Wigner FK SZFI szeminarium -- Pályi András
  • Date: Fri, 18 Nov 2016 16:11:58 +0100
  • Authentication-results: (amavisd-new); dkim=pass (1024-bit key) reason="pass (just generated, assumed good)"


(BME TTK Fizika Tanszék, vendéglátó: Asbóth János)
"Donor-based spin qubits in silicon"

Időpont: 2016. november 22. (kedd) 10:00 (1 óra)
Hely: MTA Wigner FK SZFI, I. épület 1. emeleti Tanácsterem
Recent years have seen important experimental advances toward quantum
information processing with electron spins and nuclear spins in
semiconductors. An exceptionally promising qubit system is a phosphorus
donor embedded in a silicon crystal [1]. The qubit can be encoded either in
the spin of the donor-bound electron, or the nuclear spin of the phosphorus
atom. A recent proposal [2] highlights the possibility of encoding a qubit
in the combined electron-nuclear system, providing an opportunity to use
electric fields to realize fast single-qubit and two-qubit quantum logical
operations. In the talk, I will review this proposal and present our
theoretical results on the qubit´s relaxation mechanisms and time scales
[3]. Our main conclusion is that even though the qubit lifetime can be 8
orders of magnitude shorter in the proposed nanostructure than in bulk
silicon, it is still much longer than the times required for the logical

[1] B. E. Kane, A silicon-based nuclear spin quantum computer, Nature 393,
133 (1998)
[2] G. Tosi et al., Silicon quantum processor with long-distance qubit
couplings, arXiv:1509.08538
[3] P. Boross, G. Szechenyi, A. Palyi, Valley-enhanced fast relaxation of
gate-controlled donor qubits in silicon, Nanotechnology 27, 314002 (2016)

*Részletes információ:*
Minden érdeklődőt szívesen látunk!

Asbóth János
szfi-seminar AT

  • [Fizinfo] Wigner FK SZFI szeminarium -- Pályi András, Janos Asboth, 11/18/2016

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