Quantum spin dynamics

Research group

Research theme

Sub department

About

Mechanism of generation of the emission bands in the dynamic spectrum of the Crab pulsar

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 388:2 (2008) 873-883

Authors:

Houshang Ardavan, Arzhang Ardavan, John Singleton, Mario R Perez
More details from the publisher

Photoisomerization of a fullerene dimer

JOURNAL OF PHYSICAL CHEMISTRY C 112:8 (2008) 2802-2804

Authors:

Jinying Zhang, Kyriakos Porfyrakis, John JL Morton, Mark R Sambrook, Jeffrey Harmer, Li Xiao, Arzhang Ardavan, G Andrew D Briggs
More details from the publisher

Temperature-dependent photoluminescence study of ErSC2N@C80 and Er2ScN@C80 fullerenes

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS 245:10 (2008) 1998-2001

Authors:

Archana Tiwari, Geraldine Dantelle, Kyriakos Porfyrakis, Arzhang Ardavan, G Andrew D Briggs
More details from the publisher

Configuration-selective spectroscopic studies of Er3+ centers in ErSc2N@C80 and Er2ScN@C80 fullerenes.

J Chem Phys 127:19 (2007) 194504

Authors:

Archana Tiwari, Geraldine Dantelle, Kyriakos Porfyrakis, Robert A Taylor, Andrew AR Watt, Arzhang Ardavan, G Andrew D Briggs

Abstract:

Low temperature photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopy of high purity ErSc(2)N@C(80) and Er(2)ScN@C(80) fullerenes reveal at least two metastable configurations of the Er(3+) ion within the cage, consistent with previous observations from x-ray diffraction. Using PLE measurements at a number of different emission wavelengths we have characterized the ground state, (4)I(152), and the first excited state, (4)I(132), of the various Er(3+) configurations and their crystal-field splitting. We present detailed energy level diagrams for the ground and excited states of the two dominant configurations of ErSc(2)N@C(80) and Er(2)ScN@C(80).
More details from the publisher
More details

Manipulation of quantum information in N@C60 using electron and nuclear magnetic resonance

Physica Status Solidi (B) Basic Research 244:11 (2007) 3874-3878

Authors:

A Ardavan, JJL Morton, SC Benjamin, K Porfyrakis, GAD Briggs, AM Tyryshkin, SA Lyon

Abstract:

We review recent progress towards implementing quantum information processing protocols using electron and nuclear magnetic resonance in the molecule 14N@C60. Using conventional spectrometers, we measure the errors inherent in quantum manipulations of spins. By applying composite pulses, we correct the dominant error to a high degree. Identifying a two qubit computational basis out of the electron and nuclear spin levels of 14N@C60, we implement an ultrafast phase gate on the nuclear qubit by exciting an electron spin transition. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.
More details from the publisher