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The physics of quantum walks on graphs is formulated in Hamiltonian language, both for simple quantum walks and for composite walks, where extra discrete degrees of freedom live at each node of theâ€¦ (More)

- Andrea Morello, Philip C. E. Stamp, Igor S. Tupitsyn
- Physical review letters
- 2006

Experiments involving phase coherent dynamics of networks of spins, such as echo experiments, will only work if decoherence can be suppressed. We show here, by analyzing the particular example of aâ€¦ (More)

- Igor S. Tupitsyn, Alexei Kitaev, N. V. Prokofâ€™ev, Philip C. E. Stamp
- 2010

I. S. Tupitsyn,1,2 A. Kitaev,3 N. V. Prokofâ€™ev,4 and P. C. E. Stamp1,2 1Pacific Institute of Theoretical Physics, Vancouver, British Columbia, Canada V6T 1Z1 2Department of Physics and Astronomy,â€¦ (More)

- Philip C. E. Stamp
- Philosophical transactions. Series Aâ€¦
- 2012

We review the difference between standard environmental decoherence and 'intrinsic decoherence', which is taken to be an ineluctable process of Nature. Environmental decoherence is typically modelledâ€¦ (More)

- Igor S. Tupitsyn, Philip C. E. Stamp, Alexander L. Burin
- Physical review letters
- 2008

We investigate the stability of the recently discovered room-temperature Bose-Einstein condensate (BEC) of magnons in yttrium iron garnet films. We show that magnon-magnon interactions dependâ€¦ (More)

- Moshe Schechter, Philip C. E. Stamp
- Physical review letters
- 2005

We consider the quantum magnet at LiHo(x)Y(1-x)F(4) at x = 0.167. Experimentally the spin glass to paramagnet transition in this system was studied as a function of the transverse magnetic field andâ€¦ (More)

- Dominic Marchand, Giulio De Filippis, +5 authors Philip C. E. Stamp
- Physical review letters
- 2010

We study a single polaron in the Su-Schrieffer-Heeger (SSH) model using four different techniques (three numerical and one analytical). Polarons show a smooth crossover from weak to strong coupling,â€¦ (More)

A.O. Barvinsky, D. Carney, 3, 4 and P.C.E. Stamp 5, 6 Theory Department, Lebedev Physics Institute, Leninsky Prospect 53, Moscow 117924, Russia Pacific Institute of Theoretical Physics, University ofâ€¦ (More)

- Philip C. E. Stamp
- Nature
- 1992

The spin-glass phase in the LiHo x Y 1âˆ’x F 4 compound is considered. At zero transverse field this system is well described by the classical Ising model. At finite transverse field deviations fromâ€¦ (More)