303 citations · 4.6k across the 110 of their papers we have counts for
8 papers · 1 filter
Toric-boson model: Toward a topological quantum memory at finite temperature
Alioscia Hamma, Claudio Castelnovo, Claudio Chamon
We discuss the existence of stable topological quantum memory at finite temperature. At stake here is the fundamental question of whether it is, in principle, possible to store qua…
Lieb-Robinson bounds and the speed of light from topological order
Alioscia Hamma, Fotini Markopoulou, Isabeau Premont-Schwarz +1
We apply the Lieb-Robinson bounds technique to find the maximum speed of interaction in a spin model with topological order whose low-energy effective theory describes light [see X…
Adiabatic approximation with exponential accuracy for many-body systems and quantum computation
D. A. Lidar, A. T. Rezakhani, A. Hamma
We derive a version of the adiabatic theorem that is especially suited for applications in adiabatic quantum computation, where it is reasonable to assume that the adiabatic interp…
Decoherence and Entanglement Dynamics of Coupled Qubits
G. Campagnano, A. Hamma, U. Weiss
We study the entanglement dynamics and relaxation properties of a system of two interacting qubits in the two cases (I) two independent bosonic baths and (II) one common bath, at t…
Hidden entanglement at the Planck scale: loss of unitarity and the information paradox
Michele Arzano, Alioscia Hamma, Simone Severini
We discuss how relaxing the requirement of locality for quantum fields can equip the Hilbert space of the theory with a richer structure in its multi-particle sector. A physical co…
Diffusion on an Ising chain with kinks
Alioscia Hamma, Toufik Mansour, Simone Severini
We count the number of histories between the two degenerate minimum energy configurations of the Ising model on a chain, as a function of the length n and the number d of kinks tha…
Adiabatic approximation for many body systems and quantum computation
Alioscia Hamma, Daniel A. Lidar
This paper has been withdrawn as it has been superseded by 0808.2697
Fidelity analysis of topological quantum phase transitions
Damian F. Abasto, Alioscia Hamma, Paolo Zanardi
We apply the fidelity metric approach to analyze two recently introduced models that exhibit a quantum phase transition to a topologically ordered phase. These quantum models have…