Topological qubits in graphene-like systems (2009)
Santos, Luiz, Ryu, Shinsei, Chamon, Claudio, Mudry, Christopher
The fermion-doubling problem can be an obstacle to getting half-a-qubit in two-dimensional fermionic tight-binding models in the form of Majorana zero modes bound to the core of superconducting...
String-nets, single and double-stranded quantum loop gases for non-Abelian anyons (2009)
Velenich, Andrea, Chamon, Claudio, Wen, Xiao-Gang
String-net condensation can give rise to non-Abelian anyons whereas loop condensation usually gives rise to Abelian anyons. It has been proposed that generalized quantum loop gases with...
Santos, Luiz, Neupert, Titus, Chamon, Claudio, Mudry, Christopher
We study the superconducting instabilities of a single species of two-dimensional Rashba-Dirac fermions, as it pertains to the surface of a three-dimensional time-reversal symmetric topological band...
Deconfined fractional electric charges in graphene at high magnetic fields (2009)
Hou, Chang-Yu, Chamon, Claudio, Mudry, Christopher
The resistance at the charge neutral (Dirac) point was shown by Checkelsky et al in Phys. Rev. B 79, 115434 (2009) to diverge upon the application of a strong magnetic field normal to graphene. We...
Ryu, Shinsei, Mudry, Christopher, Hou, Chang-Yu, Chamon, Claudio
We classify all possible 36 gap-opening instabilities in graphene-like structures in two dimensions, i.e., masses of Dirac Hamiltonian when the spin, valley, and superconducting channels are...
Topological Quantum Memory at Finite Temperature (2008)
Hamma, Alioscia, Castelnovo, Claudio, Chamon, Claudio
We discuss the existence of stable topological quantum memory at finite temperature. At stake here is the fundamental question of whether it is possible to store quantum information for macroscopic...
Long tunneling contact as a probe of fractional quantum Hall neutral edge modes (2008)
Overbosch, B. J., Chamon, Claudio
We study the tunneling current between edge states of quantum Hall liquids across a single long contact region, and predict a resonance at a bias voltage set by the scale of the edge velocity. For...
Corner Junction as a Probe of Helical Edge States (2008)
Hou, Chang-Yu, Kim, Eun-Ah, Chamon, Claudio
We propose and analyze inter-edge tunneling in a quantum spin Hall corner junction as a means to probe the helical nature of the edge states. We show that electron-electron interactions in the...
Theory of the superglass phase (2008)
Biroli, Giulio, Chamon, Claudio, Zamponi, Francesco
A superglass is a phase of matter which is characterized at the same time by superfluidity and a frozen amorphous structure. We introduce a model of interacting bosons in three dimensions that...
Topological order in a 3D toric code at finite temperature (2008)
Castelnovo, Claudio, Chamon, Claudio
We study topological order in a toric code in three spatial dimensions, or a 3+1D Z_2 gauge theory, at finite temperature. We compute exactly the topological entropy of the system, and show that it...
Scaling and super-universality in the coarsening dynamics of the 3d random field Ising model (2008)
Aron, Camille, Chamon, Claudio, Cugliandolo, Leticia F., Picco, Marco
We study the coarsening dynamics of the three-dimensional random field Ising model using Monte Carlo numerical simulations. We test the dynamic scaling and super-scaling properties of global and...
From particles to spins: Eulerian formulation of supercooled liquids and glasses (2008)
Chamon, Claudio, Cugliandolo, Leticia F., Fabricius, Gabriel, Iguain, Jose Luis, Weeks, Eric R.
The dynamics of supercooled liquid and glassy systems are usually studied within the Lagrangian representation, in which the positions and velocities of distinguishable interacting particles are...
On the Brownian gas: a field theory with a Poissonian ground state (2008)
Velenich, Andrea, Chamon, Claudio, Cugliandolo, Leticia F., Kreimer, Dirk
As a first step towards a successful field theory of Brownian particles in interaction, we study exactly the non-interacting case, its combinatorics and its non-linear time-reversal symmetry. Even...
Junctions of three quantum wires for spin 1/2 electrons (2008)
Hou, Chang-Yu, Chamon, Claudio
We study the effects of electron-electron interactions on the transport properties of a junction of three quantum wires enclosing a magnetic flux. The wires are modeled as single channel spin-1/2...
Electron fractionalization for two-dimensional Dirac fermions (2007)
Chamon, Claudio, Hou, Chang-Yu, Jackiw, Roman, Mudry, Christopher, Pi, So-Young, Semenoff, Gordon
Fermion-number fractionalization without breaking of time-reversal symmetry was recently demonstrated for a field theory in $(2+1)$-dimensional space and time that describes the couplings between...
Irrational vs. rational charge and statistics in two-dimensional quantum systems (2007)
Chamon, Claudio, Hou, Chang-Yu, Jackiw, Roman, Mudry, Christopher, Pi, So-Young, Schnyder, Andreas P.
We show that quasiparticle excitations with irrational charge and irrational exchange statistics exist in tight-biding systems described, in the continuum approximation, by the Dirac equation in...
Dynamics of single polymers under extreme confinement (2007)
Rahmani, Armin, Castelnovo, Claudio, Schmit, Jeremy, Chamon, Claudio
We study the dynamics of a single chain polymer confined to a two dimensional cell. We introduce a kinetically constrained lattice gas model that preserves the connectivity of the chain, and we use...
Topological order and topological entropy in classical systems (2006)
Castelnovo, Claudio, Chamon, Claudio
We show that the concept of topological order, introduced to describe ordered quantum systems which cannot be classified by broken symmetries, also applies to classical systems. Starting from a...
Electron fractionalization in two-dimensional graphenelike structures (2006)
Hou, Chang-Yu, Chamon, Claudio, Mudry, Christopher
Electron fractionalization is intimately related to topology. In one-dimensional systems, fractionally charged states exist at domain walls between degenerate vacua. In two-dimensional systems,...
Chamon, Claudio, Fradkin, Eduardo, Lopez, Ana
While the values for the fractional charge and fractional statistics coincide for fractional Hall (FQH) states in the Laughlin sequence, they do not for more general FQH states, such as those in the...
Hou, Chang-Yu, Chamon, Claudio
We study a tunneling geometry defined by a single point-contact constriction that brings to close vicinity two points sitting at the same edge of a quantum Hall liquid, shortening the trip between...
High-Temperature Criticality in Strongly Constrained Quantum Systems (2005)
Castelnovo, Claudio, Chamon, Claudio, Mudry, Christopher, Pujol, Pierre
The exotic nature of many strongly correlated materials at reasonably high temperatures, for instance cuprate superconductors in their normal state, has lead to the suggestion that such behavior...
Junctions of three quantum wires (2005)
Oshikawa, Masaki, Chamon, Claudio, Affleck, Ian
We study a junction of three quantum wires enclosing a magnetic flux. The wires are modeled as single-channel spinless Tomonaga-Luttinger liquids. This is the simplest problem of a quantum junction...
Shtengel, Kirill, Nayak, Chetan, Bishara, Waheb, Chamon, Claudio
In this letter, we analyse the following apparent paradox: as has been recently proved by Hastings (2004 Phys. Rev. 69 104431), under a general set of conditions, if a local Hamiltonian has a...
Castelnovo, Claudio, Chamon, Claudio, Mudry, Christopher, Pujol, Pierre
Quantum Hamiltonians that are fine-tuned to their so-called Rokhsar-Kivelson (RK) points, first presented in the context of quantum dimer models, are defined by their representations in preferred...
A sigma model approach to glassy dynamics (2005)
Chamon, Claudio, Cugliandolo, Leticia F
In this contribution we review recent progress in understanding fluctuations in the aging process of macroscopic systems, and we propose further tests of these ideas. We discuss how the emergence of...
A sigma model approach to glassy dynamics (2005)
Chamon, Claudio, Cugliandolo, Leticia F
In this contribution we review recent progress in understanding fluctuations in the aging process of macroscopic systems, and we propose further tests of these ideas. We discuss how the emergence of...
Castelnovo, Claudio, Chamon, Claudio, Mudry, Christopher, Pujol, Pierre
We construct a quantum extension of the (classical) three-coloring model introduced by Baxter [J.Math.Phys.11, 784 (1970)] for which the ground state can be computed exactly along a continuous line...
Junctions of three quantum wires and the dissipative Hofstadter model (2003)
Chamon, Claudio, Oshikawa, Masaki, Affleck, Ian
We study a junction of three quantum wires enclosing a magnetic flux. This is the simplest problem of a quantum junction between Tomonaga-Luttinger liquids in which Fermi statistics enter in a...
Adiabatic charge and spin transport in interacting quantum wires (2002)
Sharma, Prashant, Chamon, Claudio
We study charge and spin transport through an interacting quantum wire, caused by backscattering off an effective impurity potential with a periodic time-dependence. The adiabatic regime of this pump...
An Adiabatic Quantum Pump of Spin Polarized Current (2001)
Mucciolo, Eduardo R., Chamon, Claudio, Marcus, Charles M.
We propose a mechanism by which an open quantum dot driven by two ac (radio frequency) gate voltages in the presence of a moderate in-plane magnetic field generates a spin polarized, phase coherent...
Reply to Comment on ``Quantum Pump for Spin and Charge Transport in a Luttinger Liquid'' (2001)
Sharma, Prashant, Chamon, Claudio
We show that Feldman and Gefen's comment revolves around a trivial issue - the relative magnitudes for the two crossover scales in the problem.
Quantum pump for spin and charge transport in a Luttinger liquid (2000)
Sharma, Prashant, Chamon, Claudio
We study two different parametric pumps for interacting quantum wires, one for pumping spin currents, the other for charge currents. We find that the spin or charge pumped per cycle has a...
Non-equilibrium tunneling into general quantum Hall edge states (1999)
Moore, Joel E., Sharma, Prashant, Chamon, Claudio
In this paper we formulate the theory of tunneling into general Abelian fractional quantum Hall edge states. In contrast to the simple Laughlin states, a number of charge transfer processes must be...
Colored noise in the fractional Hall effect: duality relations and exact results (1999)
Chamon, Claudio, Freed, Denise
We study noise in the problem of tunneling between fractional quantum Hall edge states within a four probe geometry. We explore the implications of the strong-weak coupling duality symmetry existent...
Chamon, Claudio, Ludwig, Andreas W. W., Nayak, Chetan
We develop a dynamical approach based on the Schwinger-Keldysh formalism to derive a field-theoretic description of disordered and interacting electron systems. We calculate within this formalism the...
From particles to spins: Eulerian formulation of supercooled liquids and glasses
Chamon, Claudio, Cugliandolo, Leticia F., Fabricius, Gabriel, Iguain, José Luis, Weeks, Eric R.
The dynamics of supercooled liquid and glassy systems are usually studied within the Lagrangian representation, in which the positions and velocities of distinguishable interacting particles are...