Darrell Schroeter
Reed Physics
For most of the articles below, clicking on the thumbnail will take you to a PDF of the article. The names of student co-authors are in blue.
Parent Hamiltonian for the chiral spin liquid
Ronny Thomale, Eliot Kapit, Darrell F. Schroeter, and Martin Greiter
Physical Review B 80, 104406 (2009)
We present a method for constructing parent Hamiltonians for the chiral spin liquid. We find two distinct Hamiltonians for which the chiral spin liquid on a square lattice is an exact zero-energy ground state. We diagonalize both Hamiltonians numerically for 16-site lattices, and find that the chiral spin liquid, modulo its twofold topological degeneracy, is indeed the unique ground state for one Hamiltonian and not for the other.
Spin Hamiltonian for which the Chiral Spin Liquid is the Exact Ground State
Darrell F. Schroeter, Eliot Kapit, Ronny Thomale, and Martin Greiter
Physical Review Letters 99, 097202 (2007)
We construct a Hamiltonian that singles out the chiral spin liquid on a square lattice with periodic boundary conditions as the exact and, apart from the twofold topological degeneracy, unique ground state.
Self-electroporation as a Model for Fusion Pore Formation
Prashant Luitel, Darrell F. Schroeter, and John W. Powell
Journal of Biomolecular Structure & Dynamics 24, 495 (2007)
The creation of a small opening called the fusion pore is a necessary prerequisite for neurotransmitter release from synaptic vesicles. It is known that high-intensity electric fields can create pores in vesicles by a process called electroporation.
Spin Hamiltonian for the quantum Hall state in a ladder geometry
Eliot Kapit, Prashant Luitel, and Darrell F. Schroeter
Physical Review B 73, 075310 (2006)
The first calculation of the true ground state of the parent Hamiltonian proposed by Laughlin [Laughlin, Ann. Phys. 191, 163, (1989)] for the m=2 fractional quantum Hall state on a torus is presented.
Orbital antiferromagnetism in coupled planar systems
Darrell F. Schroeter and Sebastian Doniach
Physical Review B 69, 094407 (2004)
A realistic model for the electronic structure of SrRuO3 is examined to determine the possibility of orbital antiferromagnetic order in this material.
Revisiting Laughlin’s Hamiltonian for the chiral spin liquid
Darrell F. Schroeter
Annals of Physics 310, 155 (2004).
It is demonstrated that finding a parent Hamiltonian for the chiral spin liquid remains an open problem.
Three-dimensional flux states as a model for the pseudogap phase of transition metal oxides
Darrell F. Schroeter and Sebastian Doniach
Physical Review B 66, 075120 (2002)
We propose that the pseudogap state observed in the transition metal oxides can be explained by a three-dimensional flux state, which exhibits spontaneously generated currents in its ground state due to electron-electron correlations.
Effect of drug-binding-induced deformation on the vibrational spectrum of a DNA•daunomycin complex
Y. Z. Chen, A. Szabó, Darrell F. Schroeter, John W. Powell, and S. A. Lee, and E. W. Prohofsky
Physical Review E 55, 7414 (1997)
Vibrational frequencies of a DNA•daunomycin complex and those of a free DNA helix and an isolated daunomycin are calculated and compared with the infrared spectrum of similar systems at frequencies above 600 cm-1.
Defect-assisted relaxation in quantum dots at low temperature
Darrell F. Schroeter, David J. Griffiths, and Peter C. Sercel
Physical Review B 54, 1486 (1996)
A model for electron relaxation in a quantum dot, including a nonradiative pathway through a point defect, is presented, using time-dependent perturbation theory. It is found that relaxation through defects may circumvent the phonon bottleneck predicted for ideal nanometer-scale quantum dot structures, even at low temperatures.
Ronny Thomale, Eliot Kapit, Darrell F. Schroeter, and Martin Greiter
Physical Review B 80, 104406 (2009)
We present a method for constructing parent Hamiltonians for the chiral spin liquid. We find two distinct Hamiltonians for which the chiral spin liquid on a square lattice is an exact zero-energy ground state. We diagonalize both Hamiltonians numerically for 16-site lattices, and find that the chiral spin liquid, modulo its twofold topological degeneracy, is indeed the unique ground state for one Hamiltonian and not for the other.
Darrell F. Schroeter, Eliot Kapit, Ronny Thomale, and Martin Greiter
Physical Review Letters 99, 097202 (2007)
We construct a Hamiltonian that singles out the chiral spin liquid on a square lattice with periodic boundary conditions as the exact and, apart from the twofold topological degeneracy, unique ground state.
Prashant Luitel, Darrell F. Schroeter, and John W. Powell
Journal of Biomolecular Structure & Dynamics 24, 495 (2007)
The creation of a small opening called the fusion pore is a necessary prerequisite for neurotransmitter release from synaptic vesicles. It is known that high-intensity electric fields can create pores in vesicles by a process called electroporation.
Eliot Kapit, Prashant Luitel, and Darrell F. Schroeter
Physical Review B 73, 075310 (2006)
The first calculation of the true ground state of the parent Hamiltonian proposed by Laughlin [Laughlin, Ann. Phys. 191, 163, (1989)] for the m=2 fractional quantum Hall state on a torus is presented.
Darrell F. Schroeter and Sebastian Doniach
Physical Review B 69, 094407 (2004)
A realistic model for the electronic structure of SrRuO3 is examined to determine the possibility of orbital antiferromagnetic order in this material.
Darrell F. Schroeter
Annals of Physics 310, 155 (2004).
It is demonstrated that finding a parent Hamiltonian for the chiral spin liquid remains an open problem.
Darrell F. Schroeter and Sebastian Doniach
Physical Review B 66, 075120 (2002)
We propose that the pseudogap state observed in the transition metal oxides can be explained by a three-dimensional flux state, which exhibits spontaneously generated currents in its ground state due to electron-electron correlations.
Y. Z. Chen, A. Szabó, Darrell F. Schroeter, John W. Powell, and S. A. Lee, and E. W. Prohofsky
Physical Review E 55, 7414 (1997)
Vibrational frequencies of a DNA•daunomycin complex and those of a free DNA helix and an isolated daunomycin are calculated and compared with the infrared spectrum of similar systems at frequencies above 600 cm-1.
Darrell F. Schroeter, David J. Griffiths, and Peter C. Sercel
Physical Review B 54, 1486 (1996)
A model for electron relaxation in a quantum dot, including a nonradiative pathway through a point defect, is presented, using time-dependent perturbation theory. It is found that relaxation through defects may circumvent the phonon bottleneck predicted for ideal nanometer-scale quantum dot structures, even at low temperatures.