Quantum algorithms for quantum dynamics
Among the many computational challenges faced across different disciplines, quantum-
mechanical systems pose some of the hardest ones and offer a natural playground for the …
mechanical systems pose some of the hardest ones and offer a natural playground for the …
Challenges for develo** photo-induced phase transition (PIPT) systems: from classical (incoherent) to quantum (coherent) control of PIPT dynamics
This work reviews the experimental studies on photo-induced cooperative phenomena
(photo-induced phase transitions, PIPT), which are related to ultrafast structural and …
(photo-induced phase transitions, PIPT), which are related to ultrafast structural and …
Nature of Symmetry Breaking at the Excitonic Insulator Transition:
Ta 2 NiSe 5 is one of the most promising materials for hosting an excitonic insulator ground
state. While a number of experimental observations have been interpreted in this way, the …
state. While a number of experimental observations have been interpreted in this way, the …
Superradiant quantum materials
There is currently great interest in the strong coupling between the quantized photon field of
a cavity and electronic or other degrees of freedom in materials. A major goal is the creation …
a cavity and electronic or other degrees of freedom in materials. A major goal is the creation …
Coherent order parameter oscillations in the ground state of the excitonic insulator Ta2NiSe5
D Werdehausen, T Takayama, M Höppner… - Science …, 2018 - science.org
The excitonic insulator is an intriguing electronic phase of condensed excitons. A prominent
candidate is the small bandgap semiconductor Ta2NiSe5, in which excitons are believed to …
candidate is the small bandgap semiconductor Ta2NiSe5, in which excitons are believed to …
Strong Coupling Nature of the Excitonic Insulator State in
We analyze the measured optical conductivity spectra using the density-functional-theory-
based electronic structure calculation and density-matrix renormalization group calculation …
based electronic structure calculation and density-matrix renormalization group calculation …
The spontaneous symmetry breaking in Ta2NiSe5 is structural in nature
The excitonic insulator is an electronically driven phase of matter that emerges upon the
spontaneous formation and Bose condensation of excitons. Detecting this exotic order in …
spontaneous formation and Bose condensation of excitons. Detecting this exotic order in …
Imaging the coherent propagation of collective modes in the excitonic insulator Ta2NiSe5 at room temperature
Excitonic insulators host a condensate of electron-hole pairs at equilibrium, giving rise to
collective many-body effects. Although several materials have emerged as excitonic …
collective many-body effects. Although several materials have emerged as excitonic …
Antiferroelectric distortion with anomalous phonon softening in the excitonic insulator
Ta 2 NiSe 5 is considered a promising excitonic insulator (EI) candidate, in which the EI
state is due to Coulomb interaction between electrons and holes. In Ta 2 NiSe 5, the role of …
state is due to Coulomb interaction between electrons and holes. In Ta 2 NiSe 5, the role of …
Electrical Tuning of the Excitonic Insulator Ground State of
We demonstrate that the excitonic insulator ground state of Ta 2 NiSe 5 can be electrically
controlled by electropositive surface adsorbates. Our studies utilizing angle-resolved …
controlled by electropositive surface adsorbates. Our studies utilizing angle-resolved …