Quantum Critical Point
Ferromagnetic Quantum Critical Point Avoided by the Appearance of Another Magnetic Phase in LaCrGe3 under Pressure
... ferromagnetic quantum critical point in LaCrGe 3 provides a clear example of avoided quantum criticality when a ferromagnetic transition is suppressed by a clean tuning parameter such as ...or ...
8
Transport studies of the itinerant metamagnet Sr₃Ru₂O₇ near its quantum critical point
... Certain electronic states occur universally, and across a great number of systems with different chemistries. A prominent example is that of the Lan- dau Fermi liquid. This phenomenological theory makes robust ...
169
Thermoelectric power investigations of YbAgGe across the quantum critical point
... antiferromagnetically ordered heavy fermion compound YbAgGe are measured across the field-induced quantum critical point. These TEP measurements reproduce the earlier H-T phase diagram and identify ...
12
Emergent Magnetic Degeneracy in Iron Pnictides due to the Interplay between Spin-Orbit Coupling and Quantum Fluctuations
... Introduction. — Magnetism in the iron pnictide super- conductors remains an intensely studied subject, not least due to its impact on unconventional superconductivity [1 – 3], but also as a playground for exploring ...
8
Two-point function of a d=2 quantum critical metal in the limit kF → ∞, Nf → 0 with NfkF fixed
... breaking quantum critical ...so-called quantum critical metals can be addressed in perturbation theory as first discussed by Hertz and Millis ...fixed point [6–9]. This unknown fixed ...
17
Evidence for a generic quantum transition in high Tc cuprates
... a critical electron density separating distinct ground ...a quantum critical point, electrons in metals are highly correlated and the diverging fluctuations may induce uncon- ventional ...the ...
5
Quantum melting of magnetic long-range order near orbital degeneracy: Classical phases and Gaussian fluctuations
... the point M, with classical energy of ⫺ ...infinite-order quantum critical point, since not only may the spins be chosen to be FM in certain planes, whence the or- bitals have to be tuned to ...
31
Non Fermi liquid behavior and anomalous suppression of Landau damping in layered metals close to ferromagnetism
... How robust are the numerical values of our exponents to extensions of the truncation scheme used for Γ Λ R ? The most obvious term to include would be the bosonic mass: in our calculation this was set to zero throughout, ...
5
Magnetic phase diagram of the iron pnictides in the presence of spin-orbit coupling: Frustration between C2 and C4 magnetic phases
... (ii) Degeneracies between different magnetic orders emerge close to the magnetic quantum critical point (QCP) due to the SOC. In the FeSC, a putative QCP is found as magnetism is suppressed by ...
21
Quantum order by disorder near criticality and the secret of partial order in MnSi
... of quantum phase transitions has proven fertile ground in the search for new quantum ...metallic quantum-critical points using the idea of quantum order by ...of quantum order by ...
5
Singularities in large deviations of work in quantum quenches
... a quantum quench across two different phases separated by a quantum critical point, using as an example the Dicke model quenched from its superradiant to its normal ...non-analytical ...
8
Quantum point contact as a probe of a topological superconductor
... Our model calculation is in accord with general theoretical considerations [12, 13], but may appear counter-intuitive. After all, the Majorana bound state no longer exists as an individual energy level if it is connected ...
11
Two-point functions in (loop) quantum cosmology
... in quantum cosmology is whether one restricts to positive or negative-frequency solutions or keeps both, and that the analogue of this frequency condition in full quantum gravity would be the spacetime ...
30
Zero Point Energy Effects on Quantum Electrodynamics
... The vacuum is not a state of empty space, but is populated by electromagnetic fluctuations at a lowest nonzero level, the Zero Point Energy (ZPE). As distinguished from conventional theories, such as that of the ...
5
Duality in Quantum Quenches and Classical Approximation Algorithms: Pretty Good or Very Bad
... and quantum algorithms which have a duality property: roughly, either the algorithm provides some nontrivial improvement over random or there exist many solutions which are significantly worse than ...The ...
21
Waiting times of entangled electrons in normal-superconducting junctions
... electron quantum optics [30] and the progress in single electron detection at high frequencies [4, 31, 32, 33], it is now relevant and possible to consider electron dynam- ics and time resolved quantities at ...
9
Quantum gravity from the point of view of locally covariant quantum field theory
... On the basis of the formalism developed in this paper one should be able to perform reliable calculations for quantum corrections to classical gravity, under the assumption that these cor- rections are small and ...
36
Quantum gravity from the point of view of locally covariant quantum field theory
... the renormalized version of the BV Laplacian. The condition (57) is called the quantum master equation. If we redefine time-ordered products in such a way that the anomaly is equal to 0, the above condition is ...
40
Thermo-electric properties of quantum point contacts
... We have used a current heating techniquef to ob- serve the characteristic quantum size effects in the thermo-electric properties of a quantum point contact. Our previous work on the quan[r] ...
8
Uniaxial stress technique and investigations into correlated electron systems
... four point resistance measurement can lead to signifi- cant offset errors if the common-mode voltage exceeds the level at which the preamplifier or lock-in amplifier can successfully reject ...and Quantum ...
199