Pointwise bounds on confined states in non-relativistic QED
- URL: http://arxiv.org/abs/2307.14986v3
- Date: Mon, 10 Feb 2025 14:56:30 GMT
- Title: Pointwise bounds on confined states in non-relativistic QED
- Authors: M. Griesemer, V. Kußmaul,
- Abstract summary: We show that eigenstates satisfy a subsolution estimate in non-relativistic quantum electrodynamics.<n>We also give a proof of pointwise exponential decay in the electronic configuration.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: Kato's well known distributional inequality for the magnetic Laplacian holds equally in the more general setting of non-relativistic quantum electrodynamics (QED), where the wave function is vector-valued and the vector potential is quantized. We give two new applications of this result: First, we show that eigenstates satisfy a subsolution estimate. Second, for general states, with energy distribution strictly below the ionization threshold, we give a short proof of pointwise exponential decay in the electronic configuration.
Related papers
- Quantum optical scattering by macroscopic lossy objects: A general approach [55.2480439325792]
We develop a general approach to describe the scattering of quantum light by a lossy macroscopic object placed in vacuum.
We exploit the input-output relation to connect the output state of the field to the input one.
We analyze the impact of the classical transmission and absorption dyadics on the transitions from ingoing to outgoing s-polariton.
arXiv Detail & Related papers (2024-11-27T17:44:29Z) - Completeness of Energy Eigenfunctions for the Reflectionless Potential in Quantum Mechanics [0.0]
We prove that the set of bound (discrete) states together with the scattering (continuum) states of the reflectionless potential form a complete set.
In the case of a single bound state, the corresponding wave function can be found from the knowledge of continuum eigenstates of the system.
arXiv Detail & Related papers (2024-11-22T13:53:55Z) - Many-Body Quantum Geometric Dipole [0.0]
Collective excitations of many-body electron systems can carry internal structure, tied to the quantum geometry of the Hilbert space in which they are embedded.
We demonstrate in this work that this property can be formulated in a generic way, which does not require wavefunctions expressed in terms of single particle-hole states.
Our study demonstrates that the QGD is an intrinsic property of collective modes which is valid beyond approximations one might make for their wavefunctions.
arXiv Detail & Related papers (2024-06-17T21:01:03Z) - A non-hermitean momentum operator for the particle in a box [49.1574468325115]
We show how to construct the corresponding hermitean Hamiltonian for the infinite as well as concrete example.
The resulting Hilbert space can be decomposed into a physical and unphysical subspace.
arXiv Detail & Related papers (2024-03-20T12:51:58Z) - Eigenvalues asymptotics of unbounded operators. Two-photon quantum Rabi
model [0.0]
We consider different cases of compact, relatively compact, selfadjoint or nonselfadjoint perturbations.
We give an original proof of the Perelomov factorization theorem for operator of quantum optics.
arXiv Detail & Related papers (2023-12-09T19:27:20Z) - Real-time dynamics of false vacuum decay [49.1574468325115]
We investigate false vacuum decay of a relativistic scalar field in the metastable minimum of an asymmetric double-well potential.
We employ the non-perturbative framework of the two-particle irreducible (2PI) quantum effective action at next-to-leading order in a large-N expansion.
arXiv Detail & Related papers (2023-10-06T12:44:48Z) - The Potential Inversion Theorem [0.0]
We prove the potential inversion theorem, which says that wavefunction probability in these models is preserved under the sign inversion of the potential energy.
We show how the potential inversion theorem illustrates several seemingly unrelated physical phenomena, including Bloch oscillations, localization, particle-hole symmetry, negative potential scattering, and magnetism.
arXiv Detail & Related papers (2023-05-12T05:32:53Z) - Nonclassical properties of a deformed atom-cavity field state [4.0997147446591775]
We analyze a nonclassical state produced by an atom-cavity field interaction.
We use deforming the field operators and introducing nonlinearity to the classic Jaynes-Cummings model.
arXiv Detail & Related papers (2023-04-11T15:11:48Z) - Field theory approach to eigenstate thermalization in random quantum
circuits [0.0]
We use field-theoretic methods to explore the statistics of eigenfunctions of the Floquet operator for a large family of quantum circuits.
The correlation function of the quasienergy eigenstates is calculated and shown to exhibit random matrix circular unitary ensemble statistics.
arXiv Detail & Related papers (2022-10-12T18:00:00Z) - Concentration bounds for quantum states and limitations on the QAOA from
polynomial approximations [17.209060627291315]
We prove concentration for the following classes of quantum states: (i) output states of shallow quantum circuits, answering an open question from [DPMRF22]; (ii) injective matrix product states, answering an open question from [DPMRF22]; (iii) output states of dense Hamiltonian evolution, i.e. states of the form $eiota H(p) cdots eiota H(1) |psirangle for any $n$-qubit product state $|psirangle$, where each $H(
arXiv Detail & Related papers (2022-09-06T18:00:02Z) - Partition of kinetic energy and magnetic moment in dissipative
diamagnetism [20.218184785285132]
We analyze dissipative diamagnetism, arising due to dissipative cyclotron motion in two dimensions, in the light of the quantum counterpart of energy equipartition theorem.
The expressions for kinetic energy and magnetic moment are reformulated in the context of superstatistics.
arXiv Detail & Related papers (2022-07-30T08:07:28Z) - Driven anti-Bragg subradiant states in waveguide quantum electrodynamics [91.3755431537592]
We study theoretically driven quantum dynamics in periodic arrays of two-level qubits coupled to the waveguide.
We demonstrate, that strongly subradiant eigenstates of the master equation for the density matrix emerge under strong coherent driving for arrays with the anti-Bragg periods.
arXiv Detail & Related papers (2022-02-21T11:36:55Z) - Effect of Emitters on Quantum State Transfer in Coupled Cavity Arrays [48.06402199083057]
We study the effects of atoms in cavities which can absorb and emit photons as they propagate down the array.
Our model is equivalent to previously examined spin chains in the one-excitation sector and in the absence of emitters.
arXiv Detail & Related papers (2021-12-10T18:52:07Z) - Deformed Explicitly Correlated Gaussians [58.720142291102135]
Deformed correlated Gaussian basis functions are introduced and their matrix elements are calculated.
These basis functions can be used to solve problems with nonspherical potentials.
arXiv Detail & Related papers (2021-08-10T18:23:06Z) - Excited states from eigenvector continuation: the anharmonic oscillator [58.720142291102135]
Eigenvector continuation (EC) has attracted a lot attention in nuclear structure and reactions as a variational resummation tool for many-body expansions.
This work is dedicated to a detailed understanding of the emergence of excited states from the eigenvector continuation approach.
arXiv Detail & Related papers (2021-08-05T19:28:25Z) - On computing bound states of the Dirac and Schr\"odinger Equations [0.0]
We show that by changing the parameter, we can always find the bound states that satisfy the original equations and are normalizable.
While for the non-relativistic equations these properties may not be surprising, it is remarkable that the same holds for the relativistic equations.
arXiv Detail & Related papers (2021-07-05T20:00:20Z) - Quantum concentration inequalities [12.56413718364189]
We establish transportation cost inequalities (TCI) with respect to the quantum Wasserstein distance.
We prove Gibbs states of commuting Hamiltonians on arbitrary hypergraphs $H=(V,E)$ satisfy a TCI with constant scaling as $O(|V|)$.
We argue that the temperature range for which the TCI holds can be enlarged by relating it to recently established modified logarithmic Sobolev inequalities.
arXiv Detail & Related papers (2021-06-30T05:44:12Z) - Dimerization of many-body subradiant states in waveguide quantum
electrodynamics [137.6408511310322]
We study theoretically subradiant states in the array of atoms coupled to photons propagating in a one-dimensional waveguide.
We introduce a generalized many-body entropy of entanglement based on exact numerical diagonalization.
We reveal the breakdown of fermionized subradiant states with increase of $f$ with emergence of short-ranged dimerized antiferromagnetic correlations.
arXiv Detail & Related papers (2021-06-17T12:17:04Z) - Eigenstate thermalization in dual-unitary quantum circuits: Asymptotics
of spectral functions [0.0]
The eigenstate thermalization hypothesis provides to date the most successful description of thermalization in isolated quantum systems.
We study the distribution of matrix elements for a class of operators in dual-unitary quantum circuits.
arXiv Detail & Related papers (2021-03-22T09:46:46Z) - A non local phase field model of Bohm's quantum potential [0.0]
Bohm's quantum potential and the Madelung equation are identically obtained.
Some of the hypotheses that led to the formulation of quantum mechanics admit a classical interpretation based on non-locality.
arXiv Detail & Related papers (2021-03-04T17:07:40Z) - Hilbert-space geometry of random-matrix eigenstates [55.41644538483948]
We discuss the Hilbert-space geometry of eigenstates of parameter-dependent random-matrix ensembles.
Our results give the exact joint distribution function of the Fubini-Study metric and the Berry curvature.
We compare our results to numerical simulations of random-matrix ensembles as well as electrons in a random magnetic field.
arXiv Detail & Related papers (2020-11-06T19:00:07Z) - Kernel Method based on Non-Linear Coherent State [10.557942353553859]
We re-interpret the process of encoding inputs in quantum states as a non-linear feature map.
Non-linear coherent states can be considered as natural generalisation of associated kernels.
We study impact of geometrical properties of feature space, obtaining by non-linear coherent states, on the SVM classification task.
arXiv Detail & Related papers (2020-07-15T05:07:44Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.