Results 131 to 140 of about 63,478 (260)
Information Geometry of Complex Hamiltonians and Exceptional Points
Entropy, 2013 Information geometry provides a tool to systematically investigate the parameter sensitivity of the state of a system. If a physical system is described by a linear combination of eigenstates of a complex (that is, non-Hermitian) Hamiltonian, then there ...
Dorje C. Brody, Eva-Maria Graefe
doaj +1 more source
Modified Extremal Kähler Metrics and Multiplier Hermitian–Einstein Metrics
The Journal of Geometric Analysis25 pages, fixed a mistake in the abstract, added some sentences in the ...
Yasuhiro Nakagawa, Satoshi Nakamura
openaire +3 more sources
Quantum‐Noise‐Driven Generative Diffusion Models
Advanced Quantum Technologies, EarlyView.Diffusion Models (DMs) are today a very popular class of generative models for Machine Learning (ML), using a noisy dynamics to learn an unknown density probability of a finite set of samples in order to generate new synthetic data. This study proposes a method to generalize them into the quantum domain by introducing and investigating what are termed ...
Marco Parigi +2 more
wiley +1 more source
Efficient Simulation of Open Quantum Systems on NISQ Trapped‐Ion Hardware
Advanced Quantum Technologies, EarlyView.Open quantum systems exhibit rich dynamics that can be simulated efficiently on quantum computers, allowing us to learn more about their behavior. This work applies a new method to simulate certain open quantum systems on noisy trapped‐ion quantum hardware.
Colin Burdine +3 more
wiley +1 more source
We study the stability at blow-up and deformations of a class of Hermitian metrics whose fundamental two-form $ω$ satisfies the condition $\partial \bar \partial ω^k=0$, for any $k$ between 1 and $n-1$ (where $n$ is the complex dimension of the manifold). We are motivated by the existence of compact complex manifold supporting such metrics.
openaire +2 more sources
Advanced Quantum Technologies, EarlyView.This work proposes a photon subtraction scheme, termed ′photon culling′, that enables the selective extraction of a single photon based on its arrival time relative to other photons. This scheme enables the generation of multi‐photon Fock states with high fidelity and modal purity, demonstrating significant potential for quantum metrology applications ...
Abdolreza Pasharavesh, Michal Bajcsy
wiley +1 more source
The Metric Operator and the Functional Integral Formulation of Pseudo-Hermitian Quantum Mechanics
Acta Polytechnica, 2007 Pseudo-Hermitian quantum theories are those in which the Hamiltonian H satisfies H† = ηHη-1, where η = e-Q is a positive-definite Hermitian operator, rather than the usual H† = H.
H. F. Jones
doaj
Nonreciprocal Entanglement of Frequency‐Distinct Qubits
Advanced Quantum Technologies, EarlyView.This work demonstrates the first spatiotemporal superconducting metasurface for nonreciprocal entanglement between frequency‐mismatched qubits at millikelvin temperatures. Leveraging space‐time‐modulated Josephson field‐effect transistors (JoFETs), the platform enables unidirectional, spurious‐free quantum state conversion with high efficiency.
Sajjad Taravati
wiley +1 more source
Quasicomplex N=2, d=1 Supersymmetric Sigma Models
Symmetry, Integrability and Geometry: Methods and Applications, 2013 We derive and discuss a new type of N=2 supersymmetric quantum mechanical sigma models which appear when the superfield action of the (1,2,1) multiplets is modified by adding an imaginary antisymmetric tensor to the target space metric, thus completing ...
Evgeny A. Ivanov, Andrei V. Smilga
doaj +1 more source
Dark Excitonic State Preparation in a Symmetry‐Protected Open Quantum Battery
Advanced Quantum Technologies, EarlyView.An optical charging protocol is presented for an excitonic quantum battery that prepares the system in a symmetry‐protected dark excited state. Using a continuous‐wave laser followed by controlled relaxation, the system stores energy in a state resilient to environmental losses. Abstract Previous work (J. Phys. Chem.
Zohreh Khodadad +2 more
wiley +1 more source