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arXiv research

A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

169,051 papers · 148 categories

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141282422563 · Jun 202019922001200920182026
48 results for quantum projective space

The abstract discusses financial irreversibility using quantum mechanics and projective geometry.

problem Financial irreversibility and its limitations in trading strategies.
method Projective geometry and Taylor expansion of directed distance in quantum systems.
result Fundamental asymmetry under state exchange is a key factor in financial irreversibility.

Paper solves quantum differential equations for projective bundles using Borel multitransforms.

problem Integration of quantum differential equations for P1\mathbb P^1-bundles.
method Introduced Borel (α,β)(\alpha, \beta)-multitransforms to reconstruct solutions.
result Quantum analog of Leray-Hirsch theorem for quantum cohomology of P1\mathbb P^1-bundles.

Researchers create projective representations of Hecke groups using TQFT.

problem Constructing projective representations of Hecke groups.
method Using Witten-Reshetikhin-Turaev topological quantum field theory of higher genus surfaces.
result The representation's image group is infinite at low levels in genus 2.

Quantum methods model uncertain volatility in financial markets.

problem Modeling financial asset prices with uncertain volatility.
method Quantum stochastic calculus with unitary and non-unitary time evolution.
result Different volatility levels encoded in quantum states, leading to varied market price evolutions.

We give a direct calculation of the curvature of the Hitchin connection, in geometric quantization on a symplectic manifold, using only differential geometric techniques. In particular, we establish that the curvature acts as a first-order operator on the quantum spaces. Projective flatness follows if the Kähler struct…

2014-09-03abs ↗pdf ↗

This work constructs a finite-dimensional projective representation for a quantum Teichmüller model.

problem Quantum Teichmüller theory and its finite-dimensional representation.
method Explicit construction using cyclic quantum dilogarithm and mutations of coefficients.
result Reconstruction of quantum Teichmüller space with explicit intertwiners.

We derive the quantum Teichmüller space, previously constructed by Kashaev and by Fock and Chekhov, from tensor products of a single canonical representation of the modular double of the quantum plane. We show that the quantum dilogarithm function appears naturally in the decomposition of the tensor square, the quantum…

2010-06-19abs ↗pdf ↗

We show that using the family of adapted Kähler polarizations of the phase space of a compact, simply connected, Riemannian symmetric space of rank-1, the obtained field HcorrH^{corr} of quantum Hilbert spaces produced by geometric quantization including the half-form correction is flat if MM is the 3-dimensional sphere …

2012-04-04abs ↗pdf ↗

Generalizes quantum integrability to all signatures for projectively equivalent metrics.

problem Quantum integrability for Beltrami-Laplace operators across various signatures.
method Shows that Killing tensors constructed from projectively equivalent metrics correspond to commuting differential operators.
result Quantum integrability for Beltrami-Laplace operators is established for all signatures.

Quantum models improve reinforcement learning in complex spaces.

problem Limited quantum enhancements in reinforcement learning.
method Introducing energy-based models and projective simulation, leveraging quantum algorithms to speed up classical sampling methods.
result Quantum models provide significant learning advantages over classical neural networks in complex environments.

SQS uses quantum kernels to improve credit scoring with fewer data points.

problem Credit scoring models struggle with scarce and skewed data.
method Systemic Quantum Score (SQS) leverages quantum kernels for better pattern extraction.
result SQS shows improved performance and pattern extraction with fewer data points.

Quantum cohomology gives a finite dimensional integrable system via the Dubrovin connection. Motivated by Givental's work on mirror symmetry, we use gauge theory techniques and the Frobenius Integrability Theorem to find flat sections for the Dubrovin connection. An explicit calculation is given for projective space.

2000-10-11abs ↗pdf ↗

Restricts quantum representations of mapping class groups to integral coefficients.

problem Integrality of non-semisimple quantum representations of mapping class groups.
method Exhibits explicit bases of states spaces that span Z[ζ]\mathbb{Z}[ζ]-lattices invariant under mapping class groups.
result Restricts quantum representations to integral coefficients from Q(ζ)\mathbb{Q}(ζ) to Z[ζ]\mathbb{Z}[ζ].

We define convex projective structures on 2D surfaces with holes and investigate their moduli space. We prove that this moduli space is canonically identified with the higher Teichmuller space for the group PSL_3 defined in our paper math/0311149. We define the quantum version of the moduli space of convex projective s…

2004-05-18abs ↗pdf ↗

Paper studies Frobenius manifolds and quantum differential equations, proving Dubrovin Conjecture for Hirzebruch surfaces.

problem Quantum differential equations and their solutions in Gromov-Witten theory.
method Introduces cyclic strata, Borel-Laplace multitransforms, and integral representations.
result Proof of Dubrovin Conjecture for Hirzebruch surfaces.

Geodesic flows on Kähler manifolds are quantum integrable when metrics are c-projectively equivalent.

problem Quantum integrability of geodesic flows on Kähler manifolds under c-projective equivalence.
method Construction of Poisson-commuting integrals of motion and their quantum counterparts.
result The geodesic flow's integrals of motion commute as quantum operators, leading to separation of variables in Schrödinger's equation.

We introduce and study a superversion of Dubrovin's notion of semisimple Frobenius manifolds. We establish a correspondence between semisimple Frobenius (super)manifolds and special solutions to the (supersymmetric) Schlesinger equations. Finally, we calculate the Schlesinger initial conditions for solutions describing…

1997-02-21abs ↗pdf ↗

MPE framework proves universal approximation for quantum data distribution.

problem Challenges in generating quantum data from underlying distributions.
method Many-body Projected Ensemble (MPE) framework for quantum state design.
result MPE can approximate any quantum distribution within 1-Wasserstein distance error.

Quantum machine learning for 2D classification tasks using optimized feature maps.

problem Classifying data points in finite feature space with quantum machine learning.
method Optimized quantum feature maps and classical model training.
result Exponentially better scaling of deployed kernels in qubit number.

Unified framework combines trace-induced quantum kernels for improved machine learning models.

problem Improving performance of quantum machine learning models using trace-induced kernels.
method Developed a unified framework combining various trace-induced quantum kernels, including global fidelity and local projected kernels, as Lego kernels.
result Local projected kernels can achieve comparable performance to global fidelity kernels with fewer quantum resources.

Study shows quantum behavior near infinity in metric asymptotics.

problem Quantum behavior of metrics near infinity on quasi-projective manifolds.
method Analysis of Bergman kernel function near smooth divisor at infinity of Cheng-Yau metric.
result Quantum phenomenon observed for points very close to the divisor at infinity.

Develops a new geometric framework for quantum metrics.

problem Quantum metric generalization for pure two-qubit states.
method Support-projected Petz monotone geometry for pure two-qubit families.
result Strictly generalizes SLD/Bures case and includes other metrics.

Wigner's theorem asserts that an isometric (probability conserving) transformation on a quantum state space must be generated by a Hamiltonian that is Hermitian. It is shown that when the Hermiticity condition on the Hamiltonian is relaxed, we obtain the following complex generalisation of Wigner's theorem: a holomorph…

2013-05-03abs ↗pdf ↗

Projective simulation converges to optimal behavior in Markov decision processes.

problem Optimizing reinforcement learning in Markov decision processes.
method Projective simulation framework applied to reinforcement learning.
result Projective simulation converges to optimal behavior in a large class of Markov decision processes.

We introduce the notion of a "state function" for framed tangles in a disk. After choosing a finite set of states for each marked disk, a state function is a projection from the vector space spanned by all tangles to the vector space spanned by the states, that is local, and topologically invariant. Given the states fo…

2018-06-25abs ↗pdf ↗

By the quantization condition compact quantizable Kaehler manifolds can be embedded into projective space. In this way they become projective varieties. The quantum Hilbert space of the Berezin-Toeplitz quantization (and of the geometric quantization) is the projective coordinate ring of the embedded manifold. This all…

2000-05-31abs ↗pdf ↗

A cluster variety of Fock and Goncharov is a scheme constructed by gluing split algebraic tori, called seed tori, via birational gluing maps called mutations. In quantum theory, the ring of functions on seed tori are deformed to non-commutative rings, represented as operators on Hilbert spaces. Mutations are quantized …

2016-02-02abs ↗pdf ↗

In this paper we propose a geometrization of the non-relativistic quantum mechanics for mixed states. Our geometric approach makes use of the Uhlmann's principal fibre bundle to describe the space of mixed states and as a novelty tool, to define a dynamic-dependent metric tensor on the principal manifold, such that the…

2013-02-06abs ↗pdf ↗

We sketch our recent application of a non-commutative version of the Cartan `moving-frame' formalism to the quantum Euclidean space RqNR^N_q, the space which is covariant under the action of the quantum group SOq(N)SO_q(N). For each of the two covariant differential calculi over RqNR^N_q based on the RR-matrix formalism, we…

2000-07-07abs ↗pdf ↗

In the quantum Teichmuller theory, based on Penner coordinates, the mapping class groups of punctured surfaces are represented projectively. The case of a genus three surface with one puncture is worked out explicitly. The projective factor is calculated. It is given by the exponential of the Liouville central charge.

1998-11-24abs ↗pdf ↗

Quantum theory uses modular group representations to assign invariants to 3-manifolds.

problem Assigning invariants to 3-manifolds via modular group representations.
method Projective representations of the modular group derived from a noncommutative torus.
result Computed traces and determinants of matrices associated with modular group elements.

FSPA bypasses eigenvalue estimation for quantum PCA, achieving optimal complexity and robustness.

problem Quantum PCA eigenvalue estimation is computationally expensive and prone to errors.
method Filtered Spectral Projection Algorithm (FSPA) that projects onto the dominant spectral subspace directly.
result FSPA achieves optimal complexity and robustness, outperforming classical methods.

Quantum kernels can be efficiently embedded into classical feature spaces.

problem Can all quantum kernels be efficiently embedded into classical feature spaces?
method Invoking computational universality and using techniques like random Fourier features, the authors show that certain classes of quantum kernels can be efficiently embedded.
result For shift-invariant and composition kernels, embedding quantum kernels are universal and efficient.

We develop a geometric approach to quantum mechanics based on the concept of the Tulczyjew triple. Our approach is genuinely infinite-dimensional and including a Lagrangian formalism in which self-adjoint (Schroedinger) operators are obtained as Lagrangian submanifolds associated with the Lagrangian. As a byproduct we …

2017-11-17abs ↗pdf ↗

In "Isomonodromy aspects of the tt* equations of Cecotti and Vafa I. Stokes data" (arxiv:1209.2045) we described all smooth solutions of the two-function tt*-Toda equations in terms of asymptotic data, holomorphic data, and monodromy data. In this supplementary article we focus on the holomorphic data and its interpret…

2012-09-11abs ↗pdf ↗