Nuclear Theory·nucl-th

Friday·May 23, 2025

8 papers—4 primary·4 cross-listed

05
Bloch oscillation with a diatomic tight-binding model on quantum computers
Peng Guo🇺🇸 · Jaime Park🇺🇸 · Frank X. Lee🇺🇸
We aim to explore a more efficient way to simulate few-body dynamics on quantum computers. Instead of mapping the second quantization of the system Hamiltonian to qubit Pauli gates representation via the Jordan-Wigner transform, we propose to use the few-body Hamiltonian matrix under the statevector basis representation which is more economical on the required number of quantum registers. For a single-particle excitation state on a one-dimensional chain, $Γ$ qubits can simulate $N = 2^{Γ}$ number of sites, in comparison to $N$ qubits for $N$ sites via the Jordan-Wigner approach. A two-band diatomic tight-binding model is used to demonstrate the effectiveness of the statevector basis representation. Both one-particle and two-particle quantum circuits are constructed and some numerical tests on IBM hardware are presented.
↳ quant-phcond-mat.mes-hallcond-mat.otherhep-lat+1PRResearch(2025)·3 citations
06
Hidden-Charm Tetraquarks in a Mixture Model: Coupled-Channel Analysis with $c c ˉ$ and Hadronic Molecular Components
Kotaro Miyake🇯🇵 · Yasuhiro Yamaguchi🇯🇵
The nature of the $X (3872)$ and other exotic hadrons has been a subject of extensive investigation since the first observation of the $X (3872)$ in 2003. While various theoretical models have been proposed, including hadronic molecular and compact tetraquark interpretations, some experimental evidence suggests that the $X (3872)$ may be a mixture state of a hadronic molecule and a $c c ˉ$ core. In this work, we perform a systematic study of the hidden-charm tetraquark candidates $X (3860)$ , $X (3872)$ , and $Z (3930)$ using a coupled-channel model that incorporates both $c c ˉ$ states and $D^{(*)} D ˉ^{(*)}$ hadronic molecular components. The $c c ˉ$ sector is described based on the constituent quark model predictions for the $χ_{c J} (2 P)$ ( $J = 0, 1, 2$ ) states, while the meson-meson interactions are modeled using pseudoscalar and vector meson exchange potentials. The model parameters are fixed to reproduce the masses of the $X (3872)$ and $Z (3930)$ , and the resulting framework is used to predict the mass and structure of the $J^{P C} = 0^{++}$ state associated with the $X (3860)$ . Our results support the mixture interpretation of these exotic hadrons, exhibiting strong attractions from the transition potential between $c c ˉ$ and $D^{(*)} D ˉ^{(*)}$ components. The molecular component is found to dominate in the $X (3872)$ , while the $c c ˉ$ component plays a more prominent role in the $X (3860)$ and $Z (3930)$ .
↳ hep-phnucl-thPRD(2025)·5 citations
07
Lattice study of correlators of chromoelectric fields for heavy quarkonium dynamics in the quark-gluon plasma
Nora Brambilla🇩🇪 · Saumen Datta🇮🇳 · Marc Janer🇩🇪 · Viljami Leino🇩🇪 · Julian Mayer-Steudte🇩🇪 · Peter Petreczky🇺🇸 · Antonio Vairo🇩🇪
We perform a lattice calculation of the correlators of two chromoelectric fields in the adjoint representation connected by adjoint Wilson lines at non-zero temperature. These correlators arise in the study of quarkonium dynamics and of adjoint heavy quark diffusion in deconfined matter. We work in SU(3) gauge theory using either gradient flow or multi-level algorithms for noise reduction, and discuss the renormalization of the correlators on the lattice. We find that a Casimir factor rescaling relates the adjoint correlators corresponding to the diffusion of an adjoint heavy quark and the octet-octet quarkonium transitions to the chromoelectric correlator in the fundamental representation describing the diffusion of a heavy quark.
↳ hep-lathep-phnucl-thPRD(2025)·10 citations
08
The chromoelectric adjoint correlators in Euclidean space at next-to-leading order
Nora Brambilla🇩🇪 · Panayiotis Panayiotou🇩🇪 · Saga Säppi🇩🇪 · Antonio Vairo🇩🇪
The physics of quarkonium created in heavy-ion collisions is intrinsically connected to the correlation functions of adjoint chromoelectric fields in quantum chromodynamics. We study such correlation functions in a weak-coupling expansion in a thermal medium. We identify three distinct gauge-invariant correlators, and evaluate them to next-to-leading order. Two of the resulting correlators turn out to be asymmetric. We pinpoint the source of this asymmetry to Matsubara zero modes associated with Wilson lines. The results are shown to agree well with recent lattice calculations at high temperatures.
↳ hep-phhep-latnucl-thJHEP(2025)·5 citations

Affiliations

first authorsco-authorsvia INSPIRE

Bloch oscillation with a diatomic tight-binding model on quantum computers

Hidden-Charm Tetraquarks in a Mixture Model: Coupled-Channel Analysis with ccˉ and Hadronic Molecular Components

Lattice study of correlators of chromoelectric fields for heavy quarkonium dynamics in the quark-gluon plasma

The chromoelectric adjoint correlators in Euclidean space at next-to-leading order

Affiliations

Hidden-Charm Tetraquarks in a Mixture Model: Coupled-Channel Analysis with $c c ˉ$ and Hadronic Molecular Components