31 citations · 52 across the 8 of their papers we have counts for
9 papers
Systematic errors from scalar slowing-down models in transient SERF magnetometry
Marek Kopciuch, M. Kopciuch, Harini Raghavan +3
Reduced Bloch models of spin-exchange-relaxation-free (SERF) magnetometers commonly describe the coupled electron--nuclear spin dynamics using a single nuclear slowing-down factor.…
Quantum Process Tomography of a Thermal Alkali-Metal Vapor
Yujie Sun, Marek Kopciuch, Arash Dezhang Fard +1
Characterizing the open-system dynamics of multilevel quantum systems (qudits) remains a fundamental challenge due to ensemble inhomogeneities and complex environmental interaction…
Liouvillian and Hamiltonian exceptional points of atomic vapors: The spectral signatures of quantum jumps
Marek Kopciuch, Adam Miranowicz
We investigate spectral singularities in an alkali-metal atomic vapor modeled using four and effectively three hyperfine states. By comparing the eigenvalue spectra of a non-Hermit…
Isolating Pure Quadratic Zeeman Splitting
Arash Dezhang Fard, Marek Kopciuch, Yujie Sun +2
Nonlinear magnetic interactions provide access to complex quantum spin dynamics and thus enable the study of intriguing physical phenomena. However, these interactions are often do…
Perfect quantum protractors
Michał Piotrak, Marek Kopciuch, Arash Dezhang Fard +3
In this paper we introduce and investigate the concept of a perfect quantum protractor, a pure quantum state that generates three different orthogonal bas…
Optimized experimental optical tomography of quantum states of room-temperature alkali-metal vapor
Marek Kopciuch, Magdalena Smolis, Adam Miranowicz +1
We demonstrate a novel experimental technique for quantum-state tomography of the collective density matrix. It is based on measurements of the polarization of light, traversing th…
Tailoring population transfer between two hyperfine ground states of Rb87
Aleksandra Sierant, Marek Kopciuch, Szymon Pustelny
In this paper, we investigate the coherent control over a complex multi-level atomic system using the stimulated Raman adiabatic passage (STIRAP). Based on the example of rubidium-…
Response of atomic spin-based sensors to magnetic and nonmagnetic perturbations
Mikhail Padniuk, Marek Kopciuch, Riccardo Cipolletti +3
Searches for pseudo-magnetic spin couplings require implementation of techniques capable of sensitive detection of such interactions. While Spin-Exchange Relaxation Free (SERF) mag…
Optical reconstruction of collective density matrix of qutrit
Marek Kopciuch, Szymon Pustelny
Reconstruction of a quantum state is of prime importance for quantum-information science. Specifically, means of efficient determination of a state of atoms of room-temperature vap…