158 citations · 1.8k across the 54 of their papers we have counts for
6 papers · 1 filter
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…
Collective many-body dynamics in a solid-state quantum sensor controlled through nanoscale magnetic gradients
Piotr Put, Nathaniel T. Leitao, Haoyang Gao +13
Coherent collective dynamics of strongly interacting qubits are a central resource in quantum information science, with applications from quantum computing and simulation to metrol…
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…
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…