Results 71 to 80 of about 1,673,449 (337)

Simulation of open-quantum-system dynamics using the quantum Zeno effect

Physical Review Research, 2020
We suggest a quantum simulator that allows to study the role of memory effects in the dynamics of open quantum systems. A particular feature of our simulator is the ability to engineer both Markovian and non-Markovian dynamics by means of quantum ...
Sabrina Patsch, Sabrina Maniscalco, Christiane P. Koch   +2 more
doaj   +1 more source

Can quantum regression theorem be reconciled with quantum fluctuation dissipation theorem ?

, 2002
In the attempt to derive the regression theorem from the fluctuation dissipation theorem several authors claim the violation of the former theorem in the quantum case.
Gruzinskis, V., Reggiani, L., Shiktorov, P., Starikov, E.   +3 more
core   +1 more source

Effect of dissipation on the decay-rate phase transition [PDF]

, 1998
A general condition for sharp transition of decay rate from quantum to thermal regimes is derived in dissipative tunneling models when position dependent mass is involved.
Kim, Hungsoo, Kim, Jae Kwan, lee, Soo-Young, Park, Chang Soo, Park, D. K.   +4 more
core   +2 more sources

Achieving Large and Anisotropic Spin‐Mediated Thermal Transport in Textured Quantum Magnets

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
An advanced solvent‐cast cold pressing method is developed to synthesize highly textured quantum magnets. By aligning spin chains in Ca2CuO3 perpendicular to the pressing direction, a spin‐mediated thermal conductivity of 10 ± 1 W m⁻¹ K⁻¹ is achieved, the highest reported for polycrystalline quantum materials.
Shucheng Guo, Xue Bai, Boqun Liang, Thomas Hoke, Ming Liu, Rafal E. Dunin‐Borkowski, Xi Chen   +6 more
wiley   +1 more source

Fidelity-dissipation relations in quantum gates

Physical Review Research
Accurate quantum computing relies on the precision of quantum gates. However, quantum gates in practice are generally affected by dissipative environments, which can significantly reduce their fidelity.
Tan Van Vu, Tomotaka Kuwahara, Keiji Saito   +2 more
doaj   +1 more source

Mixed-State Quantum Spin Liquids and Dynamical Anyon Condensations in Kitaev Lindbladians [PDF]

Quantum
Quantum spin liquids and anyons, used to be subjects of condensed matter physics, now are realized in various platforms of qubits, offering unprecedented opportunities to investigate fundamental physics of many-body quantum entangled states.
Kyusung Hwang
doaj   +1 more source

Dissipation-induced structural instability and chiral dynamics in a quantum gas [PDF]

Science, 2019
Chirality by dissipation Quantum many-body systems can display exotic dynamics in the presence of dissipation. Dogra et al. studied such dynamics in a system consisting of an atomic Bose-Einstein condensate located in an optical cavity and exposed to a ...
N. Dogra, M. Landini, K. Kroeger, L. Hruby, T. Donner, T. Esslinger   +5 more
semanticscholar   +1 more source

Terahertz‐Driven Ultrafast Dynamics of Rare‐Earth Nickelates by Controlling Only the Charge Degree of Freedom

Advanced Functional Materials, EarlyView.
The THz drive of the Mott insulating state of a rare‐earth nickelate induces instantaneous insulator‐metal transition via quantum tunneling of valence electrons across the bandgap. This transition is pure electronic and highly non‐thermal, which may find its applications in ultrafast opto‐electronics with enhanced performance and minimal device size ...
Gulloo Lal Prajapati, Sergey Kovalev, Igor Ilyakov, Atiqa Arshad, Gaurav Dubey, Ketan S. Navale, Dhanvir Singh Rana, Jan‐Christoph Deinert   +7 more
wiley   +1 more source

Synchrotron Radiation for Quantum Technology

Advanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader, Sakura Pascarelli, Klaus Attenkofer, Anna A. Makarova, Karsten Holldack, Kai Rossnagel, Kristiaan Temst, George Kourousias, Stefano Carretta, Caterina Biscari, Helmut Dosch   +10 more
wiley   +1 more source

Quantum violation of LGI under an energy constraint for different scenarios systems

Scientific Reports, 2023
In this paper, we consider a qubit in four scenarios: with drive, without drive, and in the presence of dissipation and dephasing, to investigate the quantum violation of the Leggett–Garg inequality (LGI) in an energy constraint.
Yuxia Zhang, Xiangguan Tan, Tianhui Qiu
doaj   +1 more source