Results 111 to 120 of about 11,924,253 (266)

Hamiltonian tomography: the quantum (system) measurement problem

New Journal of Physics, 2015
To harness the power of controllable quantum systems for information processing or quantum simulation, it is essential to be able to accurately characterise the system's Hamiltonian.
Jared H Cole
doaj   +1 more source

Boosting Conversion Efficiency in Zn3P2/InP Solar Cells Via Nanoscale Junction Engineering

Advanced Functional Materials, EarlyView.
This study demonstrates the efficacy of selective area epitaxy (SAE) in enhancing the conversion efficiency of a Zn3P2${\rm Zn}_3{\rm P}_2$/InP heterojunction solar cell. The impact of the SAE pattern dimensions on the performance parameters is investigated. Small size opening limits Jsc because of current crowding whereas large size opening limits Voc
Raphael Lemerle, Valerio Piazza, Andrea Filippo, Melanie Micali, Luna Warzawa, Thomas Hagger, Kamil Wodzislawski, Julien Hurni, Valentin Biselli, Ioannis Kalogerakis, Konstantinos Rogdakis, George Viskadouros, Emmanuel Kymakis, Esther Alarcon‐Llado, Anna Fontcuberta i Morral   +14 more
wiley   +1 more source

Quantum tomography of input-output processes [PDF]

Physical Review A, 2000
We demonstrate the possibility of practical tomographic determination of arbitrary input-output transformations. It is shown that the Liouville-space formalism provides a generalization of standard tomography encompassing the reconstruction of processes as well as of quantum states.
openaire   +2 more sources

Variational quantum process tomography of two-qubit maps

, 2013
Full characterization of quantum states and processes is a fundamental requirement for verification and benchmarking of quantum devices. It has been realized in systems with few components, but for larger systems it becomes unfeasible because of the ...
OSELLAME, ROBERTO, CRESPI, ANDREA, RAMPONI, ROBERTA, Roberto Osellame, Vianna, Reinaldo O, MILANI, Giorgio, MATALONI, Paolo, SCIARRINO, Fabio, Andrea Crespi, SANSONI, LINDA, Reinaldo O. Vianna, Roberta Ramponi   +11 more
core   +1 more source

Direct Integration of Conductive, Emissive Perovskite Nanocrystals Into Efficient Light‐Emitting Diodes Without Post‐Synthetic Ligand Exchange

Advanced Functional Materials, EarlyView.
We demonstrate the direct integration of CsPbBr3 perovskite nanocrystals (PNCs) into optoelectronic devices without post‐synthetic ligand exchange. This is achieved by synthesizing PNCs stabilized by strong‐binding‐energy oleylammonium–bromide pairs instead of oleate ligands. The resultant low ligand density and minimized surface defects enhance charge
Jigeon Kim, Yubin Lee, Gyeong Eun Seok, Dong Gyu Lee, Seongwon Lee, Huieun Kim, Sung Woo Jang, Wooyeon Kim, Wondo Choi, Woo Hyeon Jeong, Donghun Lee, Min Jae Ko, Won Bin Im, Jinhan Cho, Tae Kyung Lee, Bo Ram Lee, Younghoon Kim   +16 more
wiley   +1 more source

Quantum memory advantage for quantum process tomography

Quantum process tomography, the task of learning an unknown quantum channel from black-box access, is a central problem in quantum information. In this setting, protocols with quantum memory can coherently store and jointly process quantum information obtained from multiple channel uses, whereas protocols without quantum memory must measure after each ...
Bravo-Prieto, Carlos, Gong, Weiyuan, Mele, Antonio Anna   +2 more
openaire   +2 more sources

Fullerene‐Mediated Iodine Immobilization at Buried Interfaces in Sn–Pb Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
Indene‐C60 bisadduct (ICBA) accumulates at the buried interface of inverted tin‐lead perovskite solar cells, limiting undesired electron extraction while maintaining efficient hole transport. ICBA simultaneously scavenges molecular iodine, mitigating Sn2+ oxidation and interfacial recombination. This coupled electronic‐chemical regulation delivers 22.7%
Chi‐Jing Huang, Yi‐Sheng Lin, Matyas Daboczi, Yueyao Dong, Anuj Kumar Singh, Luis Lanzetta, Yun‐Shan Li, Chang‐Hao Wang, Huan‐Wei Lin, Wei‐Jia Qiu, Yi‐Ting He, Chun‐Fu Chang, Sanjayan Sathasivam, Derya Baran, Thomas J. Macdonald, Chieh‐Ting Lin   +15 more
wiley   +1 more source

Direct measurement of large-scale quantum states via expectation values of non-Hermitian matrices

Nature Communications, 2016
Quantum state tomography is the process of retrieving the values that define a quantum system, but realizing it experimentally can be burdensome. Here, the authors provide an alternative approach via the expectation values of a set of non-Hermitian ...
Eliot Bolduc, Genevieve Gariepy, Jonathan Leach   +2 more
doaj   +1 more source

Economical standard quantum process tomography

, 2010
Recently, Bendersky \emph{et al.} developed a method to complete the task of characterizing an arbitrary $χ$ matrix element in a scalable way, Phys. Rev. Lett. Vol. \textbf{100}, 190403(2008), where an auxiliary system was needed. In present work, we shall show that the same task can also be completed within the scheme of standard quantum process ...
Wu, Xiaohua, Xu, Ke
openaire   +2 more sources

Thermoresponsive Soft and Self‐Anchoring Cuff Electrode for Chronic Peripheral Interfaces

Advanced Functional Materials, EarlyView.
A novel thermoresponsive, soft and self‐anchoring (TSSA) cuff electrode utilizing shape memory polymers achieves autonomous, sutureless peripheral nerve fixation. Driven by thermally induced pre‐strain and tissue adhesion, the device self‐closes and softens at body temperature, successfully minimizing mechanical mismatch. This adaptive platform ensures
Seungjun Lee, Byungwook Park, Jonghee Eun, Sohee Kim, Namsun Chou   +4 more
wiley   +1 more source