Erratum: Optimal Strategies for Estimating the Average Fidelity of Quantum Gates [Phys. Rev. Lett.111, 200401 (2013)]

2015 ◽  
Vol 114 (23) ◽  
Author(s):  
Daniel M. Reich ◽  
Giulia Gualdi ◽  
Christiane P. Koch
Keyword(s):  
Optimal Strategies ◽  
Quantum Gates ◽  
Average Fidelity

scholarly journals Optimal Strategies for Estimating the Average Fidelity of Quantum Gates

2013 ◽  
Vol 111 (20) ◽  
Author(s):  
Daniel M. Reich ◽  
Giulia Gualdi ◽  
Christiane P. Koch
Keyword(s):  
Optimal Strategies ◽  
Quantum Gates ◽  
Average Fidelity

An Introduction to Uncertain Futures

2018 ◽  
Author(s):  
Jens Beckert ◽  
Richard Bronk
Keyword(s):  
Optimal Strategies ◽  
Theoretical Framework ◽  
Objective Probability ◽  
Political Debate ◽  
Probability Functions ◽  
Market Economies ◽  
Socially Constructed ◽  
The Future ◽  
Radical Uncertainty ◽  
Calculative Practices

This chapter provides a theoretical framework for considering how imaginaries and narratives interact with calculative devices to structure expectations and beliefs in the economy. It analyses the nature of uncertainty in innovative market economies and examines how economic actors use imaginaries, narratives, models, and calculative practices to coordinate and legitimize action, determine value, and establish sufficient conviction to act despite the uncertainty they face. Placing the themes of the volume in the context of broader trends in economics and sociology, the chapter argues that, in conditions of widespread radical uncertainty, there is no uniquely rational set of expectations, and there are no optimal strategies or objective probability functions; instead, expectations are often structured by contingent narratives or socially constructed imaginaries. Moreover, since expectations are not anchored in a pre-existing future reality but have an important role in creating the future, they become legitimate objects of political debate and crucial instruments of power in markets and societies.

scholarly journals DECOMPOSITION OF UNITARY MATRICES AND QUANTUM GATES

2013 ◽  
Vol 11 (01) ◽  
pp. 1350015 ◽  
Author(s):  
CHI-KWONG LI ◽  
REBECCA ROBERTS ◽  
XIAOYAN YIN
Keyword(s):  
General Scheme ◽  
Quantum Gate ◽  
Quantum Gates ◽  
Unitary Matrix ◽  
Additional Structure ◽  
Unitary Matrices ◽  
Decomposition Scheme ◽  
Single Qubit ◽  
Matlab Program

A general scheme is presented to decompose a d-by-d unitary matrix as the product of two-level unitary matrices with additional structure and prescribed determinants. In particular, the decomposition can be done by using two-level matrices in d - 1 classes, where each class is isomorphic to the group of 2 × 2 unitary matrices. The proposed scheme is easy to apply, and useful in treating problems with the additional structural restrictions. A Matlab program is written to implement the scheme, and the result is used to deduce the fact that every quantum gate acting on n-qubit registers can be expressed as no more than 2n-1(2n-1) fully controlled single-qubit gates chosen from 2n-1 classes, where the quantum gates in each class share the same n - 1 control qubits. Moreover, it is shown that one can easily adjust the proposed decomposition scheme to take advantage of additional structure evolving in the process.

scholarly journals Teaching Ethics and Professionalism: A National Survey of Ophthalmology Residency Program Directors

2021 ◽  
Vol 13 (01) ◽  
pp. e88-e94
Author(s):  
Alyssa M. Kretz ◽  
Jennifer E. deSante-Bertkau ◽  
Michael V. Boland ◽  
Xinxing Guo ◽  
Megan E. Collins
Keyword(s):  
Residency Program ◽  
Online Survey ◽  
Optimal Strategies ◽  
Program Directors ◽  
Global Evaluation ◽  
Teaching Ethics ◽  
Residency Programs ◽  
Unprofessional Behavior ◽  
Residency Program Directors ◽  
Trainee Competence

Abstract Background While ethics and professionalism are important components of graduate medical education, there is limited data about how ethics and professionalism curricula are taught or assessed in ophthalmology residency programs. Objective This study aimed to determine how U.S. ophthalmology residency programs teach and assess ethics and professionalism and explore trainee preparedness in these areas. Methods Directors from accredited U.S. ophthalmology residency programs completed an online survey about components of programs' ethics and professionalism teaching curricula, strategies for assessing competence, and trainee preparedness in these areas. Results Directors from 55 of 116 programs (46%) responded. The most common ethics and professionalism topics taught were informed consent (38/49, 78%) and risk management and litigation (38/49, 78%), respectively; most programs assessed trainee competence via 360-degree global evaluation (36/48, 75%). While most (46/48, 95%) respondents reported that their trainees were well or very well prepared at the time of graduation, 15 of 48 (31%) had prohibited a trainee from graduating or required remediation prior to graduation due to unethical or unprofessional conduct. Nearly every program (37/48, 98%) thought that it was very important to dedicate curricular time to teaching ethics and professionalism. Overall, 16 of 48 respondents (33%) felt that the time spent teaching these topics was too little. Conclusion Ophthalmology residency program directors recognized the importance of an ethics and professionalism curriculum. However, there was marked variation in teaching and assessment methods. Additional work is necessary to identify optimal strategies for teaching and assessing competence in these areas. In addition, a substantial number of trainees were prohibited from graduating or required remediation due to ethics and professionalism issues, suggesting an impact of unethical and unprofessional behavior on resident attrition.

Sign in / Sign up

Export Citation Format

Share Document