التفاصيل البيبلوغرافية
| العنوان: |
Experimental simulation and limitations of quantum walks with trapped ions. |
| المؤلفون: |
Matjeschk, R., Schneider, Ch., Enderlein, M., Huber, T., Schmitz, H., Glueckert, J., Schaetz, T. |
| المصدر: |
New Journal of Physics; 2012, Vol. 14 Issue 3, p1-30, 30p |
| مصطلحات موضوعية: |
ION traps, QUANTUM theory, BINOMIAL distribution, PROBABILITY theory, COMPUTER algorithms |
| مستخلص: |
We examine the prospects of discrete quantum walks (QWs) with trapped ions. In particular, we analyze in detail the limitations of the protocol of Travaglione and Milburn (2002 Phys. Rev. A 65 032310) that has been implemented by several experimental groups in recent years. Based on the first realization in our group (Schmitz et al 2009 Phys. Rev. Lett. 103 090504), we investigate the consequences of leaving the scope of the approximations originally made, such as the Lamb-Dicke approximation. We explain the consequential deviations from the idealized QW for different experimental realizations and an increasing number of steps by taking into account higherorder terms of the quantum evolution. It turns out that these already become significant after a few steps, which is confirmed by experimental results and is currently limiting the scalability of this approach. Finally, we propose a new scheme using short laser pulses, derived from a protocol from the field of quantum computation. We show that this scheme is not subject to the abovementioned restrictions and analytically and numerically evaluate its limitations, based on a realistic implementation with our specific setup. Implementing the protocol with state-of-the-art techniques should allow for substantially increasing the number of steps to 100 and beyond and should be extendable to higher-dimensional QWs. [ABSTRACT FROM AUTHOR] |
|
Copyright of New Journal of Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder