| Original language | English (US) |
|---|---|
| Article number | 1230043 |
| Journal | Modern Physics Letters A |
| Volume | 27 |
| Issue number | 40 |
| DOIs | |
| State | Published - Dec 28 2012 |
Bibliographical note
Funding Information:I am grateful to Adi Armoni, Sasha Gorsky, Sasha Polyakov, and Arkady Vainshtein for useful comments. This work was supported in part by DOE grant DE-FG02-94ER40823.