Dr. Daniel Rohrlich

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Born: 1954, USA

Academic Qualifications:

• B.A. 1975, Princeton U., USA
• M.A. 1981, U.C. Berkeley, USA

• Ph.D. 1986, S.U.N.Y. Stony Brook, USA

• A.P.S. Outstanding Referee, 2008
• Itamar Pitowsky Prize, 2012

Academic Position:

Researcher 
Atom Chip Group and Physics Department
Ben Gurion University of the Negev
Beersheba 84105
ISRAEL

Research Interests:

Fundamental aspects and effects of quantum mechanics; quantum measurements; quantum information; cold-atom physics; Bose-Einstein condensates; path integrals; field theory

Research Projects:

Interferometry of clocks; "weak" values in theory and in atomic physics; a new axiomatic basis for quantum mechanics; retrocausality in and beyond quantum mechanics; see also "John Templeton Foundation grant" and "Israel Science Foundation grant" (listed below).

Abstracts of Current Research:

• D. Rohrlich, Stronger-than-quantum bipartite correlations violate relativistic causality in the classical limit. [Submitted to Phys. Rev. Lett.] Superquantum ("PR-box") correlations, though designed to respect relativistic causality, violate  relativistic causality in the classical limit. Generalizing to all stronger-than-quantum bipartite correlations, I derive Tsirelson's bound from the axioms of nonlocality, relativistic causality and the existence of a classical limit. This derivation of Tsirelson's bound does not assume quantum mechanics yet suggests how Hilbert space is implicit in quantum correlations.  See also PR-box correlations have no classical limit.
  

• Y. Aharonov, S. Popescu, D. Rohrlich and P. Skrzypczyk, Quantum Cheshire Cats. 
  New J. Phys. 15 (2013) 113015.  In this paper we present a quantum Cheshire Cat.  In a 
  pre- and post-selected experiment we find the Cat in one place, and its grin in another. The Cat is a photon, while the grin is its circular polarization.  See also T. Denkmayr et al., Observation of a quantum Cheshire Cat in a matter-wave interferometer experiment.  Nat. Commun. 5, 4492 (2014).

• Y. Aharonov, S. Popescu and D. Rohrlich, On conservation laws in quantum mechanics.   We raise fundamental questions about the very meaning of conservation laws in quantum mechanics and we argue that the standard way of dening conservation laws, while perfectly valid as far as it goes, misses essential features of nature and has to be revisited and extended.

Some recent publications:

• Y. Margalit, Z. Zhou, S. Machluf, D. Rohrlich, Y. Japha, and R. Folman, A self-interfering clock as a "which path" witness. Science, 349, 1205 (2015), arXiv:1505.05765v1. See also M. Arndt and C. Brand, Science 349, 1168 (2015).  There is also a cartoon version.
• Y. Aharonov, E. Cohen and D. Rohrlich, Nonlocality of the Aharonov-Bohm effect.  Phys. Rev. A93, 042110 (2016).
• D. Rohrlich, A reasonable thing that just might work.  To appear in Quantum Nonlocality and Reality – 50 Years of Bell’s theorem, eds. S. Gao and M. Bell (Cambridge U. Press), 2015.
• G. Hetzroni and D. Rohrlich, Protective measurements and the PBR theorem.  In Protective Measurement and Quantum Reality: Towards a New Understanding of Quantum Mechanics, ed. Shan Gao (Cambridge U. Press), 2014, pp. 135-144.
• D. Rohrlich, PR-box correlations have no classical limit.  In Quantum Theory:  A Two-Time Success Story [Yakir Aharonov Festschrift], eds. D. C. Struppa and J. M. Tollaksen (Milan: Springer), 2013, pp. 205-211.

Keywords: quantum effects, nonlocality, quantum information, decoherence, path integrals, clock interferometry

Links:	Scientific publications	Lost causes in physics, by R. F. Streater
	Quantum Paradoxes	Physical constants and units from N.I.S.T.
	Atom Chip Group	Papers of great American physicists
	John Templeton Foundation grant	Quantum (Information) Theory meetings
	Israel Science Foundation grant

Phones:

1. Phone: 08-6479408, 02-5637840, 02-5637173
2. Fax: 08-6479264

Email:

rohrlich@bgu.ac.il

Last updated:  1 August 2016