Research Interests
Theoretical Quantum Optics & Quantum Information
Physical implementation of quantum information processing and communication
Information is physical - it is stored, processed and readout by physical systems.
With the tremendous progress in information technology and ever shrinking size
of optics and microelectronics, very soon purely quantum effects, associated
with the superposition and entanglement, will start to play an important role in
the information contents of physical systems representing bits. This in part
motivated the birth of Quantum Information Theory, which is based on quantum
principles and which extends and generalizes the classical information theory.
The field of quantum information is currently attracting enormous interest in view
of its fundamental nature and its potentially revolutionary applications to
computation and secure communication. Essentially, the implementation aspects of
quantum information processing have by now become an integral part of modern
physics and in particular quantum optics.
P. Lambropoulos and D. Petrosyan,
Fundamentals of Quantum Optics and Quantum Information
(Springer, 2007);
eBook
Optical quantum computation and communication -
Photons are very robust and versatile carriers of quantum information.
The absence of practical single-photon sources and the weakness of
optical nonlinearities in conventional media are, however, the major
obstacles for realizing deterministic quantum logic with photons.
We study the potential of coherently
driven atomic ensembles for efficient control and manipulation of
photonic qubits.
D. Petrosyan, J. Otterbach and M. Fleischhauer,
Phys. Rev. Lett. 107, 213601 (2011)
D. Petrosyan and M. Fleischhauer,
Phys. Rev. Lett. 100, 170501 (2008)
D. Petrosyan,
J. Opt. B 7, S141 (2005);
Phys. Rev. A 76, 053823 (2007)
D. Petrosyan and Yu. P. Malakyan,
Phys. Rev. A
70, 023822 (2004)
E. Shahmoon, G. Kurizki, M. Fleischhauer and D. Petrosyan,
Phys. Rev. A 83, 033806 (2011)
I. Friedler, D. Petrosyan, M. Fleischhauer and G. Kurizki,
Phys. Rev. A 72, 043803 (2005)
I. Friedler, G. Kurizki and D. Petrosyan,
Europhys. Lett.
68, 625 (2004);
Phys. Rev. A 71, 023803 (2005)
D. Petrosyan and G. Kurizki,
Phys. Rev. A 65, 033833 (2002);
Phys. Rev. A 64, 023810 (2001)
Quantum information processing with scalable hybrid systems -
Solid-state systems are promising candidates, both principally and
technologically, for practical realization of a scalable quantum computer.
We explore hybrid schemes that can incorporate the advantageous properties
of quantum-optical and solid-state systems.
G. Bensky, R. Amsüss, J. Majer, D. Petrosyan, J. Schmiedmayer and G. Kurizki,
Quantum Inf. Process. 10, 1037 (2011)
D. Petrosyan, G. Bensky, G. Kurizki, I. Mazets, J. Majer and J. Schmiedmayer,
Phys. Rev. A 79, 040304(R) (2009)
D. Petrosyan and G. Kurizki,
Phys. Rev. Lett. 89, 207902 (2002);
Quantum Information & Computation 6, 1 (2006)
(quant-ph/0411188)
Quantum dynamics in periodic structures
Quantum dynamics of many-body systems in periodic potentials is one of the
central topics of modern quantum optics. Such systems are also relevant to
the physical implementation of quantum information processing, for which an
ensemble of isolated from the environment but individually addressable qubits
(atoms, electrons, superconducting qubits, etc.) can constitute very promising
scalable platform.
Cold atoms in optical lattices -
Recently, spectacular progress has been achieved in cooling and trapping
atoms in optical lattices. The relevant parameters of these systems can
be controlled with very high precision and can be tuned to implement
with unprecedented accuracy some of the fundamental models of condensed
matter physics. Cold atoms in optical lattices can therefore serve as
"quantum simulators" for the studies of many-body dynamics in periodic potentials.
G.M. Nikolopoulos and D. Petrosyan,
J. Phys. B 43, 131001 (2010)
M. Valiente, D. Petrosyan and A. Saenz,
Phys. Rev. A 81, 011601(R) (2010);
Phys. Rev. A 81, 066101 (2010)
M. Valiente and D. Petrosyan,
Europhys. Lett. 83, 30007 (2008);
J. Phys. B 41, 161002 (2008);
J. Phys. B 42, 121001 (2009)
B. Schmidt, M. Bortz, S. Eggert, M. Fleischhauer and D. Petrosyan,
Phys. Rev. A 79, 063634 (2009)
D. Petrosyan, B. Schmidt, J. R. Anglin and M. Fleischhauer,
Phys. Rev. A 76, 033606 (2007)
D. Muth, D. Petrosyan and M. Fleischhauer,
Phys. Rev. A 85, 013615 (2012)
Optimal state transfer and entanglement in spin chains
D. Petrosyan, G. M. Nikolopoulos and P. Lambropoulos,
Phys. Rev. A 81, 042307 (2010)
D. Petrosyan and P. Lambropoulos,
Opt. Commun. 264, 419 (2006)
G. M. Nikolopoulos, D. Petrosyan and P. Lambropoulos,
J. Phys.: Condens. Matter 16, 4991 (2004);
Europhys. Lett. 65, 297 (2004)
Electromagnetically induced transparency (EIT) in atomic ensembles and its applications
D. Petrosyan, J. Otterbach and M. Fleischhauer,
Phys. Rev. Lett. 107, 213601 (2011)
D. Petrosyan and Yu. P. Malakyan,
Phys. Rev. A 70, 023822 (2004);
Phys. Rev. A 61, 53820 (2000)
G. Katsoprinakis, D. Petrosyan and I. K. Kominis,
Phys. Rev. Lett. 97, 230801 (2006)
D. Petrosyan,
J. Opt. B 7, S141 (2005);
Phys. Rev. A 76, 053823 (2007)