Shashank Virmani



Research interests

My research concerns quantum information theory and all things related to the complexity of quantum systems. Previous and ongoing research interests include: the study of entanglement, fault tolerant quantum computation (and the foundations of quantum theory), characterisation and local (or "locc-al") discrimination of quantum quantum systems, and the effects of correlated errors on quantum systems. Preprints to all my publications can be found on the quant-ph arXiv ( or on Brunel's research archives.

Selected Publications

Journal articles

Anwar, H. , Virmani, S. , Jevtic, S. , Rudolph, O.  and Virmani, S.   (2015)   'Smallest state spaces for which bipartite entangled quantum states are separable'. New Journal of PhysicsDownload publication 

Anwar, H. , Jevtic, S. , Rudolph, O.  and Virmani, S.   (2014)   'Families of pure PEPS with efficiently simulatable local hidden variable models for most measurements'. arXivDownload publication 

Virmani, S.  and Ratanje, N.   (2012)   'Exploiting non-quantum entanglement to widen applicability of limited-entanglement classical simulations of quantum systems'. arXiv

Ratanje, N.  and Virmani, S.   (2011)   'Generalized state spaces and nonlocality in fault-tolerant quantum-computing schemes'. Physical Review A - Atomic, Molecular, and Optical Physics, 83 (3).  doi: 10.1103/PhysRevA.83.032309 Download publication 

Plenio, MB.  and Virmani, S.   (2010)   'Upper bounds on fault tolerance thresholds of noisy Clifford-based quantum computers'. New Journal of Physics, 12 doi: 10.1088/1367-2630/12/3/033012 Download publication 

Wunderlich, H. , Virmani, S.  and Plenio, MB.   (2010)   'Highly efficient estimation of entanglement measures for large experimentally created graph states via simple measurements'. NEW JOURNAL OF PHYSICS, 12 pp. . doi: 10.1088/1367-2630/12/8/083026 

Hayashi, M. , Markham, D. , Murao, M. , Owari, M.  and Virmani, S.   (2009)   'The geometric measure of entanglement for a symmetric pure state with non-negative amplitudes'. Journal of Mathematical Physics, 50 (12).  doi: 10.1063/1.3271041 Download publication 

Hayashi, M. , Markham, D. , Murao, M. , Owari, M.  and Virmani, S.   (2008)   'Entanglement of multiparty-stabilizer, symmetric, and antisymmetric states'. PHYSICAL REVIEW A, 77 (1).  pp. . doi: 10.1103/PhysRevA.77.012104 

Plenio, MB.  and Virmani, S.   (2008)   'Many-body physics and the capacity of quantum channels with memory'. New Journal of Physics, 10 doi: 10.1088/1367-2630/10/4/043032 Download publication 

Plenio, MB.  and Virmani, S.   (2007)   'An introduction to entanglement measures'. QUANTUM INFORMATION & COMPUTATION, 7 (1-2).  pp. 1 - 51. 

Markham, D. , Miyake, A.  and Virmani, S.   (2007)   'Entanglement and local information access for graph states'. NEW JOURNAL OF PHYSICS, 9 pp. . doi: 10.1088/1367-2630/9/6/194 

Brandao, FGSL. , Horodecki, M. , Plenio, MB.  and Virmani, S.   (2007)   'Remarks on the equivalence of full additivity and monotonicity for the entanglement cost'. OPEN SYSTEMS & INFORMATION DYNAMICS, 14 (3).  pp. 333 - 339. doi: 10.1007/s11080-007-9056-0 

Plenio, MB.  and Virmani, S.   (2007)   'Spin chains and channels with memory'. PHYSICAL REVIEW LETTERS, 99 (12).  pp. . doi: 10.1103/PhysRevLett.99.120504 

Hayashi, M. , Markham, D. , Murao, M. , Owari, M.  and Virmani, S.   (2006)   'Bounds on multipartite entangled orthogonal state discrimination using local operations and classical communication'. PHYSICAL REVIEW LETTERS, 96 (4).  pp. . doi: 10.1103/PhysRevLett.96.040501 

Virmani, S. , Huelga, SF.  and Plenio, MB.   (2005)   'Classical simulability, entanglement breaking, and quantum computation thresholds'. PHYSICAL REVIEW A, 71 (4).  pp. . doi: 10.1103/PhysRevA.71.042328 

Rudolph, T.  and Virmani, SS.   (2005)   'A relational quantum computer using only two-qubit total spin measurement and an initial supply of highly mixed single-qubit states'. NEW JOURNAL OF PHYSICS, 7 pp. . doi: 10.1088/1367-2630/7/1/228 

Macchiavello, C. , Palma, GM.  and Virmani, S.   (2004)   'Transition behavior in the channel capacity of two-quibit channels with memory'. PHYSICAL REVIEW A, 69 (1).  pp. . doi: 10.1103/PhysRevA.69.010303 

Virmani, S.  and Plenio, MB.   (2003)   'Construction of extremal local positive-operator-valued measures under symmetry'. PHYSICAL REVIEW A, 67 (6).  pp. . doi: 10.1103/PhysRevA.67.062308 

Virmani, S. , Sacchi, MF. , Plenio, MB.  and Markham, D.   (2001)   'Optimal local discrimination of two multipartite pure states'. PHYSICS LETTERS A, 288 (2).  pp. 62 - 68. doi: 10.1016/S0375-9601(01)00484-4 

Audenaert, K. , Eisert, J. , Jane, E. , Plenio, MB. , et al.   (2001)   'Asymptotic relative entropy of entanglement'. PHYSICAL REVIEW LETTERS, 87 (21).  pp. . doi: 10.1103/PhysRevLett.87.217902 

Plenio, MB. , Virmani, S.  and Papadopoulos, P.   (2000)   'Operator monotones, the reduction criterion and the relative entropy'. JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 33 (22).  pp. L193 - L197. doi: 10.1088/0305-4470/33/22/101 

Galvao, EF. , Plenio, MB.  and Virmani, S.   (2000)   'Tripartite entanglement and quantum relative entropy'. JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 33 (48).  pp. 8809 - 8818. doi: 10.1088/0305-4470/33/48/316 

Virmani, S.  and Plenio, MB.   (2000)   'Ordering states with entanglement measures'. PHYSICS LETTERS A, 268 (1-2).  pp. 31 - 34. doi: 10.1016/S0375-9601(00)00157-2 

Conference papers

Virmani, S. , Huelga, SF.  and Plenio, MB.   (2005)   'Classical simulability, entanglement breaking, and quantum computation thresholds' , Conference on Fluctuations and Noise in Photonics and Quantum Optics III. Austin, TX. 1 - 26 May. SPIE-INT SOC OPTICAL ENGINEERING, pp. 144 - 157. doi: 10.1117/12.611662 

Page last updated: Tuesday 28 April 2015