Professor Sandu Popescu

Search results

• 2021

  A dynamical quantum Cheshire Cat effect and implications for counterfactual communication

  Aharonov, Y., Cohen, E. & Popescu, S., Dec 2021, In: Nature Communications. 12, 1, 4770.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  File

  • Particles 100%
  • Communications 100%
  • Particle 85%
  • Quantum 71%
  • Counter-factual 57%
  5 Citations (Scopus)

  62 Downloads (Pure)

• Error Correction of Quantum Reference Frame Information

  Popescu, S., Hayden, P., Nezami, S. & Salton, G., 18 Feb 2021, In: PRX Quantum. 010326 .

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  File
  51 Downloads (Pure)

• On conservation laws in quantum mechanics

  Aharonov, Y., Popescu, S. & Rohrlich, D., 5 Jan 2021, In: Proceedings of the National Academy of Sciences of the United States of America. 118 , 1, e1921529118.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  • Quantum 100%
  • Quantum Mechanics 100%
  • Meaning 33%
  • Standard 33%
• 2020

  Constraints on nonlocality in networks from no-signaling and independence

  Gisin, N., Bancal, J-D., Cai, Y., Remy, P., Tavakoli, A., Zambrini Cruzeiro, E., Popescu, S. & Brunner, N., 13 May 2020, In: Nature Communications. 11, 1, 2378.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  File

  • Networks 100%
  • Correlation 100%
  • Signaling 60%
  • Simulation Mode 40%
  • Output 40%
  29 Citations (Scopus)

  40 Downloads (Pure)

• Reference frames which separately store noncommuting conserved quantities

  Popescu, S., Sainz, A. B., Short, A. J. & Andreas, W., 24 Aug 2020, In: Physical Review Letters. 125, 5 p., 090601.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  File

  • Battery 100%
  • Spin 100%
  • Thermodynamics 100%
  • Particle 100%
  • Angular Momentum 100%
  8 Citations (Scopus)

  88 Downloads (Pure)
• 2019

  Exploring the limits of no backwards in time signalling

  Guryanova, Y., Silva, R. F., Short, A. J., Skrzypczyk, P., Brunner, N. & Popescu, S., 9 Dec 2019, In: Quantum. 3, 24 p., 211.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  File

  • Signaling 100%
  • Simulation Mode 66%
  • Spatial Correlation 33%
  • Correlation 33%
  4 Citations (Scopus)

  91 Downloads (Pure)
• 2018

  Quantum reference frames and their applications to thermodynamics

  Popescu, S., Sainz, A. B., Short, T. & Winter, A., 13 Jul 2018, In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 376, 2123, 13 p., 20180111.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  File

  • Reference Frame 100%
  • Conserved Quantity 60%
  • Thermodynamics 40%
  • Subsystems 40%
  • Applications 20%
  20 Citations (Scopus)

  367 Downloads (Pure)
• 2017

  Connecting processes with indefinite causal order and multi-time quantum states

  Silva, R., Guryanova, Y., Short, T., Skrzypczyk, P., Brunner, N. & Popescu, S., Oct 2017, In: New Journal of Physics. 19, 10, 12 p., 103022.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  File

  • Matrix 100%
  • Causal Order 80%
  • Quantum State 60%
  • Temporal Order 40%
  • Time Quantum 40%
  22 Citations (Scopus)

  344 Downloads (Pure)
• 2016

  Quantum violation of the pigeonhole principle and the nature of quantum correlations

  Aharonov, Y., Colombo, F., Popescu, S., Sabadini, I., Struppa, D. & Tollaksen, J., 4 Jan 2016, In: Proceedings of the National Academy of Sciences of the United States of America.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Quantum Mechanics 100%
  • Particle 66%
  • Pigeon 66%
  • Light 33%
  • Quantum Correlation 33%
  41 Citations (Scopus)

• Thermodynamics of quantum systems with multiple conserved quantities

  Guryanova, Y., Popescu, S., Short, A. J., Silva, R. & Skrzypczyk, P., 7 Jul 2016, In: Nature Communications. 7, 9 p., 12049.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  File

  • Energy 100%
  • Thermodynamics 100%
  • Standard 100%
  • Comprehension 50%
  • Extract 50%
  75 Citations (Scopus)

  440 Downloads (Pure)
• 2015

  Multiple Observers Can Share the Nonlocality of Half of an Entangled Pair by Using Optimal Weak Measurements

  Silva, R. F., Gisin, N., Guryanova, Y. & Popescu, S., 26 Jun 2015, In: Physical Review Letters. 114, 25, 4 p., 250401.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  Open Access

  File

  • Particle 100%
  • Information 50%
  • Act 50%
  • Spin 50%
  • Bells 50%
  85 Citations (Scopus)

  345 Downloads (Pure)
• 2014

  Coherently enhanced measurements in classical mechanics

  Popescu, S. & Braun, D., Aug 2014, In: Quantum Measurements and Quantum Metrology. 2, 1

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Standard 100%
  • Signal-to-Noise Ratio 100%
  • Decoherence 100%
  • Quantum Measurement 100%
  • Gravitational Constant 100%

• Entanglement enhances cooling in microscopic quantum refrigerators

  Brunner, N., Huber, M., Linden, N., Popescu, S., Silva, R. & Skrzypczyk, P., 13 Mar 2014, In: Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. 89, 3, 032115.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Cooling 100%
  • Refrigerator 100%
  • Work 33%
  • Regimes 33%
  • Baths 33%
  150 Citations (Scopus)

• How Energy Conservation Limits Our Measurements

  Navascues, M. & Popescu, S., 9 Apr 2014, In: Physical Review Letters. 112, 140502.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Targets 100%
  • Constriction 100%
  • Algorithms 50%
  • Boundaries 50%
  • Quantum Mechanics 50%

• Pre- and postselected quantum states: Density matrices, tomography, and Kraus operators

  Popescu, S., Silva, R. F., Guryanova, Y. A., Brunner, N., Linden, N. & Short, A. J., 23 Jan 2014, In: Physical Review A: Atomic, Molecular and Optical Physics. 89, 1, 012121.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Measurement 100%
  • Time 50%
  • Enalapril Maleate 33%
  • Tomography 33%
  • Vectors 33%
  29 Citations (Scopus)

• Work extraction and thermodynamics for individual quantum systems

  Popescu, S., Skrzypczyk, P. & Short, A. J., 27 Jun 2014, In: Nature Communications. 5, 4185.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Thermodynamics 100%
  • Second Law of Thermodynamics 50%
  • Number 25%
  • Device 25%
  • Gibbs Free Energy 25%
  268 Citations (Scopus)
• 2013

  Intra-molecular refrigeration in enzymes

  Popescu, S. & Briegel, H., 8 Oct 2013, In: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 469 , 2158 , 20110290.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Refrigeration 100%
  • Application 50%
  • Potential 50%
  • Reaction Temperature 50%
  • Molecule 50%
  6 Citations (Scopus)

• Oblivious transfer and quantum channels as communication resources

  Gisin, N., Popescu, S., Scarani, V., Wolf, S. & Wullschleger, J., Mar 2013, In: Natural Computing. 12, 1, p. 13-17 5 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Transferring 100%
  • Quantum Dot 75%
  • Quantum Channel 50%
  • Simulation 25%
  • Probability Theory 25%
  5 Citations (Scopus)

• Peculiar features of entangled states with postselection

  Aharonov, Y., Nussinov, S., Popescu, S. & Vaidman, L., 28 Jan 2013, In: Physical Review A: Atomic, Molecular and Optical Physics. 87, 1, 4 p., 014105.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Behavior 100%
  9 Citations (Scopus)

• Quantum Cheshire Cats

  Popescu, S., Aharonov, Y., Rohrlich, D. & Skrzypczyk, P., 7 Nov 2013, In: New Journal of Physics. 15, 113015.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Cats 100%
  • Cat 100%
  • Photons 33%
  131 Citations (Scopus)

• The classical limit of quantum optics: not what it seems at first sight

  Aharonov, Y., Botero, A., Nussinov, S., Popescu, S., Tollaksen, J. & Vaidman, L., 3 Sep 2013, In: New Journal of Physics. 15, 7 p., 093006.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Quantum Optics 100%
  • Wave Optics 75%
  • Optics 25%
  • Light 25%
  • Physics 25%
  14 Citations (Scopus)
• 2012

  A critical view on transport and entanglement in models of photosynthesis

  Tiersch, M., Popescu, S. & Briegel, H. J., 13 Aug 2012, In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 370, 1972, p. 3771-3786 16 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Transport 100%
  • Quantum 66%
  • Conjecture 66%
  • Proof 66%
  • Phenomenology 66%
  31 Citations (Scopus)

• A Quantum Delayed-Choice Experiment

  Peruzzo, A., Shadbolt, P., Brunner, N., Popescu, S. & O'Brien, J. L., 2 Nov 2012, In: Science. 338, 6107, p. 634-637 4 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Behavior 100%
  • Particle 100%
  • Photons 75%
  • Quantum Mechanics 25%
  • Correlation 25%
  174 Citations (Scopus)

• Open Quantum System Approach to the Modeling of Spin Recombination Reactions

  Tiersch, M., Steiner, U. E., Popescu, S. & Briegel, H. J., 26 Apr 2012, In: Journal of Physical Chemistry A. 116, 16, p. 4020-4028 9 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Electron Spin 100%
  • Spin 100%
  • Spin System 100%
  • Procedure 66%
  • Chemical Kinetics Characteristics 66%
  18 Citations (Scopus)

• Persistent dynamic entanglement from classical motion: how bio-molecular machines can generate nontrivial quantum states

  Guerreschi, G. G., Cai, J., Popescu, S. & Briegel, H. J., 29 May 2012, In: New Journal of Physics. 14, p. - 21 p., 053043.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Model 100%
  • Quantum Entanglement 100%
  • Forced Vibration 50%
  • Decoherence 50%
  • Dynamics 50%
  10 Citations (Scopus)

• Virtual qubits, virtual temperatures, and the foundations of thermodynamics

  Brunner, N., Linden, N., Popescu, S. & Skrzypczyk, P., 14 May 2012, In: Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. 85, 5, p. - 14 p., 051117.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Machines 100%
  • Temperature 62%
  • Reaction Temperature 50%
  • Thermodynamics 25%
  • Work 25%
  145 Citations (Scopus)
• 2011

  Can apparent superluminal neutrino speeds be explained as a quantum weak measurement?

  Berry, M. V., Brunner, N., Popescu, S. & Shukla, P., 9 Dec 2011, In: Journal of Physics A: Mathematical and Theoretical. 44, 49, p. - 5 p., 492001.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review
  17 Citations (Scopus)

• Dynamical features of interference phenomena in the presence of entanglement

  Kaufherr, T., Aharonov, Y., Nussinov, S., Popescu, S. & Tollaksen, J., 31 May 2011, In: Physical Review A: Atomic, Molecular and Optical Physics. 83, 5, p. - 14 p., 052127.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Interference 100%
  • Particle 50%
  • Events 33%
  • Approximation 33%
  • Relative Phase 16%
  8 Citations (Scopus)

• Estimating preselected and postselected ensembles

  Massar, S. & Popescu, S., 11 Nov 2011, In: Physical Review A: Atomic, Molecular and Optical Physics. 84, 5, p. - 10 p., 052106.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • State Estimation 100%
  • Complex Conjugate 20%
  • Physical Significance 20%
  9 Citations (Scopus)

• Physics within a quantum reference frame

  Angelo, R., Brunner, N., Popescu, S., Short, A. J. & Skrzypczyk, P., 2011, In: Journal of Physics A: Mathematical and Theoretical. 44, p. 145304

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Physics 100%
  • Particle 66%
  46 Citations (Scopus)

• The smallest refrigerators can reach maximal efficiency

  Skrzypczyk, P., Brunner, N., Linden, N. & Popescu, S., 9 Dec 2011, In: Journal of Physics A: Mathematical and Theoretical. 44, 49, p. - 7 p., 492002.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Efficiency 100%
  • Size 50%
  • Refrigerator 50%
  • Particle Size 50%
  • Constraint 25%
  89 Citations (Scopus)
• 2010

  A time-symmetric formulation of quantum mechanics

  Aharonov, Y., Popescu, S. & Tollaksen, J., Nov 2010, In: Physics Today. 63, 11, p. 27-32 6 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  143 Citations (Scopus)

• Dynamic entanglement in oscillating molecules and potential biological implications

  Cai, J., Popescu, S. & Briegel, HJ., Jun 2010, In: Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. 82, 2, p. 1-10 10 p., 021921.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Environment 100%
  • Molecules 100%
  • Roles 100%
  • Technology 50%
  • Model 50%
  69 Citations (Scopus)

• Entanglement consumption of instantaneous nonlocal quantum measurements

  Clark, S. R., Connor, A. J., Jaksch, D. & Popescu, S., Aug 2010, In: New Journal of Physics. 12, p. 083034-1 - 083034-35 35 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Roles 100%
  • Fundamental Question 100%
  • Quantum Measurement 100%
  • Value 100%
  22 Citations (Scopus)

• How Small Can Thermal Machines Be? The Smallest Possible Refrigerator

  Linden, N., Popescu, S. & Skrzypczyk, P., 21 Sep 2010, In: Physical Review Letters. 105, 13, p. 1-4 4 p., 130401.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Qubit 100%
  • Qutrit 100%
  • Show 66%
  • Refrigerator 66%
  • Nearest Neighbour 33%
  308 Citations (Scopus)

• Motional effects on the efficiency of excitation transfer

  Asadian, A., Tiersch, M., Guerreschi, GG., Cai, J., Popescu, S. & Briegel, HJ., Jul 2010, In: New Journal of Physics. 12, p. 075019-1 - 075019-23 23 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Procedure 100%
  • Application 66%
  • Molecule 66%
  • Energy Transfer 66%
  • Transfer Process 66%
  28 Citations (Scopus)

• On the speed of fluctuations around thermodynamic equilibrium

  Linden, N., Popescu, S., Short, AJ. & Winter, AJ., May 2010, In: New Journal of Physics. 12, p. 055021-1 - 055021-4 4 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Variations 100%
  • Speed 75%
  • Alternatives 25%
  • View 25%
  • Statics 25%
  40 Citations (Scopus)

• Semifluxon degeneracy choreography in Aharonov-Bohm billiards

  Berry, MV. & Popescu, S., Aug 2010, In: Journal of Physics A: Mathematical and Theoretical. 43, p. 354005-1 - 354005-11 11 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Region 100%
  • Independent Variables 100%
  • Calculation 100%
  • Symmetry 100%
  • Boundaries 100%
  6 Citations (Scopus)
• 2009

  Closed sets of nonlocal correlations

  Allcock, JE., Brunner, N., Linden, N., Popescu, S. & Skrzypczyk, P., Dec 2009, In: Physical Review A: Atomic, Molecular and Optical Physics. 80, p. 062107-1 - 062107-6 6 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Correlation 100%
  • Physical Theory 50%
  • Information 50%
  • Theory 50%
  • Physical 50%
  54 Citations (Scopus)

• Emergence of Quantum Correlations from Nonlocality Swapping

  Skrzypczyk, P., Brunner, N. & Popescu, S., Mar 2009, In: Physical Review Letters. 102, 11, p. 1-4 4 p., 110402.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Model 100%
  • Quantum Correlation 100%
  • Boundaries 50%
  • Quantum Mechanics 50%
  • Quantum Entanglement 50%
  31 Citations (Scopus)

• Multiple-time states and multiple-time measurements in quantum mechanics

  Aharonov, Y., Popescu, S., Tollaksen, J. & Vaidman, L., May 2009, In: Physical Review A: Atomic, Molecular and Optical Physics. 79, 5, p. 1-16 16 p., 052110.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Quantum Mechanics 100%
  • Alternatives 33%
  • Time Measurement 33%
  63 Citations (Scopus)

• Quantum mechanical evolution towards thermal equilibrium

  Linden, N., Popescu, S., Short, A. J. & Winter, A. J., Jun 2009, In: Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. 79, 6, 12 p., 061103.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Bath 100%
  • Equilibrium State 100%
  • Thermal Equilibrium 100%
  • Baths 100%
  • Aspect 50%
  406 Citations (Scopus)
• 2008

  Simulation of partial entanglement with no-signaling resources

  Brunner, N., Gisin, N. & Popescu, S., Nov 2008, In: Physical Review A: Atomic, Molecular and Optical Physics. 78, p. 052111-1 - 052111-6 6 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review
  25 Citations (Scopus)

• Testing a Bell inequality in multi-pair scenarios

  Bancal, J-P., Branciard, C., Brunner, N., Gisin, N., Popescu, S. & Simon, C., Nov 2008, In: Physical Review A: Atomic, Molecular and Optical Physics. 78, p. 062110-1 - 062110-8 8 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review
  14 Citations (Scopus)
• 2007

  Knill-Laflamme-Milburn Linear Optics Quantum Computation as a Measurement-Based Computation

  Popescu, S., Dec 2007, In: Physical Review Letters. 99, p. 250501-1 - 250501-4 4 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review
  11 Citations (Scopus)

• Knill-Laflamme-Milburn Quantum Computation with Bosonic Atoms

  Popescu, S., Sep 2007, In: Physical Review Letters. 99, p. 130503-1 - 130503-4 4 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review
  18 Citations (Scopus)

• Quantum Nonlocality and Beyond: Limits from Nonlocal Computation

  Linden, N., Popescu, S., Short, AJ. & Winter, AJ., Oct 2007, In: Physical Review Letters. 99, p. 180502-1 - 180502-4 4 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review
  125 Citations (Scopus)

• Reducing polarization mode dispersion with controlled polarization rotations

  Massar, S. & Popescu, S., Jun 2007, In: New Journal of Physics. 9 (6), p. 158-1 - 158-9 9 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Polarization 100%
  • Optical Fiber 66%
  • Fiber 50%
  • Fibers 50%
  • Polarization Mode Dispersion 50%
  10 Citations (Scopus)

• Sequential weak measurement

  Mitchison, G., Jozsa, RO. & Popescu, S., Dec 2007, In: Physical Review A: Atomic, Molecular and Optical Physics. 76, p. 062105-1 - 062105-9 9 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review
  74 Citations (Scopus)
• 2006

  Entanglement and the foundations of statistical mechanics

  Popescu, S., Short, A. J. & Winter, A., Nov 2006, In: Nature Physics. 2, 11, p. 754-758 5 p.

  Research output: Contribution to journal › Article (Academic Journal) › peer-review

  • Statistical Mechanics 100%
  • Mechanics 100%
  • Area 33%
  • Environment 33%
  • Probability Theory 33%
  700 Citations (Scopus)