Professor Sandu Popescu

Search results

• 2024

  Angular momentum flow without anything carrying it

  Aharonov, Y., Collins, D. & Popescu, S., 5 Sept 2024, In: Physical Review A. 110, 3, p. 1-6 6 p., L030201.

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

  Open Access

  • Conserved Quantity 100%
  • Angular Momentum 100%
  • Conservation Law 50%
  2 Citations (Scopus)

• Classical-to-quantum non-signalling boxes

  Ferrera, C. M., Simmons, R., Purcell, J., Collins, D. & Popescu, S., 22 Aug 2024, In: Quantum. 8, p. 1-14 14 p.

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

  Open Access

  • Quantum Nonlocality 100%
• 2023

  Conservation laws and the foundations of quantum mechanics

  Aharonov, Y., Popescu, S. & Rohrlich, D., 3 Oct 2023, In: Proceedings of the National Academy of Sciences of the United States of America. 120, 41, e2220810120.

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

  Open Access

  • Quantum 100%
  • Foundations of quantum mechanics 100%
  • Conservation Law 100%
  • USA 33%
  • Holistic 33%
  6 Citations (Scopus)
• 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

  • Quantum Effect 100%
  • Communication Channel 100%
  • Dynamic Effect 100%
  • Logic Gate 100%
  • Conserved Quantity 100%
  27 Citations (Scopus)

  112 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
  31 Citations (Scopus)

  117 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

  • Conservation Law 100%
  22 Citations (Scopus)
• 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

  • Bell Inequality 100%
  • Quantum Theory 100%
  58 Citations (Scopus)

  97 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

  • Reference Frame 100%
  • Conserved Quantity 100%
  • Angular Momentum 100%
  • Conservation Law 100%
  14 Citations (Scopus)

  137 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

  • Quantum Theory 100%
  4 Citations (Scopus)

  139 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%
  • Reference System 20%
  • Realization 20%
  • Conservation Law 20%
  21 Citations (Scopus)

  402 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 100%
  • Quantum State 100%
  • Temporal Order 40%
  31 Citations (Scopus)

  393 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 Correlation 100%
  56 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

  • Quantum System 100%
  • Conserved Quantity 100%
  • Energy Engineering 28%
  • Constrains 14%
  102 Citations (Scopus)

  487 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
  127 Citations (Scopus)

  393 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

  • Signal-to-Noise Ratio 100%
  • Quantum Measurement 100%
  • Weak Interaction 100%
  • Classical Mechanics 100%
  • Measurement Theory 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

  • Work 100%
  179 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

  • Energy Spectra 100%
  32 Citations (Scopus)

• 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

  • Tomography 100%
  • Quantum Measurement 50%
  38 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

  • Second Law of Thermodynamics 100%
  • Free Energy 100%
  • Carnot Cycle 100%
  • Quantum System 100%
  • Initial State 33%
  334 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%
  • Enzymatic Reaction 50%
  7 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

  • Communication Resource 100%
  • Quantum Channel 100%
  • Qubit 100%
  • Quantum Dot 100%
  • Communication Complexity 50%
  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%
  13 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

  • Cat 100%
  166 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 Sept 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%
  • Physics 25%
  • Geometrical Optics 25%
  16 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

  • Quantum Information 100%
  • Coherence 100%
  • Quantum Optics 100%
  32 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

  • Quantum Mechanics 100%
  197 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

  • Quantum System 100%
  • Recombination Reaction 100%
  • Master Equation 100%
  • Open Quantum Systems 100%
  • Reaction Kinetics 100%
  23 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

  • Quantum Entanglement 100%
  • Forced Vibration 100%
  • Degree of Freedom 50%
  11 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

  • Qubit 100%
  • Quantum Dot 100%
  • Negative Value 25%
  • Positive Value 25%
  • Entropy Production 25%
  173 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

  • Entanglement 100%
  • Born-Oppenheimer Approximation 100%
  • Aharonov-Bohm Effect 50%
  • Relative Phase 33%
  • Significant Change 33%
  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

  • Quantum State 100%
  • State Estimation 100%
  • Statistical Ensemble 100%
  • Covariant 50%
  • Complex Conjugate 50%
  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%
  64 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

  • Carnot Efficiency 100%
  • Qubit 100%
  • Maximal Efficiency 100%
  • Quantum Dot 100%
  96 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

  160 Citations (Scopus)

• Dynamic entanglement in oscillating molecules and potential biological implications

  Cai, J., Popescu, S. & Briegel, H., 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

  • Oscillation 100%
  • Quantum Technology 100%
  • Oscillatory Motion 100%
  71 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

  • Quantum Measurement 100%
  25 Citations (Scopus)

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

  Linden, N., Popescu, S. & Skrzypczyk, P., 21 Sept 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%
  • Quantum Dot 100%
  • Nearest Neighbour 33%
  • Neighbor Interaction 33%
  357 Citations (Scopus)

• Motional effects on the efficiency of excitation transfer

  Asadian, A., Tiersch, M., Guerreschi, G., Cai, J., Popescu, S. & Briegel, H., 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

  • Energy Transfer 100%
  • Motion 100%
  • Transfer Process 50%
  • Transport Process 50%
  • Technological Process 50%
  30 Citations (Scopus)

• On the speed of fluctuations around thermodynamic equilibrium

  Linden, N., Popescu, S., Short, A. & Winter, A., 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

  • Quantum System 100%
  • Equilibrium State 100%
  • Thermodynamic Equilibrium 100%
  • Thermal Equilibrium 100%
  43 Citations (Scopus)

• Semifluxon degeneracy choreography in Aharonov-Bohm billiards

  Berry, M. & 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

  • Circle 100%
  • Quantum Particle 50%
  • Conformal Transformation 50%
  • Shape Parameter 50%
  • Magnetic Flux 50%
  6 Citations (Scopus)
• 2009

  Closed sets of nonlocal correlations

  Allcock, J., 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

  • Quantum Nonlocality 100%
  62 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

  • Quantum Correlation 100%
  • Quantum Entanglement 50%
  • Teleportation 50%
  35 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

  • Time Measurement 100%
  81 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

  • Equilibrium State 100%
  • Thermal Equilibrium 100%
  • Statistical Mechanics 100%
  • Open Problem 50%
  • Microstate 50%
  464 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
  28 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
  15 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., Sept 2007, In: Physical Review Letters. 99, p. 130503-1 - 130503-4 4 p.

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

• Quantum Nonlocality and Beyond: Limits from Nonlocal Computation

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

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