New paper out in #PRX_Quantum! 📃📃
We show when a heat-flow reversal is actually a signature of quantum nonclassicality as described by quantum generalized contextuality.
#QuantumInformation #Contextuality #Nonclassicality #QuantumThermodynamics
journals.aps.org/prxquantum/a...
We show when a heat-flow reversal is actually a signature of quantum nonclassicality as described by quantum generalized contextuality.
#QuantumInformation #Contextuality #Nonclassicality #QuantumThermodynamics
journals.aps.org/prxquantum/a...
Contextuality in Anomalous Heat Flow
For a class of quantum systems that exhibit contextuality, a rigorous theoretical connection between anomalous heat flow and quantumness is established, thereby opening avenues to explore nonclassical...
journals.aps.org
September 23, 2025 at 3:03 PM
New paper out in #PRX_Quantum! 📃📃
We show when a heat-flow reversal is actually a signature of quantum nonclassicality as described by quantum generalized contextuality.
#QuantumInformation #Contextuality #Nonclassicality #QuantumThermodynamics
journals.aps.org/prxquantum/a...
We show when a heat-flow reversal is actually a signature of quantum nonclassicality as described by quantum generalized contextuality.
#QuantumInformation #Contextuality #Nonclassicality #QuantumThermodynamics
journals.aps.org/prxquantum/a...
the devices but on nonlocal correlations. Beginning with a contextual understanding of modern cryptographic security and the limitations of standard quantum key distribution methods, this review explores the pivotal role of nonclassicality and the [2/5 of https://arxiv.org/abs/2504.06350v1]
April 10, 2025 at 6:15 AM
the devices but on nonlocal correlations. Beginning with a contextual understanding of modern cryptographic security and the limitations of standard quantum key distribution methods, this review explores the pivotal role of nonclassicality and the [2/5 of https://arxiv.org/abs/2504.06350v1]
and chaotic regions of the phase space, suggesting that the nonclassicality of the system underpins signatures of chaos. [4/4 of https://arxiv.org/abs/2503.13886v1]
March 19, 2025 at 6:17 AM
and chaotic regions of the phase space, suggesting that the nonclassicality of the system underpins signatures of chaos. [4/4 of https://arxiv.org/abs/2503.13886v1]
Massy Khoshbin, Lorenzo Catani, Matthew Leifer
Alternative robust ways of witnessing nonclassicality in the simplest scenario
https://arxiv.org/abs/2311.13474
Alternative robust ways of witnessing nonclassicality in the simplest scenario
https://arxiv.org/abs/2311.13474
March 13, 2024 at 1:07 PM
Massy Khoshbin, Lorenzo Catani, Matthew Leifer
Alternative robust ways of witnessing nonclassicality in the simplest scenario
https://arxiv.org/abs/2311.13474
Alternative robust ways of witnessing nonclassicality in the simplest scenario
https://arxiv.org/abs/2311.13474
Nonclassicality and sub-Planck structures of photon subtracted compass states
https://arxiv.org/pdf/2411.07793
Amit Das, Sobhan Sounda
https://arxiv.org/pdf/2411.07793
Amit Das, Sobhan Sounda
Nonclassicality and sub-Planck structures of photon subtracted compass states
arXiv abstract link
arxiv.org
November 13, 2024 at 5:13 AM
Nonclassicality and sub-Planck structures of photon subtracted compass states
https://arxiv.org/pdf/2411.07793
Amit Das, Sobhan Sounda
https://arxiv.org/pdf/2411.07793
Amit Das, Sobhan Sounda
Measuring coherence via Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases
https://arxiv.org/pdf/2411.11666
Yan Liu, Zhihua Guo, Zhihao Ma, Shao-Ming Fei
https://arxiv.org/pdf/2411.11666
Yan Liu, Zhihua Guo, Zhihao Ma, Shao-Ming Fei
Measuring coherence via Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases
arXiv abstract link
arxiv.org
November 19, 2024 at 6:55 AM
Measuring coherence via Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases
https://arxiv.org/pdf/2411.11666
Yan Liu, Zhihua Guo, Zhihao Ma, Shao-Ming Fei
https://arxiv.org/pdf/2411.11666
Yan Liu, Zhihua Guo, Zhihao Ma, Shao-Ming Fei
Kyu-won Park, Soojoon Lee, Kabgyun Jeong: Local Wigner-Mass Maps and Integrated Negativity as Measures of nonclassicality in Quantum Chaotic Billiards https://arxiv.org/abs/2511.02300 https://arxiv.org/pdf/2511.02300 https://arxiv.org/html/2511.02300
November 5, 2025 at 6:48 AM
Kyu-won Park, Soojoon Lee, Kabgyun Jeong: Local Wigner-Mass Maps and Integrated Negativity as Measures of nonclassicality in Quantum Chaotic Billiards https://arxiv.org/abs/2511.02300 https://arxiv.org/pdf/2511.02300 https://arxiv.org/html/2511.02300
If you are around the Centre for Quantum information and #Quantum control, go check out this talk!
Bárbara will talk about some recent results connecting the quantum thermo effect of anomalous #heat_flow to the notion of generalized #contextuality (considered a 'high-bar' for nonclassicality)
Bárbara will talk about some recent results connecting the quantum thermo effect of anomalous #heat_flow to the notion of generalized #contextuality (considered a 'high-bar' for nonclassicality)
Join us this Friday for this in-person CQIQC Research Seminar 🗓️ Feb. 7 ⏲️ 11:00 a.m. www.physics.utoronto.ca/research/qua...
February 4, 2025 at 2:51 PM
If you are around the Centre for Quantum information and #Quantum control, go check out this talk!
Bárbara will talk about some recent results connecting the quantum thermo effect of anomalous #heat_flow to the notion of generalized #contextuality (considered a 'high-bar' for nonclassicality)
Bárbara will talk about some recent results connecting the quantum thermo effect of anomalous #heat_flow to the notion of generalized #contextuality (considered a 'high-bar' for nonclassicality)
John H. Selby, David Schmid, Elie Wolfe, Ana Bel\'en Sainz, Ravi Kunjwal, Robert W. Spekkens
Accessible fragments of generalized probabilistic theories, cone equivalence, and applications to witnessing nonclassicality
https://arxiv.org/abs/2112.04521
Accessible fragments of generalized probabilistic theories, cone equivalence, and applications to witnessing nonclassicality
https://arxiv.org/abs/2112.04521
April 5, 2024 at 10:14 AM
John H. Selby, David Schmid, Elie Wolfe, Ana Bel\'en Sainz, Ravi Kunjwal, Robert W. Spekkens
Accessible fragments of generalized probabilistic theories, cone equivalence, and applications to witnessing nonclassicality
https://arxiv.org/abs/2112.04521
Accessible fragments of generalized probabilistic theories, cone equivalence, and applications to witnessing nonclassicality
https://arxiv.org/abs/2112.04521
Yujie Zhang, Y\`il\`e Y\=ing, David Schmid: Quantifiers and witnesses for the nonclassicality of measurements and of states https://arxiv.org/abs/2504.02944 https://arxiv.org/pdf/2504.02944 https://arxiv.org/html/2504.02944
April 7, 2025 at 6:15 AM
Yujie Zhang, Y\`il\`e Y\=ing, David Schmid: Quantifiers and witnesses for the nonclassicality of measurements and of states https://arxiv.org/abs/2504.02944 https://arxiv.org/pdf/2504.02944 https://arxiv.org/html/2504.02944
F. Haji Shafiee, O. Mahmoudi, R. Nouroozi, A. Asadian
Nonclassicality of induced coherence witnessed by contextuality
https://arxiv.org/abs/2306.03216
Nonclassicality of induced coherence witnessed by contextuality
https://arxiv.org/abs/2306.03216
February 27, 2024 at 9:08 AM
F. Haji Shafiee, O. Mahmoudi, R. Nouroozi, A. Asadian
Nonclassicality of induced coherence witnessed by contextuality
https://arxiv.org/abs/2306.03216
Nonclassicality of induced coherence witnessed by contextuality
https://arxiv.org/abs/2306.03216
Laura Ares, Nidhin Prasannan, Elizabeth Agudelo, Alfredo Luis, Benjamin Brecht, Christine Silberhorn, Jan Sperling
Photonic Entanglement and Polarization Nonclassicality: Two Manifestations, One Nature
https://arxiv.org/abs/2407.07477
Photonic Entanglement and Polarization Nonclassicality: Two Manifestations, One Nature
https://arxiv.org/abs/2407.07477
July 11, 2024 at 5:01 AM
Laura Ares, Nidhin Prasannan, Elizabeth Agudelo, Alfredo Luis, Benjamin Brecht, Christine Silberhorn, Jan Sperling
Photonic Entanglement and Polarization Nonclassicality: Two Manifestations, One Nature
https://arxiv.org/abs/2407.07477
Photonic Entanglement and Polarization Nonclassicality: Two Manifestations, One Nature
https://arxiv.org/abs/2407.07477
Quantumness Hierarchy in PT-Symmetric Systems Demonstrates Weaker Nonclassicality Than Damped or Amplified Counterparts
Read more:
https://quantumzeitgeist.com/systems-quantumness-hierarchy-symmetric-demonstrates-weaker-nonclassicality-than-damped/
Read more:
https://quantumzeitgeist.com/systems-quantumness-hierarchy-symmetric-demonstrates-weaker-nonclassicality-than-damped/
Quantumness Hierarchy In PT-Symmetric Systems Demonstrates Weaker Nonclassicality Than Damped Or Amplified Counterparts
Researchers demonstrate that a specially engineered quantum system, balancing both energy loss and gain, can generate stronger and more persistent non-classical quantum states than systems relying solely on loss or gain, offering advantages for practical quantum technologies.
quantumzeitgeist.com
October 8, 2025 at 12:06 PM
Quantumness Hierarchy in PT-Symmetric Systems Demonstrates Weaker Nonclassicality Than Damped or Amplified Counterparts
Read more:
https://quantumzeitgeist.com/systems-quantumness-hierarchy-symmetric-demonstrates-weaker-nonclassicality-than-damped/
Read more:
https://quantumzeitgeist.com/systems-quantumness-hierarchy-symmetric-demonstrates-weaker-nonclassicality-than-damped/
Spencer Rogers, Tommy Muth, Wenchao Ge
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
September 16, 2024 at 9:01 AM
Spencer Rogers, Tommy Muth, Wenchao Ge
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
Stephan De Bievre, Marco Merkli, Paul E. Parris
Rigorous results on approach to thermal equilibrium, entanglement, and nonclassicality of an optical quantum field mode scattering from the elements of a non-equilibrium quantum reservoir
https://arxiv.org/abs/2312.14290
Rigorous results on approach to thermal equilibrium, entanglement, and nonclassicality of an optical quantum field mode scattering from the elements of a non-equilibrium quantum reservoir
https://arxiv.org/abs/2312.14290
May 21, 2024 at 6:05 AM
Stephan De Bievre, Marco Merkli, Paul E. Parris
Rigorous results on approach to thermal equilibrium, entanglement, and nonclassicality of an optical quantum field mode scattering from the elements of a non-equilibrium quantum reservoir
https://arxiv.org/abs/2312.14290
Rigorous results on approach to thermal equilibrium, entanglement, and nonclassicality of an optical quantum field mode scattering from the elements of a non-equilibrium quantum reservoir
https://arxiv.org/abs/2312.14290
arXiv:2503.22817v1 Announce Type: new
Abstract: From the nonclassicality of photon superbunching to the basic property of intensity, we characterize light with correlation and coherence functions. The correlation functions for nonstationary sources, [1/3 of https://arxiv.org/abs/2503.22817v1]
Abstract: From the nonclassicality of photon superbunching to the basic property of intensity, we characterize light with correlation and coherence functions. The correlation functions for nonstationary sources, [1/3 of https://arxiv.org/abs/2503.22817v1]
April 1, 2025 at 6:15 AM
arXiv:2503.22817v1 Announce Type: new
Abstract: From the nonclassicality of photon superbunching to the basic property of intensity, we characterize light with correlation and coherence functions. The correlation functions for nonstationary sources, [1/3 of https://arxiv.org/abs/2503.22817v1]
Abstract: From the nonclassicality of photon superbunching to the basic property of intensity, we characterize light with correlation and coherence functions. The correlation functions for nonstationary sources, [1/3 of https://arxiv.org/abs/2503.22817v1]
arXiv:2504.02944v1 Announce Type: new
Abstract: In a recent work, arXiv:2503.05884, we proposed a unified notion of nonclassicality that applies to arbitrary processes in quantum theory, including individual quantum states, measurements, channels, [1/4 of https://arxiv.org/abs/2504.02944v1]
Abstract: In a recent work, arXiv:2503.05884, we proposed a unified notion of nonclassicality that applies to arbitrary processes in quantum theory, including individual quantum states, measurements, channels, [1/4 of https://arxiv.org/abs/2504.02944v1]
April 7, 2025 at 6:16 AM
arXiv:2504.02944v1 Announce Type: new
Abstract: In a recent work, arXiv:2503.05884, we proposed a unified notion of nonclassicality that applies to arbitrary processes in quantum theory, including individual quantum states, measurements, channels, [1/4 of https://arxiv.org/abs/2504.02944v1]
Abstract: In a recent work, arXiv:2503.05884, we proposed a unified notion of nonclassicality that applies to arbitrary processes in quantum theory, including individual quantum states, measurements, channels, [1/4 of https://arxiv.org/abs/2504.02944v1]
The logical structure of contextuality and nonclassicality
https://arxiv.org/pdf/2506.15071
Songyi Liu, Yongjun Wang, Baoshan Wang, Chang He, Jinchng Wang.
https://arxiv.org/pdf/2506.15071
Songyi Liu, Yongjun Wang, Baoshan Wang, Chang He, Jinchng Wang.
https://arxiv.org/abs/2506.15071
arXiv abstract link
arxiv.org
June 19, 2025 at 4:34 AM
The logical structure of contextuality and nonclassicality
https://arxiv.org/pdf/2506.15071
Songyi Liu, Yongjun Wang, Baoshan Wang, Chang He, Jinchng Wang.
https://arxiv.org/pdf/2506.15071
Songyi Liu, Yongjun Wang, Baoshan Wang, Chang He, Jinchng Wang.
Spencer Rogers, Tommy Muth, Wenchao Ge
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
July 23, 2024 at 12:31 PM
Spencer Rogers, Tommy Muth, Wenchao Ge
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
Somayeh Kourkinejat, Ali Mahdifar, Ehsan Amooghorban
Curvature-Induced Nonclassicality in a Generalized Jaynes-Cummings Model
https://arxiv.org/abs/2507.05407
Curvature-Induced Nonclassicality in a Generalized Jaynes-Cummings Model
https://arxiv.org/abs/2507.05407
July 9, 2025 at 7:54 AM
Somayeh Kourkinejat, Ali Mahdifar, Ehsan Amooghorban
Curvature-Induced Nonclassicality in a Generalized Jaynes-Cummings Model
https://arxiv.org/abs/2507.05407
Curvature-Induced Nonclassicality in a Generalized Jaynes-Cummings Model
https://arxiv.org/abs/2507.05407
Yan Liu, Zhihua Guo, Zhihao Ma, Shao-Ming Fei
Measuring coherence via Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases
https://arxiv.org/abs/2411.11666
Measuring coherence via Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases
https://arxiv.org/abs/2411.11666
November 19, 2024 at 8:32 AM
Yan Liu, Zhihua Guo, Zhihao Ma, Shao-Ming Fei
Measuring coherence via Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases
https://arxiv.org/abs/2411.11666
Measuring coherence via Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases
https://arxiv.org/abs/2411.11666
between the modes as well as the interaction strength. The Wigner quasiprobability distribution of an arbitrary post-selection state is computed. Its nonclassicality is examined via the negativity of the Wigner distribution. The sub-Poissonian nature [4/6 of https://arxiv.org/abs/2504.08515v1]
April 14, 2025 at 6:19 AM
between the modes as well as the interaction strength. The Wigner quasiprobability distribution of an arbitrary post-selection state is computed. Its nonclassicality is examined via the negativity of the Wigner distribution. The sub-Poissonian nature [4/6 of https://arxiv.org/abs/2504.08515v1]
examples. Additionally, we obtain analytical expressions, as a function of time, for some statistical properties of the cavity field, as well as for the nonclassical depth, $\tau_m$, a nonclassicality measure calculated directly from the $P$-function. [4/4 of https://arxiv.org/abs/2504.18763v1]
April 29, 2025 at 6:17 AM
examples. Additionally, we obtain analytical expressions, as a function of time, for some statistical properties of the cavity field, as well as for the nonclassical depth, $\tau_m$, a nonclassicality measure calculated directly from the $P$-function. [4/4 of https://arxiv.org/abs/2504.18763v1]
🔄 Updated Arxiv Paper
Title: Revealing hidden physical nonclassicality with nonnegative polynomials
Authors: Ties-A. Ohst, Benjamin Yadin, Birte Ostermann, Timo de Wolff, Otfried G\"uhne, Hai-Chau Nguyen
Read more: https://arxiv.org/abs/2403.09807
Title: Revealing hidden physical nonclassicality with nonnegative polynomials
Authors: Ties-A. Ohst, Benjamin Yadin, Birte Ostermann, Timo de Wolff, Otfried G\"uhne, Hai-Chau Nguyen
Read more: https://arxiv.org/abs/2403.09807
February 12, 2025 at 8:05 AM
🔄 Updated Arxiv Paper
Title: Revealing hidden physical nonclassicality with nonnegative polynomials
Authors: Ties-A. Ohst, Benjamin Yadin, Birte Ostermann, Timo de Wolff, Otfried G\"uhne, Hai-Chau Nguyen
Read more: https://arxiv.org/abs/2403.09807
Title: Revealing hidden physical nonclassicality with nonnegative polynomials
Authors: Ties-A. Ohst, Benjamin Yadin, Birte Ostermann, Timo de Wolff, Otfried G\"uhne, Hai-Chau Nguyen
Read more: https://arxiv.org/abs/2403.09807
Spencer Rogers, Tommy Muth, Wenchao Ge
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
October 4, 2024 at 12:02 PM
Spencer Rogers, Tommy Muth, Wenchao Ge
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717
Quantifying nonclassicality of mixed Fock states
https://arxiv.org/abs/2406.01717